Add comprehensive README and update module documentation

This commit is contained in:
Patrick de Ruiter 2025-11-01 10:19:31 +01:00
parent 056ea07811
commit 5c1102dfa6
Signed by: pderuiter
GPG Key ID: 5EBA7F21CF583321
1756 changed files with 159308 additions and 162 deletions

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.gitignore vendored
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*.tfstate
*.tfstate.backup
.terraform
provider.tf
*.tfvars
**/*.tfvars
provider.tf
.github
.circleci

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# This file is maintained automatically by "terraform init".
# Manual edits may be lost in future updates.
provider "registry.terraform.io/datadog/datadog" {
version = "3.1.2"
constraints = ">= 2.12.0, >= 2.13.0"
hashes = [
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}
provider "registry.terraform.io/hashicorp/archive" {
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provider "registry.terraform.io/hashicorp/aws" {
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}
provider "registry.terraform.io/hashicorp/external" {
version = "2.1.0"
constraints = ">= 1.2.0"
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}
provider "registry.terraform.io/hashicorp/local" {
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constraints = ">= 1.3.0"
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}
provider "registry.terraform.io/hashicorp/template" {
version = "2.2.0"
constraints = ">= 2.0.0"
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}

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Subproject commit dc699992922b452ccc521c3dfe9c9c5c1f8376af

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Apache License
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SHELL := /bin/bash
# List of targets the `readme` target should call before generating the readme
export README_DEPS ?= docs/targets.md docs/terraform.md
-include $(shell curl -sSL -o .build-harness "https://git.io/build-harness"; echo .build-harness)
## Lint terraform code
lint:
$(SELF) terraform/install terraform/get-modules terraform/get-plugins terraform/lint terraform/validate

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<!-- markdownlint-disable -->
# terraform-null-label [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-null-label.svg)](https://github.com/cloudposse/terraform-null-label/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
<!-- markdownlint-restore -->
[![README Header][readme_header_img]][readme_header_link]
[![Cloud Posse][logo]](https://cpco.io/homepage)
<!--
** DO NOT EDIT THIS FILE
**
** This file was automatically generated by the `build-harness`.
** 1) Make all changes to `README.yaml`
** 2) Run `make init` (you only need to do this once)
** 3) Run`make readme` to rebuild this file.
**
** (We maintain HUNDREDS of open source projects. This is how we maintain our sanity.)
**
-->
Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
This module generates names using the following convention by default: `{namespace}-{environment}-{stage}-{name}-{attributes}`.
However, it is highly configurable. The delimiter (e.g. `-`) is configurable. Each label item is optional (although you must provide at least one).
So if you prefer the term `stage` to `environment`
you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
- If attributes are excluded but `namespace`, `stage`, and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`.
- If you want the attributes in a different order, you can specify that, too, with the `label_order` list.
- You can set a maximum length for the name, and the module will create a unique name that fits within that length.
- You can control the letter case of the generated labels which make up the `id` using `var.label_value_case`.
- The labels are also exported as tags. You can control the case of the tag names (keys) using `var.label_tag_case`.
It's recommended to use one `terraform-null-label` module for every unique resource of a given resource type.
For example, if you have 10 instances, there should be 10 different labels.
However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.
All [Cloud Posse modules](https://github.com/cloudposse?utf8=%E2%9C%93&q=terraform-&type=&language=) use this module to ensure resources can be instantiated multiple times within an account and without conflict.
**NOTE:** The `null` originally referred to the primary Terraform [provider](https://www.terraform.io/docs/providers/null/index.html) used in this module.
With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.
- Releases of this module from `0.23.0` onward only work with Terraform 0.13 or newer.
- Releases of this module from `0.12.0` through `0.22.1` support `HCL2` and are compatible with Terraform 0.12 or newer.
- Releases of this module prior to `0.12.0` are compatible with earlier versions of terraform like Terraform 0.11.
---
This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps.
[<img align="right" title="Share via Email" src="https://docs.cloudposse.com/images/ionicons/ios-email-outline-2.0.1-16x16-999999.svg"/>][share_email]
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[![Terraform Open Source Modules](https://docs.cloudposse.com/images/terraform-open-source-modules.svg)][terraform_modules]
It's 100% Open Source and licensed under the [APACHE2](LICENSE).
We literally have [*hundreds of terraform modules*][terraform_modules] that are Open Source and well-maintained. Check them out!
## Security & Compliance [<img src="https://cloudposse.com/wp-content/uploads/2020/11/bridgecrew.svg" width="250" align="right" />](https://bridgecrew.io/)
Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.
| Benchmark | Description |
|--------|---------------|
| [![Infrastructure Security](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/general)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=INFRASTRUCTURE+SECURITY) | Infrastructure Security Compliance |
| [![CIS KUBERNETES](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_kubernetes)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+KUBERNETES+V1.5) | Center for Internet Security, KUBERNETES Compliance |
| [![CIS AWS](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_aws)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+AWS+V1.2) | Center for Internet Security, AWS Compliance |
| [![CIS AZURE](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_azure)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+AZURE+V1.1) | Center for Internet Security, AZURE Compliance |
| [![PCI-DSS](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/pci)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=PCI-DSS+V3.2) | Payment Card Industry Data Security Standards Compliance |
| [![NIST-800-53](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/nist)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=NIST-800-53) | National Institute of Standards and Technology Compliance |
| [![ISO27001](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/iso)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=ISO27001) | Information Security Management System, ISO/IEC 27001 Compliance |
| [![SOC2](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/soc2)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=SOC2)| Service Organization Control 2 Compliance |
| [![CIS GCP](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_gcp)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+GCP+V1.1) | Center for Internet Security, GCP Compliance |
| [![HIPAA](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/hipaa)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=HIPAA) | Health Insurance Portability and Accountability Compliance |
## Usage
**IMPORTANT:** We do not pin modules to versions in our examples because of the
difficulty of keeping the versions in the documentation in sync with the latest released versions.
We highly recommend that in your code you pin the version to the exact version you are
using so that your infrastructure remains stable, and update versions in a
systematic way so that they do not catch you by surprise.
Also, because of a bug in the Terraform registry ([hashicorp/terraform#21417](https://github.com/hashicorp/terraform/issues/21417)),
the registry shows many of our inputs as required when in fact they are optional.
The table below correctly indicates which inputs are required.
### Defaults
Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
The context object is a single object that contains all the input values for `terraform-null-label`.
However, each input value can also be specified individually by name as a standard Terraform variable,
and the value of those variables, when set to something other than `null`, will override the value
in the context object. In order to allow chaining of these objects, where the context object input to one
module is transformed and passed to the next module, all the variables default to `null` or empty collections.
The actual default values used when nothing is explicitly set are describe in the documentation below.
For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
`terraform-null-label` will actually use the default delimiter `-` (hyphen).
A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
future modules in the chain cannot reset the value back to the original default. Insted, the new setting
becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
be overwritten.
### Simple Example
```hcl
module "eg_prod_bastion_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["public"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
```
This will create an `id` with the value of `eg-prod-bastion-public` because when generating `id`, the default order is `namespace`, `environment`, `stage`, `name`, `attributes`
(you can override it by using the `label_order` variable, see [Advanced Example 3](#advanced-example-3)).
Now reference the label when creating an instance:
```hcl
resource "aws_instance" "eg_prod_bastion_public" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_label.tags
}
```
Or define a security group:
```hcl
resource "aws_security_group" "eg_prod_bastion_public" {
vpc_id = var.vpc_id
name = module.eg_prod_bastion_label.id
tags = module.eg_prod_bastion_label.tags
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
```
### Advanced Example
Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
<details><summary>Click to show</summary>
```hcl
module "eg_prod_bastion_abc_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["abc"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_abc" {
name = module.eg_prod_bastion_abc_label.id
tags = module.eg_prod_bastion_abc_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_abc" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_abc_label.tags
  vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}
module "eg_prod_bastion_xyz_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["xyz"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_xyz" {
name = module.eg_prod_bastion_xyz_label.id
tags = module.eg_prod_bastion_xyz_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_xyz" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_xyz_label.tags
vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}
```
</details>
### Advanced Example 2
Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
<details><summary>Click to show</summary>
```hcl
tags = [
{
key = Name,
propagate_at_launch = 1,
value = namespace-stage-name
},
{
key = Namespace,
propagate_at_launch = 1,
value = namespace
},
{
key = Stage,
propagate_at_launch = 1,
value = stage
}
]
```
Autoscaling group using propagating tagging below (full example: [autoscalinggroup](examples/autoscalinggroup/main.tf))
```hcl
################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
namespace = "cp"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template = {
id = "aws_launch_template.default.id
version = "$$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
```
</details>
### Advanced Example 3
See [complete example](./examples/complete) for even more examples.
This example shows how you can pass the `context` output of one label module to the next label_module,
allowing you to create one label that has the base set of values, and then creating every extra label
as a derivative of that.
<details><summary>Click to show</summary>
```hcl
module "label1" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
module "label2" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
tags = {
"City" = "London"
"Environment" = "Public"
}
}
module "label3" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
```
This creates label outputs like this:
```hcl
label1 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"id" = "winstonchurchroom-uat-build-fire-water-earth-air"
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"stage" = "build"
}
label1_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Winston Churchroom"
"namespace" = "CloudPosse"
"stage" = "build"
"tags" = {
"City" = "Dublin"
"Environment" = "Private"
}
}
label1_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9]/"
"stage" = "build"
"tags" = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
}
label1_tags = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
label2 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"id" = "charlie+uat+test+fire+water+earth+air"
"name" = "charlie"
"namespace" = "cloudposse"
"stage" = "test"
}
label2_context = {
"additional_tag_map" = {
"additional_tag" = "yes"
"propagate_at_launch" = "true"
}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Charlie"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
"stage" = "test"
"tags" = {
"City" = "London"
"Environment" = "Public"
}
}
label2_tags = {
"Attributes" = "fire+water+earth+air"
"City" = "London"
"Environment" = "Public"
"Name" = "charlie+uat+test+fire+water+earth+air"
"Namespace" = "cloudposse"
"Stage" = "test"
}
label2_tags_as_list_of_maps = [
{
"additional_tag" = "yes"
"key" = "Attributes"
"propagate_at_launch" = "true"
"value" = "fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "City"
"propagate_at_launch" = "true"
"value" = "London"
},
{
"additional_tag" = "yes"
"key" = "Environment"
"propagate_at_launch" = "true"
"value" = "Public"
},
{
"additional_tag" = "yes"
"key" = "Name"
"propagate_at_launch" = "true"
"value" = "charlie+uat+test+fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "Namespace"
"propagate_at_launch" = "true"
"value" = "cloudposse"
},
{
"additional_tag" = "yes"
"key" = "Stage"
"propagate_at_launch" = "true"
"value" = "test"
},
]
label3 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"id" = "starfish.uat.release.fire.water.earth.air"
"name" = "starfish"
"namespace" = "cloudposse"
"stage" = "release"
}
label3_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Starfish"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
}
}
label3_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "starfish"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
}
label3_tags = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
```
</details>
<!-- markdownlint-disable -->
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
```
<!-- markdownlint-restore -->
<!-- markdownlint-disable -->
## Requirements
| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
## Providers
No provider.
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
## Outputs
| Name | Description |
|------|-------------|
| additional\_tag\_map | The merged additional\_tag\_map |
| attributes | List of attributes |
| context | Merged but otherwise unmodified input to this module, to be used as context input to other modules.<br>Note: this version will have null values as defaults, not the values actually used as defaults. |
| delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
| enabled | True if module is enabled, false otherwise |
| environment | Normalized environment |
| id | Disambiguated ID restricted to `id_length_limit` characters in total |
| id\_full | Disambiguated ID not restricted in length |
| id\_length\_limit | The id\_length\_limit actually used to create the ID, with `0` meaning unlimited |
| label\_order | The naming order actually used to create the ID |
| name | Normalized name |
| namespace | Normalized namespace |
| normalized\_context | Normalized context of this module |
| regex\_replace\_chars | The regex\_replace\_chars actually used to create the ID |
| stage | Normalized stage |
| tags | Normalized Tag map |
| tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
<!-- markdownlint-restore -->
## Share the Love
Like this project? Please give it a ★ on [our GitHub](https://github.com/cloudposse/terraform-null-label)! (it helps us **a lot**)
Are you using this project or any of our other projects? Consider [leaving a testimonial][testimonial]. =)
## Related Projects
Check out these related projects.
- [terraform-terraform-label](https://github.com/cloudposse/terraform-terraform-label) - Terraform Module to define a consistent naming convention by (namespace, environment, stage, name, [attributes])
## Help
**Got a question?** We got answers.
File a GitHub [issue](https://github.com/cloudposse/terraform-null-label/issues), send us an [email][email] or join our [Slack Community][slack].
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[![zoom](https://img.cloudposse.com/fit-in/200x200/https://cloudposse.com/wp-content/uploads/2019/08/Powered-by-Zoom.png")][office_hours]
## Contributing
### Bug Reports & Feature Requests
Please use the [issue tracker](https://github.com/cloudposse/terraform-null-label/issues) to report any bugs or file feature requests.
### Developing
If you are interested in being a contributor and want to get involved in developing this project or [help out](https://cpco.io/help-out) with our other projects, we would love to hear from you! Shoot us an [email][email].
In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
1. **Fork** the repo on GitHub
2. **Clone** the project to your own machine
3. **Commit** changes to your own branch
4. **Push** your work back up to your fork
5. Submit a **Pull Request** so that we can review your changes
**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
## Copyright
Copyright © 2017-2021 [Cloud Posse, LLC](https://cpco.io/copyright)
## License
[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
See [LICENSE](LICENSE) for full details.
```text
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
```
## Trademarks
All other trademarks referenced herein are the property of their respective owners.
## About
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Check out [our other projects][github], [follow us on twitter][twitter], [apply for a job][jobs], or [hire us][hire] to help with your cloud strategy and implementation.
### Contributors
<!-- markdownlint-disable -->
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|---|---|---|---|---|---|---|---|---|---|
<!-- markdownlint-restore -->
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View File

@ -0,0 +1,618 @@
name: terraform-null-label
tags:
- aws
- terraform
- terraform-modules
- naming-convention
- name
- namespace
- stage
categories:
- terraform-modules/supported
license: APACHE2
github_repo: cloudposse/terraform-null-label
badges:
- name: Latest Release
image: https://img.shields.io/github/release/cloudposse/terraform-null-label.svg
url: https://github.com/cloudposse/terraform-null-label/releases/latest
- name: Slack Community
image: https://slack.cloudposse.com/badge.svg
url: https://slack.cloudposse.com
related:
- name: terraform-terraform-label
description: Terraform Module to define a consistent naming convention by (namespace,
environment, stage, name, [attributes])
url: https://github.com/cloudposse/terraform-terraform-label
description: |-
Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
This module generates names using the following convention by default: `{namespace}-{environment}-{stage}-{name}-{attributes}`.
However, it is highly configurable. The delimiter (e.g. `-`) is configurable. Each label item is optional (although you must provide at least one).
So if you prefer the term `stage` to `environment`
you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
- If attributes are excluded but `namespace`, `stage`, and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`.
- If you want the attributes in a different order, you can specify that, too, with the `label_order` list.
- You can set a maximum length for the name, and the module will create a unique name that fits within that length.
- You can control the letter case of the generated labels which make up the `id` using `var.label_value_case`.
- The labels are also exported as tags. You can control the case of the tag names (keys) using `var.label_tag_case`.
It's recommended to use one `terraform-null-label` module for every unique resource of a given resource type.
For example, if you have 10 instances, there should be 10 different labels.
However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.
All [Cloud Posse modules](https://github.com/cloudposse?utf8=%E2%9C%93&q=terraform-&type=&language=) use this module to ensure resources can be instantiated multiple times within an account and without conflict.
**NOTE:** The `null` originally referred to the primary Terraform [provider](https://www.terraform.io/docs/providers/null/index.html) used in this module.
With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.
- Releases of this module from `0.23.0` onward only work with Terraform 0.13 or newer.
- Releases of this module from `0.12.0` through `0.22.1` support `HCL2` and are compatible with Terraform 0.12 or newer.
- Releases of this module prior to `0.12.0` are compatible with earlier versions of terraform like Terraform 0.11.
usage: |-
### Defaults
Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
The context object is a single object that contains all the input values for `terraform-null-label`.
However, each input value can also be specified individually by name as a standard Terraform variable,
and the value of those variables, when set to something other than `null`, will override the value
in the context object. In order to allow chaining of these objects, where the context object input to one
module is transformed and passed to the next module, all the variables default to `null` or empty collections.
The actual default values used when nothing is explicitly set are describe in the documentation below.
For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
`terraform-null-label` will actually use the default delimiter `-` (hyphen).
A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
future modules in the chain cannot reset the value back to the original default. Insted, the new setting
becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
be overwritten.
### Simple Example
```hcl
module "eg_prod_bastion_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["public"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
```
This will create an `id` with the value of `eg-prod-bastion-public` because when generating `id`, the default order is `namespace`, `environment`, `stage`, `name`, `attributes`
(you can override it by using the `label_order` variable, see [Advanced Example 3](#advanced-example-3)).
Now reference the label when creating an instance:
```hcl
resource "aws_instance" "eg_prod_bastion_public" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_label.tags
}
```
Or define a security group:
```hcl
resource "aws_security_group" "eg_prod_bastion_public" {
vpc_id = var.vpc_id
name = module.eg_prod_bastion_label.id
tags = module.eg_prod_bastion_label.tags
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
```
### Advanced Example
Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
<details><summary>Click to show</summary>
```hcl
module "eg_prod_bastion_abc_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["abc"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_abc" {
name = module.eg_prod_bastion_abc_label.id
tags = module.eg_prod_bastion_abc_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_abc" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_abc_label.tags
  vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}
module "eg_prod_bastion_xyz_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["xyz"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_xyz" {
name = module.eg_prod_bastion_xyz_label.id
tags = module.eg_prod_bastion_xyz_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_xyz" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_xyz_label.tags
vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}
```
</details>
### Advanced Example 2
Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
<details><summary>Click to show</summary>
```hcl
tags = [
{
key = Name,
propagate_at_launch = 1,
value = namespace-stage-name
},
{
key = Namespace,
propagate_at_launch = 1,
value = namespace
},
{
key = Stage,
propagate_at_launch = 1,
value = stage
}
]
```
Autoscaling group using propagating tagging below (full example: [autoscalinggroup](examples/autoscalinggroup/main.tf))
```hcl
################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
namespace = "cp"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template = {
id = "aws_launch_template.default.id
version = "$$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
```
</details>
### Advanced Example 3
See [complete example](./examples/complete) for even more examples.
This example shows how you can pass the `context` output of one label module to the next label_module,
allowing you to create one label that has the base set of values, and then creating every extra label
as a derivative of that.
<details><summary>Click to show</summary>
```hcl
module "label1" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
module "label2" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
tags = {
"City" = "London"
"Environment" = "Public"
}
}
module "label3" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
```
This creates label outputs like this:
```hcl
label1 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"id" = "winstonchurchroom-uat-build-fire-water-earth-air"
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"stage" = "build"
}
label1_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Winston Churchroom"
"namespace" = "CloudPosse"
"stage" = "build"
"tags" = {
"City" = "Dublin"
"Environment" = "Private"
}
}
label1_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9]/"
"stage" = "build"
"tags" = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
}
label1_tags = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
label2 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"id" = "charlie+uat+test+fire+water+earth+air"
"name" = "charlie"
"namespace" = "cloudposse"
"stage" = "test"
}
label2_context = {
"additional_tag_map" = {
"additional_tag" = "yes"
"propagate_at_launch" = "true"
}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Charlie"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
"stage" = "test"
"tags" = {
"City" = "London"
"Environment" = "Public"
}
}
label2_tags = {
"Attributes" = "fire+water+earth+air"
"City" = "London"
"Environment" = "Public"
"Name" = "charlie+uat+test+fire+water+earth+air"
"Namespace" = "cloudposse"
"Stage" = "test"
}
label2_tags_as_list_of_maps = [
{
"additional_tag" = "yes"
"key" = "Attributes"
"propagate_at_launch" = "true"
"value" = "fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "City"
"propagate_at_launch" = "true"
"value" = "London"
},
{
"additional_tag" = "yes"
"key" = "Environment"
"propagate_at_launch" = "true"
"value" = "Public"
},
{
"additional_tag" = "yes"
"key" = "Name"
"propagate_at_launch" = "true"
"value" = "charlie+uat+test+fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "Namespace"
"propagate_at_launch" = "true"
"value" = "cloudposse"
},
{
"additional_tag" = "yes"
"key" = "Stage"
"propagate_at_launch" = "true"
"value" = "test"
},
]
label3 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"id" = "starfish.uat.release.fire.water.earth.air"
"name" = "starfish"
"namespace" = "cloudposse"
"stage" = "release"
}
label3_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Starfish"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
}
}
label3_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "starfish"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
}
label3_tags = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
```
</details>
include:
- docs/targets.md
- docs/terraform.md
contributors:
- name: Erik Osterman
github: osterman
- name: Andriy Knysh
github: aknysh
- name: Igor Rodionov
github: goruha
- name: Sergey Vasilyev
github: s2504s
- name: Michael Pereira
github: MichaelPereira
- name: Jamie Nelson
github: Jamie-BitFlight
- name: Vladimir
github: SweetOps
- name: Daren Desjardins
github: darend
- name: Maarten van der Hoef
github: maartenvanderhoef
- name: Adam Tibbing
github: tibbing

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@ -0,0 +1,12 @@
<!-- markdownlint-disable -->
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
```
<!-- markdownlint-restore -->

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@ -0,0 +1,54 @@
<!-- markdownlint-disable -->
## Requirements
| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
## Providers
No provider.
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
## Outputs
| Name | Description |
|------|-------------|
| additional\_tag\_map | The merged additional\_tag\_map |
| attributes | List of attributes |
| context | Merged but otherwise unmodified input to this module, to be used as context input to other modules.<br>Note: this version will have null values as defaults, not the values actually used as defaults. |
| delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
| enabled | True if module is enabled, false otherwise |
| environment | Normalized environment |
| id | Disambiguated ID restricted to `id_length_limit` characters in total |
| id\_full | Disambiguated ID not restricted in length |
| id\_length\_limit | The id\_length\_limit actually used to create the ID, with `0` meaning unlimited |
| label\_order | The naming order actually used to create the ID |
| name | Normalized name |
| namespace | Normalized namespace |
| normalized\_context | Normalized context of this module |
| regex\_replace\_chars | The regex\_replace\_chars actually used to create the ID |
| stage | Normalized stage |
| tags | Normalized Tag map |
| tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
<!-- markdownlint-restore -->

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@ -0,0 +1,12 @@
namespace = "eg"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}

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@ -0,0 +1,216 @@
# DO NOT COPY THIS FILE
#
# This is a specially modified version of this file, since it is used to test
# the unpublished version of this module. Normally you should use a
# copy of the file as explained below.
#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "../.."
enabled = var.enabled
namespace = var.namespace
environment = var.environment
stage = var.stage
name = var.name
delimiter = var.delimiter
attributes = var.attributes
tags = var.tags
additional_tag_map = var.additional_tag_map
label_order = var.label_order
regex_replace_chars = var.regex_replace_chars
id_length_limit = var.id_length_limit
context = var.context
}
# Copy contents of cloudposse/terraform-null-label/variables.tf here
variable "context" {
type = object({
enabled = bool
namespace = string
environment = string
stage = string
name = string
delimiter = string
attributes = list(string)
tags = map(string)
additional_tag_map = map(string)
regex_replace_chars = string
label_order = list(string)
id_length_limit = number
label_key_case = string
label_value_case = string
})
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = var.context["label_key_case"] == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = var.context["label_value_case"] == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters.
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
context = module.this.context
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template {
id = aws_launch_template.default.id
version = "$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
################################
# Provider #
################################
provider "aws" {
region = "eu-west-1"
# Make it faster by skipping unneeded checks here
skip_get_ec2_platforms = true
skip_metadata_api_check = true
skip_region_validation = true
skip_credentials_validation = true
skip_requesting_account_id = true
}
##############################################################
# Data sources to get VPC, subnets and security group details
##############################################################
data "aws_vpc" "default" {
default = true
}
data "aws_subnet_ids" "all" {
vpc_id = data.aws_vpc.default.id
}
data "aws_security_group" "default" {
vpc_id = data.aws_vpc.default.id
name = "default"
}
data "aws_ami" "amazon_linux" {
most_recent = true
owners = ["amazon"]
filter {
name = "name"
values = [
"amzn-ami-hvm-*-x86_64-gp2",
]
}
filter {
name = "owner-alias"
values = [
"amazon",
]
}
}

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@ -0,0 +1,12 @@
# terraform-null-label example used here: Output list of tags applied in each format
output "tags_as_list_of_maps" {
value = module.label.tags_as_list_of_maps
}
output "tags" {
value = module.label.tags
}
output "id" {
value = module.label.id
}

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terraform {
required_version = ">= 0.13.0"
}

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namespace = "cp"
environment = "uw2"
stage = "prd"
name = "null-label"
delimiter = ""
id_length_limit = 6
label_key_case = "lower"
label_value_case = "upper"

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@ -0,0 +1,217 @@
# DO NOT COPY THIS FILE
#
# This is a specially modified version of this file, since it is used to test
# the unpublished version of this module. Normally you should use a
# copy of the file as explained below.
#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "../.."
enabled = var.enabled
namespace = var.namespace
environment = var.environment
stage = var.stage
name = var.name
delimiter = var.delimiter
attributes = var.attributes
tags = var.tags
additional_tag_map = var.additional_tag_map
label_order = var.label_order
regex_replace_chars = var.regex_replace_chars
id_length_limit = var.id_length_limit
label_key_case = var.label_key_case
label_value_case = var.label_value_case
context = var.context
}
# Copy contents of cloudposse/terraform-null-label/variables.tf here
variable "context" {
type = object({
enabled = bool
namespace = string
environment = string
stage = string
name = string
delimiter = string
attributes = list(string)
tags = map(string)
additional_tag_map = map(string)
regex_replace_chars = string
label_order = list(string)
id_length_limit = number
label_key_case = string
label_value_case = string
})
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = var.context["label_key_case"] == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = var.context["label_value_case"] == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters.
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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module "label1" {
source = "../../"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
output "label1" {
value = {
id = module.label1.id
name = module.label1.name
namespace = module.label1.namespace
stage = module.label1.stage
attributes = module.label1.attributes
delimiter = module.label1.delimiter
}
}
output "label1_tags" {
value = module.label1.tags
}
output "label1_context" {
value = module.label1.context
}
output "label1_normalized_context" {
value = module.label1.normalized_context
}

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module "label1t1" {
source = "../../"
id_length_limit = 28
context = module.label1.context
}
output "label1t1" {
value = {
id = module.label1t1.id
id_full = module.label1t1.id_full
}
}
output "label1t1_tags" {
value = module.label1t1.tags
}

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@ -0,0 +1,18 @@
module "label1t2" {
source = "../../"
id_length_limit = 29
context = module.label1.context
}
output "label1t2" {
value = {
id = module.label1t2.id
id_full = module.label1t2.id_full
}
}
output "label1t2_tags" {
value = module.label1t2.tags
}

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module "label2" {
source = "../../"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
regex_replace_chars = "/[^a-zA-Z0-9-+]/"
additional_tag_map = {
propagate_at_launch = "true"
additional_tag = "yes"
}
tags = {
"City" = "London"
"Environment" = "Public"
}
}
output "label2" {
value = {
id = module.label2.id
name = module.label2.name
namespace = module.label2.namespace
stage = module.label2.stage
attributes = module.label2.attributes
delimiter = module.label2.delimiter
}
}
output "label2_tags" {
value = module.label2.tags
}
output "label2_tags_as_list_of_maps" {
value = module.label2.tags_as_list_of_maps
}
output "label2_context" {
value = module.label2.context
}

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@ -0,0 +1,36 @@
module "label3c" {
source = "../../"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
regex_replace_chars = "/[^-a-zA-Z0-9.]/"
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
output "label3c" {
value = {
id = module.label3c.id
name = module.label3c.name
namespace = module.label3c.namespace
stage = module.label3c.stage
attributes = module.label3c.attributes
delimiter = module.label3c.delimiter
}
}
output "label3c_tags" {
value = module.label3c.tags
}
output "label3c_context" {
value = module.label3c.context
}
output "label3c_normalized_context" {
value = module.label3c.normalized_context
}

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@ -0,0 +1,36 @@
module "label3n" {
source = "../../"
name = "Starfish"
stage = "release"
context = module.label1.normalized_context
delimiter = "."
regex_replace_chars = "/[^-a-zA-Z0-9.]/"
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
output "label3n" {
value = {
id = module.label3n.id
name = module.label3n.name
namespace = module.label3n.namespace
stage = module.label3n.stage
attributes = module.label3n.attributes
delimiter = module.label3n.delimiter
}
}
output "label3n_tags" {
value = module.label3n.tags
}
output "label3n_context" {
value = module.label3n.context
}
output "label3n_normalized_context" {
value = module.label3n.normalized_context
}

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@ -0,0 +1,34 @@
module "label4" {
source = "../../"
namespace = "CloudPosse"
environment = "UAT"
name = "Example Cluster"
attributes = ["big", "fat", "honking", "cluster"]
delimiter = "-"
label_order = ["namespace", "stage", "environment", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
output "label4" {
value = {
id = module.label4.id
name = module.label4.name
namespace = module.label4.namespace
stage = module.label4.stage
attributes = module.label4.attributes
delimiter = module.label4.delimiter
}
}
output "label4_tags" {
value = module.label4.tags
}
output "label4_context" {
value = module.label4.context
}

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@ -0,0 +1,33 @@
module "label5" {
source = "../../"
enabled = false
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
label_order = ["namespace", "stage", "environment", "attributes"]
tags = {
}
}
output "label5" {
value = {
id = module.label5.id
name = module.label5.name
namespace = module.label5.namespace
stage = module.label5.stage
attributes = module.label5.attributes
delimiter = module.label5.delimiter
}
}
output "label5_tags" {
value = module.label5.tags
}
output "label5_context" {
value = module.label5.context
}

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@ -0,0 +1,20 @@
module "label6f" {
source = "../../"
delimiter = "~"
id_length_limit = 0
# Use values from tfvars
context = module.this.context
}
output "label6f" {
value = {
id = module.label6f.id
id_full = module.label6f.id_full
}
}
output "label6f_tags" {
value = module.label6f.tags
}

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@ -0,0 +1,19 @@
module "label6t" {
source = "../../"
# Use values from tfvars,
# specifically: complete.auto.tfvars
context = module.this.context
}
output "label6t" {
value = {
id = module.label6t.id
id_full = module.label6t.id_full
id_length_limit = module.this.context.id_length_limit
}
}
output "label6t_tags" {
value = module.label6t.tags
}

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@ -0,0 +1,44 @@
module "label7a" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
tags = {
}
}
module "label7" {
source = "../../"
attributes = ["nodegroup"]
context = module.label7a.context
}
output "label7" {
value = {
id = module.label7.id
name = module.label7.name
namespace = module.label7.namespace
stage = module.label7.stage
attributes = module.label7.attributes
delimiter = module.label7.delimiter
}
}
output "label7_id" {
value = module.label7.id
}
output "label7_attributes" {
value = module.label7.attributes
}
output "label7_context" {
value = module.label7.context
}

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@ -0,0 +1,44 @@
module "label8d" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8d_context" {
source = "../../"
context = module.label8d.context
}
output "label8d_context_id" {
value = module.label8d_context.id
}
output "label8d_context_context" {
value = module.label8d_context.context
}
output "label8d_context_tags" {
value = module.label8d_context.tags
}
output "label8d_id" {
value = module.label8d.id
}
output "label8d_context" {
value = module.label8d.context
}
output "label8d_tags" {
value = module.label8d.tags
}

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@ -0,0 +1,24 @@
module "label8dcd" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "x"
}
module "label8dcd_context" {
source = "../../"
context = module.label8dcd.context
}
output "label8dcd_context_id" {
value = module.label8dcd_context.id
}
output "label8dcd_id" {
value = module.label8dcd.id
}

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@ -0,0 +1,24 @@
module "label8dnd" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = ""
}
module "label8dnd_context" {
source = "../../"
context = module.label8dnd.context
}
output "label8dnd_context_id" {
value = module.label8dnd_context.id
}
output "label8dnd_id" {
value = module.label8dnd.id
}

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@ -0,0 +1,46 @@
module "label8l" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
label_key_case = "lower"
label_value_case = "lower"
tags = {
"kubernetes.io/cluster/" = "shared"
"upperTEST" = "testUPPER"
}
}
module "label8l_context" {
source = "../../"
context = module.label8l.context
}
output "label8l_context_id" {
value = module.label8l_context.id
}
output "label8l_context_context" {
value = module.label8l_context.context
}
output "label8l_context_tags" {
value = module.label8l_context.tags
}
output "label8l_id" {
value = module.label8l.id
}
output "label8l_context" {
value = module.label8l.context
}
output "label8l_tags" {
value = module.label8l.tags
}

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@ -0,0 +1,45 @@
module "label8n" {
source = "../../"
enabled = true
namespace = "EG"
environment = "demo"
name = "blue"
attributes = ["eks", "ClusteR"]
delimiter = "-"
label_value_case = "none"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8n_context" {
source = "../../"
context = module.label8n.context
}
output "label8n_context_id" {
value = module.label8n_context.id
}
output "label8n_context_context" {
value = module.label8n_context.context
}
output "label8n_context_tags" {
value = module.label8n_context.tags
}
output "label8n_id" {
value = module.label8n.id
}
output "label8n_context" {
value = module.label8n.context
}
output "label8n_tags" {
value = module.label8n.tags
}

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@ -0,0 +1,45 @@
module "label8t" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["EKS", "cluster"]
delimiter = "-"
label_key_case = "title"
label_value_case = "title"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8t_context" {
source = "../../"
context = module.label8t.context
}
output "label8t_context_id" {
value = module.label8t_context.id
}
output "label8t_context_context" {
value = module.label8t_context.context
}
output "label8t_context_tags" {
value = module.label8t_context.tags
}
output "label8t_id" {
value = module.label8t.id
}
output "label8t_context" {
value = module.label8t.context
}
output "label8t_tags" {
value = module.label8t.tags
}

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@ -0,0 +1,50 @@
module "label8u" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
label_key_case = "upper"
label_value_case = "upper"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8u_context" {
source = "../../"
context = module.label8u.context
}
output "label8u_context_id" {
value = module.label8u_context.id
}
output "label8u_context_context" {
value = module.label8u_context.context
}
// debug
output "label8u_context_normalized_context" {
value = module.label8u_context.normalized_context
}
output "label8u_context_tags" {
value = module.label8u_context.tags
}
output "label8u_id" {
value = module.label8u.id
}
output "label8u_context" {
value = module.label8u.context
}
output "label8u_tags" {
value = module.label8u.tags
}

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@ -0,0 +1,3 @@
terraform {
required_version = ">= 0.13.0"
}

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@ -1,3 +1,23 @@
#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "cloudposse/label/null"
version = "0.24.1" # requires Terraform >= 0.13.0
@ -180,5 +200,3 @@ variable "label_value_case" {
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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@ -0,0 +1,146 @@
locals {
defaults = {
label_order = ["namespace", "environment", "stage", "name", "attributes"]
regex_replace_chars = "/[^-a-zA-Z0-9]/"
delimiter = "-"
replacement = ""
id_length_limit = 0
id_hash_length = 5
label_key_case = "title"
label_value_case = "lower"
}
# So far, we have decided not to allow overriding replacement or id_hash_length
replacement = local.defaults.replacement
id_hash_length = local.defaults.id_hash_length
# The values provided by variables supersede the values inherited from the context object,
# except for tags and attributes which are merged.
input = {
# It would be nice to use coalesce here, but we cannot, because it
# is an error for all the arguments to coalesce to be empty.
enabled = var.enabled == null ? var.context.enabled : var.enabled
namespace = var.namespace == null ? var.context.namespace : var.namespace
environment = var.environment == null ? var.context.environment : var.environment
stage = var.stage == null ? var.context.stage : var.stage
name = var.name == null ? var.context.name : var.name
delimiter = var.delimiter == null ? var.context.delimiter : var.delimiter
# modules tack on attributes (passed by var) to the end of the list (passed by context)
attributes = compact(distinct(concat(coalesce(var.context.attributes, []), coalesce(var.attributes, []))))
tags = merge(var.context.tags, var.tags)
additional_tag_map = merge(var.context.additional_tag_map, var.additional_tag_map)
label_order = var.label_order == null ? var.context.label_order : var.label_order
regex_replace_chars = var.regex_replace_chars == null ? var.context.regex_replace_chars : var.regex_replace_chars
id_length_limit = var.id_length_limit == null ? var.context.id_length_limit : var.id_length_limit
label_key_case = var.label_key_case == null ? lookup(var.context, "label_key_case", null) : var.label_key_case
label_value_case = var.label_value_case == null ? lookup(var.context, "label_value_case", null) : var.label_value_case
}
enabled = local.input.enabled
regex_replace_chars = coalesce(local.input.regex_replace_chars, local.defaults.regex_replace_chars)
# string_label_names are names of inputs that are strings (not list of strings) used as labels
string_label_names = ["name", "namespace", "environment", "stage"]
normalized_labels = { for k in local.string_label_names : k =>
local.input[k] == null ? "" : replace(local.input[k], local.regex_replace_chars, local.replacement)
}
normalized_attributes = compact(distinct([for v in local.input.attributes : replace(v, local.regex_replace_chars, local.replacement)]))
formatted_labels = { for k in local.string_label_names : k => local.label_value_case == "none" ? local.normalized_labels[k] :
local.label_value_case == "title" ? title(lower(local.normalized_labels[k])) :
local.label_value_case == "upper" ? upper(local.normalized_labels[k]) : lower(local.normalized_labels[k])
}
attributes = compact(distinct([
for v in local.normalized_attributes : (local.label_value_case == "none" ? v :
local.label_value_case == "title" ? title(lower(v)) :
local.label_value_case == "upper" ? upper(v) : lower(v))
]))
name = local.formatted_labels["name"]
namespace = local.formatted_labels["namespace"]
environment = local.formatted_labels["environment"]
stage = local.formatted_labels["stage"]
delimiter = local.input.delimiter == null ? local.defaults.delimiter : local.input.delimiter
label_order = local.input.label_order == null ? local.defaults.label_order : coalescelist(local.input.label_order, local.defaults.label_order)
id_length_limit = local.input.id_length_limit == null ? local.defaults.id_length_limit : local.input.id_length_limit
label_key_case = local.input.label_key_case == null ? local.defaults.label_key_case : local.input.label_key_case
label_value_case = local.input.label_value_case == null ? local.defaults.label_value_case : local.input.label_value_case
additional_tag_map = merge(var.context.additional_tag_map, var.additional_tag_map)
tags = merge(local.generated_tags, local.input.tags)
tags_as_list_of_maps = flatten([
for key in keys(local.tags) : merge(
{
key = key
value = local.tags[key]
}, var.additional_tag_map)
])
tags_context = {
# For AWS we need `Name` to be disambiguated since it has a special meaning
name = local.id
namespace = local.namespace
environment = local.environment
stage = local.stage
attributes = local.id_context.attributes
}
generated_tags = {
for l in keys(local.tags_context) :
local.label_key_case == "upper" ? upper(l) : (
local.label_key_case == "lower" ? lower(l) : title(lower(l))
) => local.tags_context[l] if length(local.tags_context[l]) > 0
}
id_context = {
name = local.name
namespace = local.namespace
environment = local.environment
stage = local.stage
attributes = join(local.delimiter, local.attributes)
}
labels = [for l in local.label_order : local.id_context[l] if length(local.id_context[l]) > 0]
id_full = join(local.delimiter, local.labels)
# Create a truncated ID if needed
delimiter_length = length(local.delimiter)
# Calculate length of normal part of ID, leaving room for delimiter and hash
id_truncated_length_limit = local.id_length_limit - (local.id_hash_length + local.delimiter_length)
# Truncate the ID and ensure a single (not double) trailing delimiter
id_truncated = local.id_truncated_length_limit <= 0 ? "" : "${trimsuffix(substr(local.id_full, 0, local.id_truncated_length_limit), local.delimiter)}${local.delimiter}"
# Support usages that disallow numeric characters. Would prefer tr 0-9 q-z but Terraform does not support it.
id_hash_plus = "${md5(local.id_full)}qrstuvwxyz"
id_hash_case = local.label_value_case == "title" ? title(local.id_hash_plus) : local.label_value_case == "upper" ? upper(local.id_hash_plus) : local.label_value_case == "lower" ? lower(local.id_hash_plus) : local.id_hash_plus
id_hash = replace(local.id_hash_case, local.regex_replace_chars, local.replacement)
# Create the short ID by adding a hash to the end of the truncated ID
id_short = substr("${local.id_truncated}${local.id_hash}", 0, local.id_length_limit)
id = local.id_length_limit != 0 && length(local.id_full) > local.id_length_limit ? local.id_short : local.id_full
# Context of this label to pass to other label modules
output_context = {
enabled = local.enabled
name = local.name
namespace = local.namespace
environment = local.environment
stage = local.stage
delimiter = local.delimiter
attributes = local.attributes
tags = local.tags
additional_tag_map = local.additional_tag_map
label_order = local.label_order
regex_replace_chars = local.regex_replace_chars
id_length_limit = local.id_length_limit
label_key_case = local.label_key_case
label_value_case = local.label_value_case
}
}

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@ -0,0 +1,88 @@
output "id" {
value = local.enabled ? local.id : ""
description = "Disambiguated ID restricted to `id_length_limit` characters in total"
}
output "id_full" {
value = local.enabled ? local.id_full : ""
description = "Disambiguated ID not restricted in length"
}
output "enabled" {
value = local.enabled
description = "True if module is enabled, false otherwise"
}
output "namespace" {
value = local.enabled ? local.namespace : ""
description = "Normalized namespace"
}
output "environment" {
value = local.enabled ? local.environment : ""
description = "Normalized environment"
}
output "name" {
value = local.enabled ? local.name : ""
description = "Normalized name"
}
output "stage" {
value = local.enabled ? local.stage : ""
description = "Normalized stage"
}
output "delimiter" {
value = local.enabled ? local.delimiter : ""
description = "Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes`"
}
output "attributes" {
value = local.enabled ? local.attributes : []
description = "List of attributes"
}
output "tags" {
value = local.enabled ? local.tags : {}
description = "Normalized Tag map"
}
output "additional_tag_map" {
value = local.additional_tag_map
description = "The merged additional_tag_map"
}
output "label_order" {
value = local.label_order
description = "The naming order actually used to create the ID"
}
output "regex_replace_chars" {
value = local.regex_replace_chars
description = "The regex_replace_chars actually used to create the ID"
}
output "id_length_limit" {
value = local.id_length_limit
description = "The id_length_limit actually used to create the ID, with `0` meaning unlimited"
}
output "tags_as_list_of_maps" {
value = local.tags_as_list_of_maps
description = "Additional tags as a list of maps, which can be used in several AWS resources"
}
output "normalized_context" {
value = local.output_context
description = "Normalized context of this module"
}
output "context" {
value = local.input
description = <<-EOT
Merged but otherwise unmodified input to this module, to be used as context input to other modules.
Note: this version will have null values as defaults, not the values actually used as defaults.
EOT
}

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@ -0,0 +1,43 @@
TEST_HARNESS ?= https://github.com/cloudposse/test-harness.git
TEST_HARNESS_BRANCH ?= master
TEST_HARNESS_PATH = $(realpath .test-harness)
BATS_ARGS ?= --tap
BATS_LOG ?= test.log
# Define a macro to run the tests
define RUN_TESTS
@echo "Running tests in $(1)"
@cd $(1) && bats $(BATS_ARGS) $(addsuffix .bats,$(addprefix $(TEST_HARNESS_PATH)/test/terraform/,$(TESTS)))
endef
default: all
-include Makefile.*
## Provision the test-harnesss
.test-harness:
[ -d $@ ] || git clone --depth=1 -b $(TEST_HARNESS_BRANCH) $(TEST_HARNESS) $@
## Initialize the tests
init: .test-harness
## Install all dependencies (OS specific)
deps::
@exit 0
## Clean up the test harness
clean:
[ "$(TEST_HARNESS_PATH)" == "/" ] || rm -rf $(TEST_HARNESS_PATH)
## Run all tests
all: module examples/complete
## Run basic sanity checks against the module itself
module: export TESTS ?= installed lint get-modules module-pinning get-plugins provider-pinning validate terraform-docs input-descriptions output-descriptions
module: deps
$(call RUN_TESTS, ../)
## Run tests against example
examples/complete: export TESTS ?= installed lint get-modules get-plugins validate init plan apply
examples/complete: deps
$(call RUN_TESTS, ../$@)

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@ -0,0 +1,5 @@
ifneq (,$(wildcard /sbin/apk))
## Install all dependencies for alpine
deps:: init
@apk add --update terraform-docs@cloudposse json2hcl@cloudposse
endif

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@ -0,0 +1,30 @@
export TF_CLI_ARGS_init ?= -get-plugins=true
export TERRAFORM_VERSION ?= $(shell curl -s https://checkpoint-api.hashicorp.com/v1/check/terraform | jq -r -M '.current_version' | cut -d. -f1-2)
.DEFAULT_GOAL : all
.PHONY: all
## Default target
all: test
.PHONY : init
## Initialize tests
init:
@exit 0
.PHONY : test
## Run tests
test: init
go mod download
go test -v -timeout 60m -run TestExamplesComplete
## Run tests in docker container
docker/test:
docker run --name terratest --rm -it -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY -e AWS_SESSION_TOKEN -e GITHUB_TOKEN \
-e PATH="/usr/local/terraform/$(TERRAFORM_VERSION)/bin:/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" \
-v $(CURDIR)/../../:/module/ cloudposse/test-harness:latest -C /module/test/src test
.PHONY : clean
## Clean up files
clean:
rm -rf ../../examples/complete/*.tfstate*

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@ -0,0 +1,293 @@
package test
import (
"fmt"
"testing"
"github.com/gruntwork-io/terratest/modules/terraform"
"github.com/qdm12/reprint"
"github.com/stretchr/testify/assert"
)
type NLContext struct {
AdditionalTagMap map[string]string `json:"additional_tag_map"`
Attributes []string `json:"attributes"`
Delimiter interface{} `json:"delimiter"`
Enabled bool `json:"enabled"`
Environment interface{} `json:"environment"`
LabelOrder []string `json:"label_order"`
Name interface{} `json:"name"`
Namespace interface{} `json:"namespace"`
RegexReplaceChars interface{} `json:"regex_replace_chars"`
Stage interface{} `json:"stage"`
Tags map[string]string `json:"tags"`
}
// Test the Terraform module in examples/complete using Terratest.
func TestExamplesComplete(t *testing.T) {
t.Parallel()
terraformOptions := &terraform.Options{
// The path to where our Terraform code is located
TerraformDir: "../../examples/complete",
Upgrade: true,
}
// At the end of the test, run `terraform destroy` to clean up any resources that were created
defer terraform.Destroy(t, terraformOptions)
// This will run `terraform init` and `terraform apply` and fail the test if there are any errors
terraform.InitAndApply(t, terraformOptions)
expectedLabel1Context := NLContext{
Enabled: true,
Namespace: "CloudPosse",
Environment: "UAT",
Stage: "build",
Name: "Winston Churchroom",
Attributes: []string{"fire", "water", "earth", "air"},
Delimiter: "-",
LabelOrder: []string{"name", "environment", "stage", "attributes"},
Tags: map[string]string{
"City": "Dublin",
"Environment": "Private",
},
AdditionalTagMap: map[string]string{},
}
var expectedLabel1NormalizedContext NLContext
_ = reprint.FromTo(&expectedLabel1Context, &expectedLabel1NormalizedContext)
expectedLabel1NormalizedContext.Namespace = "cloudposse"
expectedLabel1NormalizedContext.Environment = "uat"
expectedLabel1NormalizedContext.Name = "winstonchurchroom"
expectedLabel1NormalizedContext.RegexReplaceChars = "/[^-a-zA-Z0-9]/"
expectedLabel1NormalizedContext.Tags = map[string]string{
"City": "Dublin",
"Environment": "Private",
"Namespace": "cloudposse",
"Stage": "build",
"Name": "winstonchurchroom-uat-build-fire-water-earth-air",
"Attributes": "fire-water-earth-air",
}
var label1NormalizedContext, label1Context NLContext
// Run `terraform output` to get the value of an output variable
label1 := terraform.OutputMap(t, terraformOptions, "label1")
label1Tags := terraform.OutputMap(t, terraformOptions, "label1_tags")
terraform.OutputStruct(t, terraformOptions, "label1_normalized_context", &label1NormalizedContext)
terraform.OutputStruct(t, terraformOptions, "label1_context", &label1Context)
// Verify we're getting back the outputs we expect
assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1["id"])
assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1Tags["Name"])
assert.Equal(t, "Dublin", label1Tags["City"])
assert.Equal(t, "Private", label1Tags["Environment"])
assert.Equal(t, expectedLabel1NormalizedContext, label1NormalizedContext)
assert.Equal(t, expectedLabel1Context, label1Context)
label1t1 := terraform.OutputMap(t, terraformOptions, "label1t1")
label1t1Tags := terraform.OutputMap(t, terraformOptions, "label1t1_tags")
assert.Equal(t, "winstonchurchroom-uat-6a0b34", label1t1["id"],
"Extra hash character should be added when trailing delimiter is removed")
assert.Equal(t, label1["id"], label1t1["id_full"], "id_full should not be truncated")
assert.Equal(t, label1t1["id"], label1t1Tags["Name"], "Name tag should match ID")
label1t2 := terraform.OutputMap(t, terraformOptions, "label1t2")
label1t2Tags := terraform.OutputMap(t, terraformOptions, "label1t2_tags")
assert.Equal(t, "winstonchurchroom-uat-b-6a0b3", label1t2["id"])
assert.Equal(t, label1t2["id"], label1t2Tags["Name"], "Name tag should match ID")
// Run `terraform output` to get the value of an output variable
label2 := terraform.OutputMap(t, terraformOptions, "label2")
label2Tags := terraform.OutputMap(t, terraformOptions, "label2_tags")
// Verify we're getting back the outputs we expect
assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2["id"])
assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2Tags["Name"])
assert.Equal(t, "London", label2Tags["City"])
assert.Equal(t, "Public", label2Tags["Environment"])
var expectedLabel3cContext, label3cContext NLContext
_ = reprint.FromTo(&expectedLabel1Context, &expectedLabel3cContext)
expectedLabel3cContext.Name = "Starfish"
expectedLabel3cContext.Stage = "release"
expectedLabel3cContext.Delimiter = "."
expectedLabel3cContext.RegexReplaceChars = "/[^-a-zA-Z0-9.]/"
expectedLabel3cContext.Tags["Eat"] = "Carrot"
expectedLabel3cContext.Tags["Animal"] = "Rabbit"
// Run `terraform output` to get the value of an output variable
label3c := terraform.OutputMap(t, terraformOptions, "label3c")
label3cTags := terraform.OutputMap(t, terraformOptions, "label3c_tags")
terraform.OutputStruct(t, terraformOptions, "label3c_context", &label3cContext)
// Verify we're getting back the outputs we expect
assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3c["id"])
assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3cTags["Name"])
assert.Equal(t, expectedLabel3cContext, label3cContext)
var expectedLabel3nContext, label3nContext NLContext
_ = reprint.FromTo(&expectedLabel1NormalizedContext, &expectedLabel3nContext)
expectedLabel3nContext.Name = "Starfish"
expectedLabel3nContext.Stage = "release"
expectedLabel3nContext.Delimiter = "."
expectedLabel3nContext.RegexReplaceChars = "/[^-a-zA-Z0-9.]/"
expectedLabel3nContext.Tags["Eat"] = "Carrot"
expectedLabel3nContext.Tags["Animal"] = "Rabbit"
// Run `terraform output` to get the value of an output variable
label3n := terraform.OutputMap(t, terraformOptions, "label3n")
label3nTags := terraform.OutputMap(t, terraformOptions, "label3n_tags")
terraform.OutputStruct(t, terraformOptions, "label3n_context", &label3nContext)
// Verify we're getting back the outputs we expect
assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3n["id"])
assert.Equal(t, label1Tags["Name"], label3nTags["Name"],
"Tag from label1 normalized context should overwrite label3n generated tag")
assert.Equal(t, expectedLabel3nContext, label3nContext)
// Run `terraform output` to get the value of an output variable
label4 := terraform.OutputMap(t, terraformOptions, "label4")
label4Tags := terraform.OutputMap(t, terraformOptions, "label4_tags")
// Verify we're getting back the outputs we expect
assert.Equal(t, "cloudposse-uat-big-fat-honking-cluster", label4["id"])
assert.Equal(t, "cloudposse-uat-big-fat-honking-cluster", label4Tags["Name"])
// Run `terraform output` to get the value of an output variable
label5 := terraform.OutputMap(t, terraformOptions, "label5")
// Verify we're getting back the outputs we expect
assert.Equal(t, "", label5["id"])
label6f := terraform.OutputMap(t, terraformOptions, "label6f")
label6fTags := terraform.OutputMap(t, terraformOptions, "label6f_tags")
// Test of setting var.label_key_case = "lower", var.label_value_case = "upper"
assert.Equal(t, "CP~UW2~PRD~NULL-LABEL", label6f["id_full"])
assert.Equal(t, label6f["id_full"], label6f["id"], "id should not be truncated")
assert.Equal(t, label6f["id"], label6fTags["name"], "Name tag should match ID")
label6t := terraform.OutputMap(t, terraformOptions, "label6t")
label6tTags := terraform.OutputMap(t, terraformOptions, "label6t_tags")
assert.Equal(t, "CPUW2PRDNULL-LABEL", label6t["id_full"])
assert.NotEqual(t, label6t["id_full"], label6t["id"], "id should be truncated")
assert.Equal(t, label6t["id"], label6tTags["name"], "Name tag should match ID")
assert.Equal(t, label6t["id_length_limit"], fmt.Sprintf("%d", len(label6t["id"])),
"Truncated ID length should equal length limit")
label7 := terraform.OutputMap(t, terraformOptions, "label7")
assert.Equal(t, "eg-demo-blue-cluster-nodegroup", label7["id"], "var.attributes should be appended after context.attributes")
// Verify that apply with `label_key_case=title`, `label_value_case=lower`, `delimiter=""` returns expected value of id, context id
label8dndID := terraform.Output(t, terraformOptions, "label8dnd_id")
label8dndContextID := terraform.Output(t, terraformOptions, "label8dnd_context_id")
assert.Equal(t, "egdemobluecluster", label8dndID)
assert.Equal(t, label8dndID, label8dndContextID, "ID and context ID should be equal")
// Verify that apply with `label_key_case=title`, `label_value_case=lower`, `delimiter="x"` returns expected value of id, context id
label8dcdID := terraform.Output(t, terraformOptions, "label8dcd_id")
label8dcdContextID := terraform.Output(t, terraformOptions, "label8dcd_context_id")
assert.Equal(t, "egxdemoxbluexcluster", label8dcdID)
assert.Equal(t, label8dcdID, label8dcdContextID, "ID and context ID should be equal")
// Verify that apply with `label_key_case=title` and `label_value_case=lower` returns expected values of id, tags, context tags
label8dExpectedTags := map[string]string{
"Attributes": "cluster",
"Environment": "demo",
"Name": "eg-demo-blue-cluster",
"Namespace": "eg",
"kubernetes.io/cluster/": "shared",
}
label8dID := terraform.Output(t, terraformOptions, "label8d_id")
label8dContextID := terraform.Output(t, terraformOptions, "label8d_context_id")
assert.Equal(t, "eg-demo-blue-cluster", label8dID)
assert.Equal(t, label8dID, label8dContextID, "ID and context ID should be equal")
label8dTags := terraform.OutputMap(t, terraformOptions, "label8d_tags")
label8dContextTags := terraform.OutputMap(t, terraformOptions, "label8d_context_tags")
assert.Exactly(t, label8dExpectedTags, label8dTags, "generated tags are different from expected")
assert.Exactly(t, label8dTags, label8dContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=lower` and `label_value_case=lower` returns expected values of id, tags, context tags
label8lExpectedTags := map[string]string{
"attributes": "cluster",
"environment": "demo",
"name": "eg-demo-blue-cluster",
"namespace": "eg",
"kubernetes.io/cluster/": "shared",
"upperTEST": "testUPPER",
}
label8lID := terraform.Output(t, terraformOptions, "label8l_id")
label8lContextID := terraform.Output(t, terraformOptions, "label8l_context_id")
assert.Equal(t, "eg-demo-blue-cluster", label8lID)
assert.Equal(t, label8lID, label8lContextID, "ID and context ID should be equal")
label8lTags := terraform.OutputMap(t, terraformOptions, "label8l_tags")
label8lContextTags := terraform.OutputMap(t, terraformOptions, "label8l_context_tags")
assert.Exactly(t, label8lExpectedTags, label8lTags, "generated tags are different from expected")
assert.Exactly(t, label8lTags, label8lContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=title` and `label_value_case=title` returns expected values of id, tags, context tags
label8tExpectedTags := map[string]string{
"Attributes": "Eks-Cluster",
"Environment": "Demo",
"Name": "Eg-Demo-Blue-Eks-Cluster",
"Namespace": "Eg",
"kubernetes.io/cluster/": "shared",
}
label8tID := terraform.Output(t, terraformOptions, "label8t_id")
label8tContextID := terraform.Output(t, terraformOptions, "label8t_context_id")
assert.Equal(t, "Eg-Demo-Blue-Eks-Cluster", label8tID)
assert.Equal(t, label8tID, label8tContextID, "ID and context ID should be equal")
label8tTags := terraform.OutputMap(t, terraformOptions, "label8t_tags")
label8tContextTags := terraform.OutputMap(t, terraformOptions, "label8t_context_tags")
assert.Exactly(t, label8tExpectedTags, label8tTags, "generated tags are different from expected")
assert.Exactly(t, label8tTags, label8tContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=upper` and `label_value_case=upper` returns expected values of id, tags, context tags
label8uExpectedTags := map[string]string{
"ATTRIBUTES": "CLUSTER",
"ENVIRONMENT": "DEMO",
"NAME": "EG-DEMO-BLUE-CLUSTER",
"NAMESPACE": "EG",
"kubernetes.io/cluster/": "shared",
}
label8uID := terraform.Output(t, terraformOptions, "label8u_id")
label8uContextID := terraform.Output(t, terraformOptions, "label8u_context_id")
assert.Equal(t, "EG-DEMO-BLUE-CLUSTER", label8uID)
assert.Equal(t, label8uID, label8uContextID, "ID and context ID should be equal")
label8uTags := terraform.OutputMap(t, terraformOptions, "label8u_tags")
label8uContextTags := terraform.OutputMap(t, terraformOptions, "label8u_context_tags")
assert.Exactly(t, label8uExpectedTags, label8uTags, "generated tags are different from expected")
assert.Exactly(t, label8uTags, label8uContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=title` and `label_value_case=none` returns expected values of id, tags, context tags
label8nExpectedTags := map[string]string{
"Attributes": "eks-ClusteR",
"Environment": "demo",
"Name": "EG-demo-blue-eks-ClusteR",
"Namespace": "EG",
"kubernetes.io/cluster/": "shared",
}
label8nID := terraform.Output(t, terraformOptions, "label8n_id")
label8nContextID := terraform.Output(t, terraformOptions, "label8n_context_id")
assert.Equal(t, "EG-demo-blue-eks-ClusteR", label8nID)
assert.Equal(t, label8nID, label8nContextID, "ID and context ID should be equal")
label8nTags := terraform.OutputMap(t, terraformOptions, "label8n_tags")
label8nContextTags := terraform.OutputMap(t, terraformOptions, "label8n_context_tags")
assert.Exactly(t, label8nExpectedTags, label8nTags, "generated tags are different from expected")
assert.Exactly(t, label8nTags, label8nContextTags, "tags and context tags should be equal")
}

View File

@ -0,0 +1,9 @@
module github.com/cloudposse/terraform-null-label
go 1.14
require (
github.com/gruntwork-io/terratest v0.31.1
github.com/qdm12/reprint v0.0.0-20200326205758-722754a53494
github.com/stretchr/testify v1.6.1
)

View File

@ -0,0 +1,595 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
github.com/Azure/azure-sdk-for-go v35.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/azure-sdk-for-go v38.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/azure-sdk-for-go v46.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
github.com/Azure/go-autorest/autorest v0.9.3/go.mod h1:GsRuLYvwzLjjjRoWEIyMUaYq8GNUx2nRB378IPt/1p0=
github.com/Azure/go-autorest/autorest v0.9.6/go.mod h1:/FALq9T/kS7b5J5qsQ+RSTUdAmGFqi0vUdVNNx8q630=
github.com/Azure/go-autorest/autorest v0.11.0/go.mod h1:JFgpikqFJ/MleTTxwepExTKnFUKKszPS8UavbQYUMuw=
github.com/Azure/go-autorest/autorest v0.11.5/go.mod h1:foo3aIXRQ90zFve3r0QiDsrjGDUwWhKl0ZOQy1CT14k=
github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod h1:8Z9fGy2MpX0PvDjB1pEgQTmVqjGhiHBW7RJJEciWzS0=
github.com/Azure/go-autorest/autorest/adal v0.8.0/go.mod h1:Z6vX6WXXuyieHAXwMj0S6HY6e6wcHn37qQMBQlvY3lc=
github.com/Azure/go-autorest/autorest/adal v0.8.1/go.mod h1:ZjhuQClTqx435SRJ2iMlOxPYt3d2C/T/7TiQCVZSn3Q=
github.com/Azure/go-autorest/autorest/adal v0.8.2/go.mod h1:ZjhuQClTqx435SRJ2iMlOxPYt3d2C/T/7TiQCVZSn3Q=
github.com/Azure/go-autorest/autorest/adal v0.9.0/go.mod h1:/c022QCutn2P7uY+/oQWWNcK9YU+MH96NgK+jErpbcg=
github.com/Azure/go-autorest/autorest/adal v0.9.2/go.mod h1:/3SMAM86bP6wC9Ev35peQDUeqFZBMH07vvUOmg4z/fE=
github.com/Azure/go-autorest/autorest/azure/auth v0.5.1/go.mod h1:ea90/jvmnAwDrSooLH4sRIehEPtG/EPUXavDh31MnA4=
github.com/Azure/go-autorest/autorest/azure/cli v0.4.0/go.mod h1:JljT387FplPzBA31vUcvsetLKF3pec5bdAxjVU4kI2s=
github.com/Azure/go-autorest/autorest/date v0.1.0/go.mod h1:plvfp3oPSKwf2DNjlBjWF/7vwR+cUD/ELuzDCXwHUVA=
github.com/Azure/go-autorest/autorest/date v0.2.0/go.mod h1:vcORJHLJEh643/Ioh9+vPmf1Ij9AEBM5FuBIXLmIy0g=
github.com/Azure/go-autorest/autorest/date v0.3.0/go.mod h1:BI0uouVdmngYNUzGWeSYnokU+TrmwEsOqdt8Y6sso74=
github.com/Azure/go-autorest/autorest/mocks v0.1.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxBee2F5Gr4kF2zd2J5cFRaIDN0=
github.com/Azure/go-autorest/autorest/mocks v0.3.0/go.mod h1:a8FDP3DYzQ4RYfVAxAN3SVSiiO77gL2j2ronKKP0syM=
github.com/Azure/go-autorest/autorest/mocks v0.4.0/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
github.com/Azure/go-autorest/autorest/mocks v0.4.1/go.mod h1:LTp+uSrOhSkaKrUy935gNZuuIPPVsHlr9DSOxSayd+k=
github.com/Azure/go-autorest/autorest/to v0.2.0/go.mod h1:GunWKJp1AEqgMaGLV+iocmRAJWqST1wQYhyyjXJ3SJc=
github.com/Azure/go-autorest/autorest/to v0.3.0/go.mod h1:MgwOyqaIuKdG4TL/2ywSsIWKAfJfgHDo8ObuUk3t5sA=
github.com/Azure/go-autorest/autorest/validation v0.1.0/go.mod h1:Ha3z/SqBeaalWQvokg3NZAlQTalVMtOIAs1aGK7G6u8=
github.com/Azure/go-autorest/autorest/validation v0.3.0/go.mod h1:yhLgjC0Wda5DYXl6JAsWyUe4KVNffhoDhG0zVzUMo3E=
github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
github.com/Azure/go-autorest/logger v0.2.0/go.mod h1:T9E3cAhj2VqvPOtCYAvby9aBXkZmbF5NWuPV8+WeEW8=
github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
github.com/GoogleCloudPlatform/k8s-cloud-provider v0.0.0-20190822182118-27a4ced34534/go.mod h1:iroGtC8B3tQiqtds1l+mgk/BBOrxbqjH+eUfFQYRc14=
github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
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github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
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github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
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github.com/vmware/govmomi v0.20.3/go.mod h1:URlwyTFZX72RmxtxuaFL2Uj3fD1JTvZdx59bHWk6aFU=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
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golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
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golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
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golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
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golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20191004110552-13f9640d40b9/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
golang.org/x/net v0.0.0-20200707034311-ab3426394381 h1:VXak5I6aEWmAXeQjA+QSZzlgNrpq9mjcfDemuexIKsU=
golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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golang.org/x/sys v0.0.0-20170830134202-bb24a47a89ea/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
k8s.io/api v0.17.0/go.mod h1:npsyOePkeP0CPwyGfXDHxvypiYMJxBWAMpQxCaJ4ZxI=
k8s.io/api v0.19.3/go.mod h1:VF+5FT1B74Pw3KxMdKyinLo+zynBaMBiAfGMuldcNDs=
k8s.io/apimachinery v0.17.0/go.mod h1:b9qmWdKlLuU9EBh+06BtLcSf/Mu89rWL33naRxs1uZg=
k8s.io/apimachinery v0.19.3/go.mod h1:DnPGDnARWFvYa3pMHgSxtbZb7gpzzAZ1pTfaUNDVlmA=
k8s.io/apiserver v0.17.0/go.mod h1:ABM+9x/prjINN6iiffRVNCBR2Wk7uY4z+EtEGZD48cg=
k8s.io/client-go v0.17.0/go.mod h1:TYgR6EUHs6k45hb6KWjVD6jFZvJV4gHDikv/It0xz+k=
k8s.io/client-go v0.19.3/go.mod h1:+eEMktZM+MG0KO+PTkci8xnbCZHvj9TqR6Q1XDUIJOM=
k8s.io/cloud-provider v0.17.0/go.mod h1:Ze4c3w2C0bRsjkBUoHpFi+qWe3ob1wI2/7cUn+YQIDE=
k8s.io/code-generator v0.0.0-20191121015212-c4c8f8345c7e/go.mod h1:DVmfPQgxQENqDIzVR2ddLXMH34qeszkKSdH/N+s+38s=
k8s.io/component-base v0.17.0/go.mod h1:rKuRAokNMY2nn2A6LP/MiwpoaMRHpfRnrPaUJJj1Yoc=
k8s.io/csi-translation-lib v0.17.0/go.mod h1:HEF7MEz7pOLJCnxabi45IPkhSsE/KmxPQksuCrHKWls=
k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/gengo v0.0.0-20190822140433-26a664648505/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6/go.mod h1:UuqjUnNftUyPE5H64/qeyjQoUZhGpeFDVdxjTeEVN2o=
k8s.io/legacy-cloud-providers v0.17.0/go.mod h1:DdzaepJ3RtRy+e5YhNtrCYwlgyK87j/5+Yfp0L9Syp8=
k8s.io/utils v0.0.0-20191114184206-e782cd3c129f/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
k8s.io/utils v0.0.0-20200729134348-d5654de09c73/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw=
modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06/go.mod h1:/ULNhyfzRopfcjskuui0cTITekDduZ7ycKN3oUT9R18=
sigs.k8s.io/structured-merge-diff/v4 v4.0.1/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

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@ -0,0 +1,157 @@
variable "context" {
type = any
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = lookup(var.context, "label_key_case", null) == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = lookup(var.context, "label_value_case", null) == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters (minimum 6).
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
validation {
condition = var.id_length_limit == null ? true : var.id_length_limit >= 6 || var.id_length_limit == 0
error_message = "The id_length_limit must be >= 6 if supplied (not null), or 0 for unlimited length."
}
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}

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@ -0,0 +1,3 @@
terraform {
required_version = ">= 0.13.0"
}

View File

@ -0,0 +1,201 @@
Apache License
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http://www.apache.org/licenses/
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5. Submission of Contributions. Unless You explicitly state otherwise,
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6. Trademarks. This License does not grant permission to use the trade
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on Your own behalf and on Your sole responsibility, not on behalf
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END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
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Copyright 2017-2020 Cloud Posse, LLC
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing, software
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

View File

@ -0,0 +1,10 @@
SHELL := /bin/bash
# List of targets the `readme` target should call before generating the readme
export README_DEPS ?= docs/targets.md docs/terraform.md
-include $(shell curl -sSL -o .build-harness "https://git.io/build-harness"; echo .build-harness)
## Lint terraform code
lint:
$(SELF) terraform/install terraform/get-modules terraform/get-plugins terraform/lint terraform/validate

View File

@ -0,0 +1,938 @@
<!-- markdownlint-disable -->
# terraform-null-label [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-null-label.svg)](https://github.com/cloudposse/terraform-null-label/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
<!-- markdownlint-restore -->
[![README Header][readme_header_img]][readme_header_link]
[![Cloud Posse][logo]](https://cpco.io/homepage)
<!--
** DO NOT EDIT THIS FILE
**
** This file was automatically generated by the `build-harness`.
** 1) Make all changes to `README.yaml`
** 2) Run `make init` (you only need to do this once)
** 3) Run`make readme` to rebuild this file.
**
** (We maintain HUNDREDS of open source projects. This is how we maintain our sanity.)
**
-->
Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
This module generates names using the following convention by default: `{namespace}-{environment}-{stage}-{name}-{attributes}`.
However, it is highly configurable. The delimiter (e.g. `-`) is configurable. Each label item is optional (although you must provide at least one).
So if you prefer the term `stage` to `environment`
you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
- If attributes are excluded but `namespace`, `stage`, and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`.
- If you want the attributes in a different order, you can specify that, too, with the `label_order` list.
- You can set a maximum length for the name, and the module will create a unique name that fits within that length.
- You can control the letter case of the generated labels which make up the `id` using `var.label_value_case`.
- The labels are also exported as tags. You can control the case of the tag names (keys) using `var.label_tag_case`.
It's recommended to use one `terraform-null-label` module for every unique resource of a given resource type.
For example, if you have 10 instances, there should be 10 different labels.
However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.
All [Cloud Posse modules](https://github.com/cloudposse?utf8=%E2%9C%93&q=terraform-&type=&language=) use this module to ensure resources can be instantiated multiple times within an account and without conflict.
**NOTE:** The `null` originally referred to the primary Terraform [provider](https://www.terraform.io/docs/providers/null/index.html) used in this module.
With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.
- Releases of this module from `0.23.0` onward only work with Terraform 0.13 or newer.
- Releases of this module from `0.12.0` through `0.22.1` support `HCL2` and are compatible with Terraform 0.12 or newer.
- Releases of this module prior to `0.12.0` are compatible with earlier versions of terraform like Terraform 0.11.
---
This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps.
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It's 100% Open Source and licensed under the [APACHE2](LICENSE).
We literally have [*hundreds of terraform modules*][terraform_modules] that are Open Source and well-maintained. Check them out!
## Security & Compliance [<img src="https://cloudposse.com/wp-content/uploads/2020/11/bridgecrew.svg" width="250" align="right" />](https://bridgecrew.io/)
Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.
| Benchmark | Description |
|--------|---------------|
| [![Infrastructure Security](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/general)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=INFRASTRUCTURE+SECURITY) | Infrastructure Security Compliance |
| [![CIS KUBERNETES](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_kubernetes)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+KUBERNETES+V1.5) | Center for Internet Security, KUBERNETES Compliance |
| [![CIS AWS](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_aws)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+AWS+V1.2) | Center for Internet Security, AWS Compliance |
| [![CIS AZURE](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_azure)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+AZURE+V1.1) | Center for Internet Security, AZURE Compliance |
| [![PCI-DSS](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/pci)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=PCI-DSS+V3.2) | Payment Card Industry Data Security Standards Compliance |
| [![NIST-800-53](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/nist)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=NIST-800-53) | National Institute of Standards and Technology Compliance |
| [![ISO27001](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/iso)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=ISO27001) | Information Security Management System, ISO/IEC 27001 Compliance |
| [![SOC2](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/soc2)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=SOC2)| Service Organization Control 2 Compliance |
| [![CIS GCP](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_gcp)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+GCP+V1.1) | Center for Internet Security, GCP Compliance |
| [![HIPAA](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/hipaa)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=HIPAA) | Health Insurance Portability and Accountability Compliance |
## Usage
**IMPORTANT:** We do not pin modules to versions in our examples because of the
difficulty of keeping the versions in the documentation in sync with the latest released versions.
We highly recommend that in your code you pin the version to the exact version you are
using so that your infrastructure remains stable, and update versions in a
systematic way so that they do not catch you by surprise.
Also, because of a bug in the Terraform registry ([hashicorp/terraform#21417](https://github.com/hashicorp/terraform/issues/21417)),
the registry shows many of our inputs as required when in fact they are optional.
The table below correctly indicates which inputs are required.
### Defaults
Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
The context object is a single object that contains all the input values for `terraform-null-label`.
However, each input value can also be specified individually by name as a standard Terraform variable,
and the value of those variables, when set to something other than `null`, will override the value
in the context object. In order to allow chaining of these objects, where the context object input to one
module is transformed and passed to the next module, all the variables default to `null` or empty collections.
The actual default values used when nothing is explicitly set are describe in the documentation below.
For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
`terraform-null-label` will actually use the default delimiter `-` (hyphen).
A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
future modules in the chain cannot reset the value back to the original default. Insted, the new setting
becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
be overwritten.
### Simple Example
```hcl
module "eg_prod_bastion_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["public"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
```
This will create an `id` with the value of `eg-prod-bastion-public` because when generating `id`, the default order is `namespace`, `environment`, `stage`, `name`, `attributes`
(you can override it by using the `label_order` variable, see [Advanced Example 3](#advanced-example-3)).
Now reference the label when creating an instance:
```hcl
resource "aws_instance" "eg_prod_bastion_public" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_label.tags
}
```
Or define a security group:
```hcl
resource "aws_security_group" "eg_prod_bastion_public" {
vpc_id = var.vpc_id
name = module.eg_prod_bastion_label.id
tags = module.eg_prod_bastion_label.tags
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
```
### Advanced Example
Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
<details><summary>Click to show</summary>
```hcl
module "eg_prod_bastion_abc_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["abc"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_abc" {
name = module.eg_prod_bastion_abc_label.id
tags = module.eg_prod_bastion_abc_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_abc" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_abc_label.tags
  vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}
module "eg_prod_bastion_xyz_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["xyz"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_xyz" {
name = module.eg_prod_bastion_xyz_label.id
tags = module.eg_prod_bastion_xyz_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_xyz" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_xyz_label.tags
vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}
```
</details>
### Advanced Example 2
Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
<details><summary>Click to show</summary>
```hcl
tags = [
{
key = Name,
propagate_at_launch = 1,
value = namespace-stage-name
},
{
key = Namespace,
propagate_at_launch = 1,
value = namespace
},
{
key = Stage,
propagate_at_launch = 1,
value = stage
}
]
```
Autoscaling group using propagating tagging below (full example: [autoscalinggroup](examples/autoscalinggroup/main.tf))
```hcl
################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
namespace = "cp"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template = {
id = "aws_launch_template.default.id
version = "$$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
```
</details>
### Advanced Example 3
See [complete example](./examples/complete) for even more examples.
This example shows how you can pass the `context` output of one label module to the next label_module,
allowing you to create one label that has the base set of values, and then creating every extra label
as a derivative of that.
<details><summary>Click to show</summary>
```hcl
module "label1" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
module "label2" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
tags = {
"City" = "London"
"Environment" = "Public"
}
}
module "label3" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
```
This creates label outputs like this:
```hcl
label1 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"id" = "winstonchurchroom-uat-build-fire-water-earth-air"
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"stage" = "build"
}
label1_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Winston Churchroom"
"namespace" = "CloudPosse"
"stage" = "build"
"tags" = {
"City" = "Dublin"
"Environment" = "Private"
}
}
label1_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9]/"
"stage" = "build"
"tags" = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
}
label1_tags = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
label2 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"id" = "charlie+uat+test+fire+water+earth+air"
"name" = "charlie"
"namespace" = "cloudposse"
"stage" = "test"
}
label2_context = {
"additional_tag_map" = {
"additional_tag" = "yes"
"propagate_at_launch" = "true"
}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Charlie"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
"stage" = "test"
"tags" = {
"City" = "London"
"Environment" = "Public"
}
}
label2_tags = {
"Attributes" = "fire+water+earth+air"
"City" = "London"
"Environment" = "Public"
"Name" = "charlie+uat+test+fire+water+earth+air"
"Namespace" = "cloudposse"
"Stage" = "test"
}
label2_tags_as_list_of_maps = [
{
"additional_tag" = "yes"
"key" = "Attributes"
"propagate_at_launch" = "true"
"value" = "fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "City"
"propagate_at_launch" = "true"
"value" = "London"
},
{
"additional_tag" = "yes"
"key" = "Environment"
"propagate_at_launch" = "true"
"value" = "Public"
},
{
"additional_tag" = "yes"
"key" = "Name"
"propagate_at_launch" = "true"
"value" = "charlie+uat+test+fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "Namespace"
"propagate_at_launch" = "true"
"value" = "cloudposse"
},
{
"additional_tag" = "yes"
"key" = "Stage"
"propagate_at_launch" = "true"
"value" = "test"
},
]
label3 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"id" = "starfish.uat.release.fire.water.earth.air"
"name" = "starfish"
"namespace" = "cloudposse"
"stage" = "release"
}
label3_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Starfish"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
}
}
label3_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "starfish"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
}
label3_tags = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
```
</details>
<!-- markdownlint-disable -->
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
```
<!-- markdownlint-restore -->
<!-- markdownlint-disable -->
## Requirements
| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
## Providers
No provider.
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
## Outputs
| Name | Description |
|------|-------------|
| additional\_tag\_map | The merged additional\_tag\_map |
| attributes | List of attributes |
| context | Merged but otherwise unmodified input to this module, to be used as context input to other modules.<br>Note: this version will have null values as defaults, not the values actually used as defaults. |
| delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
| enabled | True if module is enabled, false otherwise |
| environment | Normalized environment |
| id | Disambiguated ID restricted to `id_length_limit` characters in total |
| id\_full | Disambiguated ID not restricted in length |
| id\_length\_limit | The id\_length\_limit actually used to create the ID, with `0` meaning unlimited |
| label\_order | The naming order actually used to create the ID |
| name | Normalized name |
| namespace | Normalized namespace |
| normalized\_context | Normalized context of this module |
| regex\_replace\_chars | The regex\_replace\_chars actually used to create the ID |
| stage | Normalized stage |
| tags | Normalized Tag map |
| tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
<!-- markdownlint-restore -->
## Share the Love
Like this project? Please give it a ★ on [our GitHub](https://github.com/cloudposse/terraform-null-label)! (it helps us **a lot**)
Are you using this project or any of our other projects? Consider [leaving a testimonial][testimonial]. =)
## Related Projects
Check out these related projects.
- [terraform-terraform-label](https://github.com/cloudposse/terraform-terraform-label) - Terraform Module to define a consistent naming convention by (namespace, environment, stage, name, [attributes])
## Help
**Got a question?** We got answers.
File a GitHub [issue](https://github.com/cloudposse/terraform-null-label/issues), send us an [email][email] or join our [Slack Community][slack].
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## DevOps Accelerator for Startups
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## Contributing
### Bug Reports & Feature Requests
Please use the [issue tracker](https://github.com/cloudposse/terraform-null-label/issues) to report any bugs or file feature requests.
### Developing
If you are interested in being a contributor and want to get involved in developing this project or [help out](https://cpco.io/help-out) with our other projects, we would love to hear from you! Shoot us an [email][email].
In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
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4. **Push** your work back up to your fork
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**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
## Copyright
Copyright © 2017-2021 [Cloud Posse, LLC](https://cpco.io/copyright)
## License
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See [LICENSE](LICENSE) for full details.
```text
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
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with the License. You may obtain a copy of the License at
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Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
```
## Trademarks
All other trademarks referenced herein are the property of their respective owners.
## About
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Check out [our other projects][github], [follow us on twitter][twitter], [apply for a job][jobs], or [hire us][hire] to help with your cloud strategy and implementation.
### Contributors
<!-- markdownlint-disable -->
| [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Igor Rodionov][goruha_avatar]][goruha_homepage]<br/>[Igor Rodionov][goruha_homepage] | [![Sergey Vasilyev][s2504s_avatar]][s2504s_homepage]<br/>[Sergey Vasilyev][s2504s_homepage] | [![Michael Pereira][MichaelPereira_avatar]][MichaelPereira_homepage]<br/>[Michael Pereira][MichaelPereira_homepage] | [![Jamie Nelson][Jamie-BitFlight_avatar]][Jamie-BitFlight_homepage]<br/>[Jamie Nelson][Jamie-BitFlight_homepage] | [![Vladimir][SweetOps_avatar]][SweetOps_homepage]<br/>[Vladimir][SweetOps_homepage] | [![Daren Desjardins][darend_avatar]][darend_homepage]<br/>[Daren Desjardins][darend_homepage] | [![Maarten van der Hoef][maartenvanderhoef_avatar]][maartenvanderhoef_homepage]<br/>[Maarten van der Hoef][maartenvanderhoef_homepage] | [![Adam Tibbing][tibbing_avatar]][tibbing_homepage]<br/>[Adam Tibbing][tibbing_homepage] |
|---|---|---|---|---|---|---|---|---|---|
<!-- markdownlint-restore -->
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View File

@ -0,0 +1,618 @@
name: terraform-null-label
tags:
- aws
- terraform
- terraform-modules
- naming-convention
- name
- namespace
- stage
categories:
- terraform-modules/supported
license: APACHE2
github_repo: cloudposse/terraform-null-label
badges:
- name: Latest Release
image: https://img.shields.io/github/release/cloudposse/terraform-null-label.svg
url: https://github.com/cloudposse/terraform-null-label/releases/latest
- name: Slack Community
image: https://slack.cloudposse.com/badge.svg
url: https://slack.cloudposse.com
related:
- name: terraform-terraform-label
description: Terraform Module to define a consistent naming convention by (namespace,
environment, stage, name, [attributes])
url: https://github.com/cloudposse/terraform-terraform-label
description: |-
Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
This module generates names using the following convention by default: `{namespace}-{environment}-{stage}-{name}-{attributes}`.
However, it is highly configurable. The delimiter (e.g. `-`) is configurable. Each label item is optional (although you must provide at least one).
So if you prefer the term `stage` to `environment`
you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
- If attributes are excluded but `namespace`, `stage`, and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`.
- If you want the attributes in a different order, you can specify that, too, with the `label_order` list.
- You can set a maximum length for the name, and the module will create a unique name that fits within that length.
- You can control the letter case of the generated labels which make up the `id` using `var.label_value_case`.
- The labels are also exported as tags. You can control the case of the tag names (keys) using `var.label_tag_case`.
It's recommended to use one `terraform-null-label` module for every unique resource of a given resource type.
For example, if you have 10 instances, there should be 10 different labels.
However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.
All [Cloud Posse modules](https://github.com/cloudposse?utf8=%E2%9C%93&q=terraform-&type=&language=) use this module to ensure resources can be instantiated multiple times within an account and without conflict.
**NOTE:** The `null` originally referred to the primary Terraform [provider](https://www.terraform.io/docs/providers/null/index.html) used in this module.
With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.
- Releases of this module from `0.23.0` onward only work with Terraform 0.13 or newer.
- Releases of this module from `0.12.0` through `0.22.1` support `HCL2` and are compatible with Terraform 0.12 or newer.
- Releases of this module prior to `0.12.0` are compatible with earlier versions of terraform like Terraform 0.11.
usage: |-
### Defaults
Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
The context object is a single object that contains all the input values for `terraform-null-label`.
However, each input value can also be specified individually by name as a standard Terraform variable,
and the value of those variables, when set to something other than `null`, will override the value
in the context object. In order to allow chaining of these objects, where the context object input to one
module is transformed and passed to the next module, all the variables default to `null` or empty collections.
The actual default values used when nothing is explicitly set are describe in the documentation below.
For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
`terraform-null-label` will actually use the default delimiter `-` (hyphen).
A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
future modules in the chain cannot reset the value back to the original default. Insted, the new setting
becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
be overwritten.
### Simple Example
```hcl
module "eg_prod_bastion_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["public"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
```
This will create an `id` with the value of `eg-prod-bastion-public` because when generating `id`, the default order is `namespace`, `environment`, `stage`, `name`, `attributes`
(you can override it by using the `label_order` variable, see [Advanced Example 3](#advanced-example-3)).
Now reference the label when creating an instance:
```hcl
resource "aws_instance" "eg_prod_bastion_public" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_label.tags
}
```
Or define a security group:
```hcl
resource "aws_security_group" "eg_prod_bastion_public" {
vpc_id = var.vpc_id
name = module.eg_prod_bastion_label.id
tags = module.eg_prod_bastion_label.tags
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
```
### Advanced Example
Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
<details><summary>Click to show</summary>
```hcl
module "eg_prod_bastion_abc_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["abc"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_abc" {
name = module.eg_prod_bastion_abc_label.id
tags = module.eg_prod_bastion_abc_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_abc" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_abc_label.tags
  vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}
module "eg_prod_bastion_xyz_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["xyz"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_xyz" {
name = module.eg_prod_bastion_xyz_label.id
tags = module.eg_prod_bastion_xyz_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_xyz" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_xyz_label.tags
vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}
```
</details>
### Advanced Example 2
Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
<details><summary>Click to show</summary>
```hcl
tags = [
{
key = Name,
propagate_at_launch = 1,
value = namespace-stage-name
},
{
key = Namespace,
propagate_at_launch = 1,
value = namespace
},
{
key = Stage,
propagate_at_launch = 1,
value = stage
}
]
```
Autoscaling group using propagating tagging below (full example: [autoscalinggroup](examples/autoscalinggroup/main.tf))
```hcl
################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
namespace = "cp"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template = {
id = "aws_launch_template.default.id
version = "$$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
```
</details>
### Advanced Example 3
See [complete example](./examples/complete) for even more examples.
This example shows how you can pass the `context` output of one label module to the next label_module,
allowing you to create one label that has the base set of values, and then creating every extra label
as a derivative of that.
<details><summary>Click to show</summary>
```hcl
module "label1" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
module "label2" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
tags = {
"City" = "London"
"Environment" = "Public"
}
}
module "label3" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
```
This creates label outputs like this:
```hcl
label1 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"id" = "winstonchurchroom-uat-build-fire-water-earth-air"
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"stage" = "build"
}
label1_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Winston Churchroom"
"namespace" = "CloudPosse"
"stage" = "build"
"tags" = {
"City" = "Dublin"
"Environment" = "Private"
}
}
label1_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9]/"
"stage" = "build"
"tags" = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
}
label1_tags = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
label2 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"id" = "charlie+uat+test+fire+water+earth+air"
"name" = "charlie"
"namespace" = "cloudposse"
"stage" = "test"
}
label2_context = {
"additional_tag_map" = {
"additional_tag" = "yes"
"propagate_at_launch" = "true"
}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Charlie"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
"stage" = "test"
"tags" = {
"City" = "London"
"Environment" = "Public"
}
}
label2_tags = {
"Attributes" = "fire+water+earth+air"
"City" = "London"
"Environment" = "Public"
"Name" = "charlie+uat+test+fire+water+earth+air"
"Namespace" = "cloudposse"
"Stage" = "test"
}
label2_tags_as_list_of_maps = [
{
"additional_tag" = "yes"
"key" = "Attributes"
"propagate_at_launch" = "true"
"value" = "fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "City"
"propagate_at_launch" = "true"
"value" = "London"
},
{
"additional_tag" = "yes"
"key" = "Environment"
"propagate_at_launch" = "true"
"value" = "Public"
},
{
"additional_tag" = "yes"
"key" = "Name"
"propagate_at_launch" = "true"
"value" = "charlie+uat+test+fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "Namespace"
"propagate_at_launch" = "true"
"value" = "cloudposse"
},
{
"additional_tag" = "yes"
"key" = "Stage"
"propagate_at_launch" = "true"
"value" = "test"
},
]
label3 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"id" = "starfish.uat.release.fire.water.earth.air"
"name" = "starfish"
"namespace" = "cloudposse"
"stage" = "release"
}
label3_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Starfish"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
}
}
label3_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "starfish"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
}
label3_tags = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
```
</details>
include:
- docs/targets.md
- docs/terraform.md
contributors:
- name: Erik Osterman
github: osterman
- name: Andriy Knysh
github: aknysh
- name: Igor Rodionov
github: goruha
- name: Sergey Vasilyev
github: s2504s
- name: Michael Pereira
github: MichaelPereira
- name: Jamie Nelson
github: Jamie-BitFlight
- name: Vladimir
github: SweetOps
- name: Daren Desjardins
github: darend
- name: Maarten van der Hoef
github: maartenvanderhoef
- name: Adam Tibbing
github: tibbing

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@ -0,0 +1,12 @@
<!-- markdownlint-disable -->
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
```
<!-- markdownlint-restore -->

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@ -0,0 +1,54 @@
<!-- markdownlint-disable -->
## Requirements
| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
## Providers
No provider.
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
## Outputs
| Name | Description |
|------|-------------|
| additional\_tag\_map | The merged additional\_tag\_map |
| attributes | List of attributes |
| context | Merged but otherwise unmodified input to this module, to be used as context input to other modules.<br>Note: this version will have null values as defaults, not the values actually used as defaults. |
| delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
| enabled | True if module is enabled, false otherwise |
| environment | Normalized environment |
| id | Disambiguated ID restricted to `id_length_limit` characters in total |
| id\_full | Disambiguated ID not restricted in length |
| id\_length\_limit | The id\_length\_limit actually used to create the ID, with `0` meaning unlimited |
| label\_order | The naming order actually used to create the ID |
| name | Normalized name |
| namespace | Normalized namespace |
| normalized\_context | Normalized context of this module |
| regex\_replace\_chars | The regex\_replace\_chars actually used to create the ID |
| stage | Normalized stage |
| tags | Normalized Tag map |
| tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
<!-- markdownlint-restore -->

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@ -0,0 +1,12 @@
namespace = "eg"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}

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@ -0,0 +1,216 @@
# DO NOT COPY THIS FILE
#
# This is a specially modified version of this file, since it is used to test
# the unpublished version of this module. Normally you should use a
# copy of the file as explained below.
#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "../.."
enabled = var.enabled
namespace = var.namespace
environment = var.environment
stage = var.stage
name = var.name
delimiter = var.delimiter
attributes = var.attributes
tags = var.tags
additional_tag_map = var.additional_tag_map
label_order = var.label_order
regex_replace_chars = var.regex_replace_chars
id_length_limit = var.id_length_limit
context = var.context
}
# Copy contents of cloudposse/terraform-null-label/variables.tf here
variable "context" {
type = object({
enabled = bool
namespace = string
environment = string
stage = string
name = string
delimiter = string
attributes = list(string)
tags = map(string)
additional_tag_map = map(string)
regex_replace_chars = string
label_order = list(string)
id_length_limit = number
label_key_case = string
label_value_case = string
})
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = var.context["label_key_case"] == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = var.context["label_value_case"] == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters.
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
context = module.this.context
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template {
id = aws_launch_template.default.id
version = "$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
################################
# Provider #
################################
provider "aws" {
region = "eu-west-1"
# Make it faster by skipping unneeded checks here
skip_get_ec2_platforms = true
skip_metadata_api_check = true
skip_region_validation = true
skip_credentials_validation = true
skip_requesting_account_id = true
}
##############################################################
# Data sources to get VPC, subnets and security group details
##############################################################
data "aws_vpc" "default" {
default = true
}
data "aws_subnet_ids" "all" {
vpc_id = data.aws_vpc.default.id
}
data "aws_security_group" "default" {
vpc_id = data.aws_vpc.default.id
name = "default"
}
data "aws_ami" "amazon_linux" {
most_recent = true
owners = ["amazon"]
filter {
name = "name"
values = [
"amzn-ami-hvm-*-x86_64-gp2",
]
}
filter {
name = "owner-alias"
values = [
"amazon",
]
}
}

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@ -0,0 +1,12 @@
# terraform-null-label example used here: Output list of tags applied in each format
output "tags_as_list_of_maps" {
value = module.label.tags_as_list_of_maps
}
output "tags" {
value = module.label.tags
}
output "id" {
value = module.label.id
}

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terraform {
required_version = ">= 0.13.0"
}

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@ -0,0 +1,10 @@
namespace = "cp"
environment = "uw2"
stage = "prd"
name = "null-label"
delimiter = ""
id_length_limit = 6
label_key_case = "lower"
label_value_case = "upper"

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@ -0,0 +1,217 @@
# DO NOT COPY THIS FILE
#
# This is a specially modified version of this file, since it is used to test
# the unpublished version of this module. Normally you should use a
# copy of the file as explained below.
#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "../.."
enabled = var.enabled
namespace = var.namespace
environment = var.environment
stage = var.stage
name = var.name
delimiter = var.delimiter
attributes = var.attributes
tags = var.tags
additional_tag_map = var.additional_tag_map
label_order = var.label_order
regex_replace_chars = var.regex_replace_chars
id_length_limit = var.id_length_limit
label_key_case = var.label_key_case
label_value_case = var.label_value_case
context = var.context
}
# Copy contents of cloudposse/terraform-null-label/variables.tf here
variable "context" {
type = object({
enabled = bool
namespace = string
environment = string
stage = string
name = string
delimiter = string
attributes = list(string)
tags = map(string)
additional_tag_map = map(string)
regex_replace_chars = string
label_order = list(string)
id_length_limit = number
label_key_case = string
label_value_case = string
})
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = var.context["label_key_case"] == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = var.context["label_value_case"] == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters.
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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module "label1" {
source = "../../"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
output "label1" {
value = {
id = module.label1.id
name = module.label1.name
namespace = module.label1.namespace
stage = module.label1.stage
attributes = module.label1.attributes
delimiter = module.label1.delimiter
}
}
output "label1_tags" {
value = module.label1.tags
}
output "label1_context" {
value = module.label1.context
}
output "label1_normalized_context" {
value = module.label1.normalized_context
}

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module "label1t1" {
source = "../../"
id_length_limit = 28
context = module.label1.context
}
output "label1t1" {
value = {
id = module.label1t1.id
id_full = module.label1t1.id_full
}
}
output "label1t1_tags" {
value = module.label1t1.tags
}

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module "label1t2" {
source = "../../"
id_length_limit = 29
context = module.label1.context
}
output "label1t2" {
value = {
id = module.label1t2.id
id_full = module.label1t2.id_full
}
}
output "label1t2_tags" {
value = module.label1t2.tags
}

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module "label2" {
source = "../../"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
regex_replace_chars = "/[^a-zA-Z0-9-+]/"
additional_tag_map = {
propagate_at_launch = "true"
additional_tag = "yes"
}
tags = {
"City" = "London"
"Environment" = "Public"
}
}
output "label2" {
value = {
id = module.label2.id
name = module.label2.name
namespace = module.label2.namespace
stage = module.label2.stage
attributes = module.label2.attributes
delimiter = module.label2.delimiter
}
}
output "label2_tags" {
value = module.label2.tags
}
output "label2_tags_as_list_of_maps" {
value = module.label2.tags_as_list_of_maps
}
output "label2_context" {
value = module.label2.context
}

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module "label3c" {
source = "../../"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
regex_replace_chars = "/[^-a-zA-Z0-9.]/"
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
output "label3c" {
value = {
id = module.label3c.id
name = module.label3c.name
namespace = module.label3c.namespace
stage = module.label3c.stage
attributes = module.label3c.attributes
delimiter = module.label3c.delimiter
}
}
output "label3c_tags" {
value = module.label3c.tags
}
output "label3c_context" {
value = module.label3c.context
}
output "label3c_normalized_context" {
value = module.label3c.normalized_context
}

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module "label3n" {
source = "../../"
name = "Starfish"
stage = "release"
context = module.label1.normalized_context
delimiter = "."
regex_replace_chars = "/[^-a-zA-Z0-9.]/"
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
output "label3n" {
value = {
id = module.label3n.id
name = module.label3n.name
namespace = module.label3n.namespace
stage = module.label3n.stage
attributes = module.label3n.attributes
delimiter = module.label3n.delimiter
}
}
output "label3n_tags" {
value = module.label3n.tags
}
output "label3n_context" {
value = module.label3n.context
}
output "label3n_normalized_context" {
value = module.label3n.normalized_context
}

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module "label4" {
source = "../../"
namespace = "CloudPosse"
environment = "UAT"
name = "Example Cluster"
attributes = ["big", "fat", "honking", "cluster"]
delimiter = "-"
label_order = ["namespace", "stage", "environment", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
output "label4" {
value = {
id = module.label4.id
name = module.label4.name
namespace = module.label4.namespace
stage = module.label4.stage
attributes = module.label4.attributes
delimiter = module.label4.delimiter
}
}
output "label4_tags" {
value = module.label4.tags
}
output "label4_context" {
value = module.label4.context
}

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module "label5" {
source = "../../"
enabled = false
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
label_order = ["namespace", "stage", "environment", "attributes"]
tags = {
}
}
output "label5" {
value = {
id = module.label5.id
name = module.label5.name
namespace = module.label5.namespace
stage = module.label5.stage
attributes = module.label5.attributes
delimiter = module.label5.delimiter
}
}
output "label5_tags" {
value = module.label5.tags
}
output "label5_context" {
value = module.label5.context
}

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module "label6f" {
source = "../../"
delimiter = "~"
id_length_limit = 0
# Use values from tfvars
context = module.this.context
}
output "label6f" {
value = {
id = module.label6f.id
id_full = module.label6f.id_full
}
}
output "label6f_tags" {
value = module.label6f.tags
}

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module "label6t" {
source = "../../"
# Use values from tfvars,
# specifically: complete.auto.tfvars
context = module.this.context
}
output "label6t" {
value = {
id = module.label6t.id
id_full = module.label6t.id_full
id_length_limit = module.this.context.id_length_limit
}
}
output "label6t_tags" {
value = module.label6t.tags
}

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module "label7a" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
tags = {
}
}
module "label7" {
source = "../../"
attributes = ["nodegroup"]
context = module.label7a.context
}
output "label7" {
value = {
id = module.label7.id
name = module.label7.name
namespace = module.label7.namespace
stage = module.label7.stage
attributes = module.label7.attributes
delimiter = module.label7.delimiter
}
}
output "label7_id" {
value = module.label7.id
}
output "label7_attributes" {
value = module.label7.attributes
}
output "label7_context" {
value = module.label7.context
}

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module "label8d" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8d_context" {
source = "../../"
context = module.label8d.context
}
output "label8d_context_id" {
value = module.label8d_context.id
}
output "label8d_context_context" {
value = module.label8d_context.context
}
output "label8d_context_tags" {
value = module.label8d_context.tags
}
output "label8d_id" {
value = module.label8d.id
}
output "label8d_context" {
value = module.label8d.context
}
output "label8d_tags" {
value = module.label8d.tags
}

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module "label8dcd" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "x"
}
module "label8dcd_context" {
source = "../../"
context = module.label8dcd.context
}
output "label8dcd_context_id" {
value = module.label8dcd_context.id
}
output "label8dcd_id" {
value = module.label8dcd.id
}

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module "label8dnd" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = ""
}
module "label8dnd_context" {
source = "../../"
context = module.label8dnd.context
}
output "label8dnd_context_id" {
value = module.label8dnd_context.id
}
output "label8dnd_id" {
value = module.label8dnd.id
}

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module "label8l" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
label_key_case = "lower"
label_value_case = "lower"
tags = {
"kubernetes.io/cluster/" = "shared"
"upperTEST" = "testUPPER"
}
}
module "label8l_context" {
source = "../../"
context = module.label8l.context
}
output "label8l_context_id" {
value = module.label8l_context.id
}
output "label8l_context_context" {
value = module.label8l_context.context
}
output "label8l_context_tags" {
value = module.label8l_context.tags
}
output "label8l_id" {
value = module.label8l.id
}
output "label8l_context" {
value = module.label8l.context
}
output "label8l_tags" {
value = module.label8l.tags
}

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module "label8n" {
source = "../../"
enabled = true
namespace = "EG"
environment = "demo"
name = "blue"
attributes = ["eks", "ClusteR"]
delimiter = "-"
label_value_case = "none"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8n_context" {
source = "../../"
context = module.label8n.context
}
output "label8n_context_id" {
value = module.label8n_context.id
}
output "label8n_context_context" {
value = module.label8n_context.context
}
output "label8n_context_tags" {
value = module.label8n_context.tags
}
output "label8n_id" {
value = module.label8n.id
}
output "label8n_context" {
value = module.label8n.context
}
output "label8n_tags" {
value = module.label8n.tags
}

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module "label8t" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["EKS", "cluster"]
delimiter = "-"
label_key_case = "title"
label_value_case = "title"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8t_context" {
source = "../../"
context = module.label8t.context
}
output "label8t_context_id" {
value = module.label8t_context.id
}
output "label8t_context_context" {
value = module.label8t_context.context
}
output "label8t_context_tags" {
value = module.label8t_context.tags
}
output "label8t_id" {
value = module.label8t.id
}
output "label8t_context" {
value = module.label8t.context
}
output "label8t_tags" {
value = module.label8t.tags
}

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module "label8u" {
source = "../../"
enabled = true
namespace = "eg"
environment = "demo"
name = "blue"
attributes = ["cluster"]
delimiter = "-"
label_key_case = "upper"
label_value_case = "upper"
tags = {
"kubernetes.io/cluster/" = "shared"
}
}
module "label8u_context" {
source = "../../"
context = module.label8u.context
}
output "label8u_context_id" {
value = module.label8u_context.id
}
output "label8u_context_context" {
value = module.label8u_context.context
}
// debug
output "label8u_context_normalized_context" {
value = module.label8u_context.normalized_context
}
output "label8u_context_tags" {
value = module.label8u_context.tags
}
output "label8u_id" {
value = module.label8u.id
}
output "label8u_context" {
value = module.label8u.context
}
output "label8u_tags" {
value = module.label8u.tags
}

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terraform {
required_version = ">= 0.13.0"
}

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#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "cloudposse/label/null"
version = "0.24.1" # requires Terraform >= 0.13.0
enabled = var.enabled
namespace = var.namespace
environment = var.environment
stage = var.stage
name = var.name
delimiter = var.delimiter
attributes = var.attributes
tags = var.tags
additional_tag_map = var.additional_tag_map
label_order = var.label_order
regex_replace_chars = var.regex_replace_chars
id_length_limit = var.id_length_limit
label_key_case = var.label_key_case
label_value_case = var.label_value_case
context = var.context
}
# Copy contents of cloudposse/terraform-null-label/variables.tf here
variable "context" {
type = any
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = lookup(var.context, "label_key_case", null) == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = lookup(var.context, "label_value_case", null) == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters (minimum 6).
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
validation {
condition = var.id_length_limit == null ? true : var.id_length_limit >= 6 || var.id_length_limit == 0
error_message = "The id_length_limit must be >= 6 if supplied (not null), or 0 for unlimited length."
}
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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locals {
defaults = {
label_order = ["namespace", "environment", "stage", "name", "attributes"]
regex_replace_chars = "/[^-a-zA-Z0-9]/"
delimiter = "-"
replacement = ""
id_length_limit = 0
id_hash_length = 5
label_key_case = "title"
label_value_case = "lower"
}
# So far, we have decided not to allow overriding replacement or id_hash_length
replacement = local.defaults.replacement
id_hash_length = local.defaults.id_hash_length
# The values provided by variables supersede the values inherited from the context object,
# except for tags and attributes which are merged.
input = {
# It would be nice to use coalesce here, but we cannot, because it
# is an error for all the arguments to coalesce to be empty.
enabled = var.enabled == null ? var.context.enabled : var.enabled
namespace = var.namespace == null ? var.context.namespace : var.namespace
environment = var.environment == null ? var.context.environment : var.environment
stage = var.stage == null ? var.context.stage : var.stage
name = var.name == null ? var.context.name : var.name
delimiter = var.delimiter == null ? var.context.delimiter : var.delimiter
# modules tack on attributes (passed by var) to the end of the list (passed by context)
attributes = compact(distinct(concat(coalesce(var.context.attributes, []), coalesce(var.attributes, []))))
tags = merge(var.context.tags, var.tags)
additional_tag_map = merge(var.context.additional_tag_map, var.additional_tag_map)
label_order = var.label_order == null ? var.context.label_order : var.label_order
regex_replace_chars = var.regex_replace_chars == null ? var.context.regex_replace_chars : var.regex_replace_chars
id_length_limit = var.id_length_limit == null ? var.context.id_length_limit : var.id_length_limit
label_key_case = var.label_key_case == null ? lookup(var.context, "label_key_case", null) : var.label_key_case
label_value_case = var.label_value_case == null ? lookup(var.context, "label_value_case", null) : var.label_value_case
}
enabled = local.input.enabled
regex_replace_chars = coalesce(local.input.regex_replace_chars, local.defaults.regex_replace_chars)
# string_label_names are names of inputs that are strings (not list of strings) used as labels
string_label_names = ["name", "namespace", "environment", "stage"]
normalized_labels = { for k in local.string_label_names : k =>
local.input[k] == null ? "" : replace(local.input[k], local.regex_replace_chars, local.replacement)
}
normalized_attributes = compact(distinct([for v in local.input.attributes : replace(v, local.regex_replace_chars, local.replacement)]))
formatted_labels = { for k in local.string_label_names : k => local.label_value_case == "none" ? local.normalized_labels[k] :
local.label_value_case == "title" ? title(lower(local.normalized_labels[k])) :
local.label_value_case == "upper" ? upper(local.normalized_labels[k]) : lower(local.normalized_labels[k])
}
attributes = compact(distinct([
for v in local.normalized_attributes : (local.label_value_case == "none" ? v :
local.label_value_case == "title" ? title(lower(v)) :
local.label_value_case == "upper" ? upper(v) : lower(v))
]))
name = local.formatted_labels["name"]
namespace = local.formatted_labels["namespace"]
environment = local.formatted_labels["environment"]
stage = local.formatted_labels["stage"]
delimiter = local.input.delimiter == null ? local.defaults.delimiter : local.input.delimiter
label_order = local.input.label_order == null ? local.defaults.label_order : coalescelist(local.input.label_order, local.defaults.label_order)
id_length_limit = local.input.id_length_limit == null ? local.defaults.id_length_limit : local.input.id_length_limit
label_key_case = local.input.label_key_case == null ? local.defaults.label_key_case : local.input.label_key_case
label_value_case = local.input.label_value_case == null ? local.defaults.label_value_case : local.input.label_value_case
additional_tag_map = merge(var.context.additional_tag_map, var.additional_tag_map)
tags = merge(local.generated_tags, local.input.tags)
tags_as_list_of_maps = flatten([
for key in keys(local.tags) : merge(
{
key = key
value = local.tags[key]
}, var.additional_tag_map)
])
tags_context = {
# For AWS we need `Name` to be disambiguated since it has a special meaning
name = local.id
namespace = local.namespace
environment = local.environment
stage = local.stage
attributes = local.id_context.attributes
}
generated_tags = {
for l in keys(local.tags_context) :
local.label_key_case == "upper" ? upper(l) : (
local.label_key_case == "lower" ? lower(l) : title(lower(l))
) => local.tags_context[l] if length(local.tags_context[l]) > 0
}
id_context = {
name = local.name
namespace = local.namespace
environment = local.environment
stage = local.stage
attributes = join(local.delimiter, local.attributes)
}
labels = [for l in local.label_order : local.id_context[l] if length(local.id_context[l]) > 0]
id_full = join(local.delimiter, local.labels)
# Create a truncated ID if needed
delimiter_length = length(local.delimiter)
# Calculate length of normal part of ID, leaving room for delimiter and hash
id_truncated_length_limit = local.id_length_limit - (local.id_hash_length + local.delimiter_length)
# Truncate the ID and ensure a single (not double) trailing delimiter
id_truncated = local.id_truncated_length_limit <= 0 ? "" : "${trimsuffix(substr(local.id_full, 0, local.id_truncated_length_limit), local.delimiter)}${local.delimiter}"
# Support usages that disallow numeric characters. Would prefer tr 0-9 q-z but Terraform does not support it.
id_hash_plus = "${md5(local.id_full)}qrstuvwxyz"
id_hash_case = local.label_value_case == "title" ? title(local.id_hash_plus) : local.label_value_case == "upper" ? upper(local.id_hash_plus) : local.label_value_case == "lower" ? lower(local.id_hash_plus) : local.id_hash_plus
id_hash = replace(local.id_hash_case, local.regex_replace_chars, local.replacement)
# Create the short ID by adding a hash to the end of the truncated ID
id_short = substr("${local.id_truncated}${local.id_hash}", 0, local.id_length_limit)
id = local.id_length_limit != 0 && length(local.id_full) > local.id_length_limit ? local.id_short : local.id_full
# Context of this label to pass to other label modules
output_context = {
enabled = local.enabled
name = local.name
namespace = local.namespace
environment = local.environment
stage = local.stage
delimiter = local.delimiter
attributes = local.attributes
tags = local.tags
additional_tag_map = local.additional_tag_map
label_order = local.label_order
regex_replace_chars = local.regex_replace_chars
id_length_limit = local.id_length_limit
label_key_case = local.label_key_case
label_value_case = local.label_value_case
}
}

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@ -0,0 +1,88 @@
output "id" {
value = local.enabled ? local.id : ""
description = "Disambiguated ID restricted to `id_length_limit` characters in total"
}
output "id_full" {
value = local.enabled ? local.id_full : ""
description = "Disambiguated ID not restricted in length"
}
output "enabled" {
value = local.enabled
description = "True if module is enabled, false otherwise"
}
output "namespace" {
value = local.enabled ? local.namespace : ""
description = "Normalized namespace"
}
output "environment" {
value = local.enabled ? local.environment : ""
description = "Normalized environment"
}
output "name" {
value = local.enabled ? local.name : ""
description = "Normalized name"
}
output "stage" {
value = local.enabled ? local.stage : ""
description = "Normalized stage"
}
output "delimiter" {
value = local.enabled ? local.delimiter : ""
description = "Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes`"
}
output "attributes" {
value = local.enabled ? local.attributes : []
description = "List of attributes"
}
output "tags" {
value = local.enabled ? local.tags : {}
description = "Normalized Tag map"
}
output "additional_tag_map" {
value = local.additional_tag_map
description = "The merged additional_tag_map"
}
output "label_order" {
value = local.label_order
description = "The naming order actually used to create the ID"
}
output "regex_replace_chars" {
value = local.regex_replace_chars
description = "The regex_replace_chars actually used to create the ID"
}
output "id_length_limit" {
value = local.id_length_limit
description = "The id_length_limit actually used to create the ID, with `0` meaning unlimited"
}
output "tags_as_list_of_maps" {
value = local.tags_as_list_of_maps
description = "Additional tags as a list of maps, which can be used in several AWS resources"
}
output "normalized_context" {
value = local.output_context
description = "Normalized context of this module"
}
output "context" {
value = local.input
description = <<-EOT
Merged but otherwise unmodified input to this module, to be used as context input to other modules.
Note: this version will have null values as defaults, not the values actually used as defaults.
EOT
}

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@ -0,0 +1,43 @@
TEST_HARNESS ?= https://github.com/cloudposse/test-harness.git
TEST_HARNESS_BRANCH ?= master
TEST_HARNESS_PATH = $(realpath .test-harness)
BATS_ARGS ?= --tap
BATS_LOG ?= test.log
# Define a macro to run the tests
define RUN_TESTS
@echo "Running tests in $(1)"
@cd $(1) && bats $(BATS_ARGS) $(addsuffix .bats,$(addprefix $(TEST_HARNESS_PATH)/test/terraform/,$(TESTS)))
endef
default: all
-include Makefile.*
## Provision the test-harnesss
.test-harness:
[ -d $@ ] || git clone --depth=1 -b $(TEST_HARNESS_BRANCH) $(TEST_HARNESS) $@
## Initialize the tests
init: .test-harness
## Install all dependencies (OS specific)
deps::
@exit 0
## Clean up the test harness
clean:
[ "$(TEST_HARNESS_PATH)" == "/" ] || rm -rf $(TEST_HARNESS_PATH)
## Run all tests
all: module examples/complete
## Run basic sanity checks against the module itself
module: export TESTS ?= installed lint get-modules module-pinning get-plugins provider-pinning validate terraform-docs input-descriptions output-descriptions
module: deps
$(call RUN_TESTS, ../)
## Run tests against example
examples/complete: export TESTS ?= installed lint get-modules get-plugins validate init plan apply
examples/complete: deps
$(call RUN_TESTS, ../$@)

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@ -0,0 +1,5 @@
ifneq (,$(wildcard /sbin/apk))
## Install all dependencies for alpine
deps:: init
@apk add --update terraform-docs@cloudposse json2hcl@cloudposse
endif

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@ -0,0 +1,30 @@
export TF_CLI_ARGS_init ?= -get-plugins=true
export TERRAFORM_VERSION ?= $(shell curl -s https://checkpoint-api.hashicorp.com/v1/check/terraform | jq -r -M '.current_version' | cut -d. -f1-2)
.DEFAULT_GOAL : all
.PHONY: all
## Default target
all: test
.PHONY : init
## Initialize tests
init:
@exit 0
.PHONY : test
## Run tests
test: init
go mod download
go test -v -timeout 60m -run TestExamplesComplete
## Run tests in docker container
docker/test:
docker run --name terratest --rm -it -e AWS_ACCESS_KEY_ID -e AWS_SECRET_ACCESS_KEY -e AWS_SESSION_TOKEN -e GITHUB_TOKEN \
-e PATH="/usr/local/terraform/$(TERRAFORM_VERSION)/bin:/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" \
-v $(CURDIR)/../../:/module/ cloudposse/test-harness:latest -C /module/test/src test
.PHONY : clean
## Clean up files
clean:
rm -rf ../../examples/complete/*.tfstate*

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@ -0,0 +1,293 @@
package test
import (
"fmt"
"testing"
"github.com/gruntwork-io/terratest/modules/terraform"
"github.com/qdm12/reprint"
"github.com/stretchr/testify/assert"
)
type NLContext struct {
AdditionalTagMap map[string]string `json:"additional_tag_map"`
Attributes []string `json:"attributes"`
Delimiter interface{} `json:"delimiter"`
Enabled bool `json:"enabled"`
Environment interface{} `json:"environment"`
LabelOrder []string `json:"label_order"`
Name interface{} `json:"name"`
Namespace interface{} `json:"namespace"`
RegexReplaceChars interface{} `json:"regex_replace_chars"`
Stage interface{} `json:"stage"`
Tags map[string]string `json:"tags"`
}
// Test the Terraform module in examples/complete using Terratest.
func TestExamplesComplete(t *testing.T) {
t.Parallel()
terraformOptions := &terraform.Options{
// The path to where our Terraform code is located
TerraformDir: "../../examples/complete",
Upgrade: true,
}
// At the end of the test, run `terraform destroy` to clean up any resources that were created
defer terraform.Destroy(t, terraformOptions)
// This will run `terraform init` and `terraform apply` and fail the test if there are any errors
terraform.InitAndApply(t, terraformOptions)
expectedLabel1Context := NLContext{
Enabled: true,
Namespace: "CloudPosse",
Environment: "UAT",
Stage: "build",
Name: "Winston Churchroom",
Attributes: []string{"fire", "water", "earth", "air"},
Delimiter: "-",
LabelOrder: []string{"name", "environment", "stage", "attributes"},
Tags: map[string]string{
"City": "Dublin",
"Environment": "Private",
},
AdditionalTagMap: map[string]string{},
}
var expectedLabel1NormalizedContext NLContext
_ = reprint.FromTo(&expectedLabel1Context, &expectedLabel1NormalizedContext)
expectedLabel1NormalizedContext.Namespace = "cloudposse"
expectedLabel1NormalizedContext.Environment = "uat"
expectedLabel1NormalizedContext.Name = "winstonchurchroom"
expectedLabel1NormalizedContext.RegexReplaceChars = "/[^-a-zA-Z0-9]/"
expectedLabel1NormalizedContext.Tags = map[string]string{
"City": "Dublin",
"Environment": "Private",
"Namespace": "cloudposse",
"Stage": "build",
"Name": "winstonchurchroom-uat-build-fire-water-earth-air",
"Attributes": "fire-water-earth-air",
}
var label1NormalizedContext, label1Context NLContext
// Run `terraform output` to get the value of an output variable
label1 := terraform.OutputMap(t, terraformOptions, "label1")
label1Tags := terraform.OutputMap(t, terraformOptions, "label1_tags")
terraform.OutputStruct(t, terraformOptions, "label1_normalized_context", &label1NormalizedContext)
terraform.OutputStruct(t, terraformOptions, "label1_context", &label1Context)
// Verify we're getting back the outputs we expect
assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1["id"])
assert.Equal(t, "winstonchurchroom-uat-build-fire-water-earth-air", label1Tags["Name"])
assert.Equal(t, "Dublin", label1Tags["City"])
assert.Equal(t, "Private", label1Tags["Environment"])
assert.Equal(t, expectedLabel1NormalizedContext, label1NormalizedContext)
assert.Equal(t, expectedLabel1Context, label1Context)
label1t1 := terraform.OutputMap(t, terraformOptions, "label1t1")
label1t1Tags := terraform.OutputMap(t, terraformOptions, "label1t1_tags")
assert.Equal(t, "winstonchurchroom-uat-6a0b34", label1t1["id"],
"Extra hash character should be added when trailing delimiter is removed")
assert.Equal(t, label1["id"], label1t1["id_full"], "id_full should not be truncated")
assert.Equal(t, label1t1["id"], label1t1Tags["Name"], "Name tag should match ID")
label1t2 := terraform.OutputMap(t, terraformOptions, "label1t2")
label1t2Tags := terraform.OutputMap(t, terraformOptions, "label1t2_tags")
assert.Equal(t, "winstonchurchroom-uat-b-6a0b3", label1t2["id"])
assert.Equal(t, label1t2["id"], label1t2Tags["Name"], "Name tag should match ID")
// Run `terraform output` to get the value of an output variable
label2 := terraform.OutputMap(t, terraformOptions, "label2")
label2Tags := terraform.OutputMap(t, terraformOptions, "label2_tags")
// Verify we're getting back the outputs we expect
assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2["id"])
assert.Equal(t, "charlie+uat+test+fire+water+earth+air", label2Tags["Name"])
assert.Equal(t, "London", label2Tags["City"])
assert.Equal(t, "Public", label2Tags["Environment"])
var expectedLabel3cContext, label3cContext NLContext
_ = reprint.FromTo(&expectedLabel1Context, &expectedLabel3cContext)
expectedLabel3cContext.Name = "Starfish"
expectedLabel3cContext.Stage = "release"
expectedLabel3cContext.Delimiter = "."
expectedLabel3cContext.RegexReplaceChars = "/[^-a-zA-Z0-9.]/"
expectedLabel3cContext.Tags["Eat"] = "Carrot"
expectedLabel3cContext.Tags["Animal"] = "Rabbit"
// Run `terraform output` to get the value of an output variable
label3c := terraform.OutputMap(t, terraformOptions, "label3c")
label3cTags := terraform.OutputMap(t, terraformOptions, "label3c_tags")
terraform.OutputStruct(t, terraformOptions, "label3c_context", &label3cContext)
// Verify we're getting back the outputs we expect
assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3c["id"])
assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3cTags["Name"])
assert.Equal(t, expectedLabel3cContext, label3cContext)
var expectedLabel3nContext, label3nContext NLContext
_ = reprint.FromTo(&expectedLabel1NormalizedContext, &expectedLabel3nContext)
expectedLabel3nContext.Name = "Starfish"
expectedLabel3nContext.Stage = "release"
expectedLabel3nContext.Delimiter = "."
expectedLabel3nContext.RegexReplaceChars = "/[^-a-zA-Z0-9.]/"
expectedLabel3nContext.Tags["Eat"] = "Carrot"
expectedLabel3nContext.Tags["Animal"] = "Rabbit"
// Run `terraform output` to get the value of an output variable
label3n := terraform.OutputMap(t, terraformOptions, "label3n")
label3nTags := terraform.OutputMap(t, terraformOptions, "label3n_tags")
terraform.OutputStruct(t, terraformOptions, "label3n_context", &label3nContext)
// Verify we're getting back the outputs we expect
assert.Equal(t, "starfish.uat.release.fire.water.earth.air", label3n["id"])
assert.Equal(t, label1Tags["Name"], label3nTags["Name"],
"Tag from label1 normalized context should overwrite label3n generated tag")
assert.Equal(t, expectedLabel3nContext, label3nContext)
// Run `terraform output` to get the value of an output variable
label4 := terraform.OutputMap(t, terraformOptions, "label4")
label4Tags := terraform.OutputMap(t, terraformOptions, "label4_tags")
// Verify we're getting back the outputs we expect
assert.Equal(t, "cloudposse-uat-big-fat-honking-cluster", label4["id"])
assert.Equal(t, "cloudposse-uat-big-fat-honking-cluster", label4Tags["Name"])
// Run `terraform output` to get the value of an output variable
label5 := terraform.OutputMap(t, terraformOptions, "label5")
// Verify we're getting back the outputs we expect
assert.Equal(t, "", label5["id"])
label6f := terraform.OutputMap(t, terraformOptions, "label6f")
label6fTags := terraform.OutputMap(t, terraformOptions, "label6f_tags")
// Test of setting var.label_key_case = "lower", var.label_value_case = "upper"
assert.Equal(t, "CP~UW2~PRD~NULL-LABEL", label6f["id_full"])
assert.Equal(t, label6f["id_full"], label6f["id"], "id should not be truncated")
assert.Equal(t, label6f["id"], label6fTags["name"], "Name tag should match ID")
label6t := terraform.OutputMap(t, terraformOptions, "label6t")
label6tTags := terraform.OutputMap(t, terraformOptions, "label6t_tags")
assert.Equal(t, "CPUW2PRDNULL-LABEL", label6t["id_full"])
assert.NotEqual(t, label6t["id_full"], label6t["id"], "id should be truncated")
assert.Equal(t, label6t["id"], label6tTags["name"], "Name tag should match ID")
assert.Equal(t, label6t["id_length_limit"], fmt.Sprintf("%d", len(label6t["id"])),
"Truncated ID length should equal length limit")
label7 := terraform.OutputMap(t, terraformOptions, "label7")
assert.Equal(t, "eg-demo-blue-cluster-nodegroup", label7["id"], "var.attributes should be appended after context.attributes")
// Verify that apply with `label_key_case=title`, `label_value_case=lower`, `delimiter=""` returns expected value of id, context id
label8dndID := terraform.Output(t, terraformOptions, "label8dnd_id")
label8dndContextID := terraform.Output(t, terraformOptions, "label8dnd_context_id")
assert.Equal(t, "egdemobluecluster", label8dndID)
assert.Equal(t, label8dndID, label8dndContextID, "ID and context ID should be equal")
// Verify that apply with `label_key_case=title`, `label_value_case=lower`, `delimiter="x"` returns expected value of id, context id
label8dcdID := terraform.Output(t, terraformOptions, "label8dcd_id")
label8dcdContextID := terraform.Output(t, terraformOptions, "label8dcd_context_id")
assert.Equal(t, "egxdemoxbluexcluster", label8dcdID)
assert.Equal(t, label8dcdID, label8dcdContextID, "ID and context ID should be equal")
// Verify that apply with `label_key_case=title` and `label_value_case=lower` returns expected values of id, tags, context tags
label8dExpectedTags := map[string]string{
"Attributes": "cluster",
"Environment": "demo",
"Name": "eg-demo-blue-cluster",
"Namespace": "eg",
"kubernetes.io/cluster/": "shared",
}
label8dID := terraform.Output(t, terraformOptions, "label8d_id")
label8dContextID := terraform.Output(t, terraformOptions, "label8d_context_id")
assert.Equal(t, "eg-demo-blue-cluster", label8dID)
assert.Equal(t, label8dID, label8dContextID, "ID and context ID should be equal")
label8dTags := terraform.OutputMap(t, terraformOptions, "label8d_tags")
label8dContextTags := terraform.OutputMap(t, terraformOptions, "label8d_context_tags")
assert.Exactly(t, label8dExpectedTags, label8dTags, "generated tags are different from expected")
assert.Exactly(t, label8dTags, label8dContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=lower` and `label_value_case=lower` returns expected values of id, tags, context tags
label8lExpectedTags := map[string]string{
"attributes": "cluster",
"environment": "demo",
"name": "eg-demo-blue-cluster",
"namespace": "eg",
"kubernetes.io/cluster/": "shared",
"upperTEST": "testUPPER",
}
label8lID := terraform.Output(t, terraformOptions, "label8l_id")
label8lContextID := terraform.Output(t, terraformOptions, "label8l_context_id")
assert.Equal(t, "eg-demo-blue-cluster", label8lID)
assert.Equal(t, label8lID, label8lContextID, "ID and context ID should be equal")
label8lTags := terraform.OutputMap(t, terraformOptions, "label8l_tags")
label8lContextTags := terraform.OutputMap(t, terraformOptions, "label8l_context_tags")
assert.Exactly(t, label8lExpectedTags, label8lTags, "generated tags are different from expected")
assert.Exactly(t, label8lTags, label8lContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=title` and `label_value_case=title` returns expected values of id, tags, context tags
label8tExpectedTags := map[string]string{
"Attributes": "Eks-Cluster",
"Environment": "Demo",
"Name": "Eg-Demo-Blue-Eks-Cluster",
"Namespace": "Eg",
"kubernetes.io/cluster/": "shared",
}
label8tID := terraform.Output(t, terraformOptions, "label8t_id")
label8tContextID := terraform.Output(t, terraformOptions, "label8t_context_id")
assert.Equal(t, "Eg-Demo-Blue-Eks-Cluster", label8tID)
assert.Equal(t, label8tID, label8tContextID, "ID and context ID should be equal")
label8tTags := terraform.OutputMap(t, terraformOptions, "label8t_tags")
label8tContextTags := terraform.OutputMap(t, terraformOptions, "label8t_context_tags")
assert.Exactly(t, label8tExpectedTags, label8tTags, "generated tags are different from expected")
assert.Exactly(t, label8tTags, label8tContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=upper` and `label_value_case=upper` returns expected values of id, tags, context tags
label8uExpectedTags := map[string]string{
"ATTRIBUTES": "CLUSTER",
"ENVIRONMENT": "DEMO",
"NAME": "EG-DEMO-BLUE-CLUSTER",
"NAMESPACE": "EG",
"kubernetes.io/cluster/": "shared",
}
label8uID := terraform.Output(t, terraformOptions, "label8u_id")
label8uContextID := terraform.Output(t, terraformOptions, "label8u_context_id")
assert.Equal(t, "EG-DEMO-BLUE-CLUSTER", label8uID)
assert.Equal(t, label8uID, label8uContextID, "ID and context ID should be equal")
label8uTags := terraform.OutputMap(t, terraformOptions, "label8u_tags")
label8uContextTags := terraform.OutputMap(t, terraformOptions, "label8u_context_tags")
assert.Exactly(t, label8uExpectedTags, label8uTags, "generated tags are different from expected")
assert.Exactly(t, label8uTags, label8uContextTags, "tags and context tags should be equal")
// Verify that apply with `label_key_case=title` and `label_value_case=none` returns expected values of id, tags, context tags
label8nExpectedTags := map[string]string{
"Attributes": "eks-ClusteR",
"Environment": "demo",
"Name": "EG-demo-blue-eks-ClusteR",
"Namespace": "EG",
"kubernetes.io/cluster/": "shared",
}
label8nID := terraform.Output(t, terraformOptions, "label8n_id")
label8nContextID := terraform.Output(t, terraformOptions, "label8n_context_id")
assert.Equal(t, "EG-demo-blue-eks-ClusteR", label8nID)
assert.Equal(t, label8nID, label8nContextID, "ID and context ID should be equal")
label8nTags := terraform.OutputMap(t, terraformOptions, "label8n_tags")
label8nContextTags := terraform.OutputMap(t, terraformOptions, "label8n_context_tags")
assert.Exactly(t, label8nExpectedTags, label8nTags, "generated tags are different from expected")
assert.Exactly(t, label8nTags, label8nContextTags, "tags and context tags should be equal")
}

View File

@ -0,0 +1,9 @@
module github.com/cloudposse/terraform-null-label
go 1.14
require (
github.com/gruntwork-io/terratest v0.31.1
github.com/qdm12/reprint v0.0.0-20200326205758-722754a53494
github.com/stretchr/testify v1.6.1
)

View File

@ -0,0 +1,595 @@
cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw=
cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
github.com/Azure/azure-sdk-for-go v35.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/azure-sdk-for-go v38.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/azure-sdk-for-go v46.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
github.com/Azure/go-autorest v14.2.0+incompatible/go.mod h1:r+4oMnoxhatjLLJ6zxSWATqVooLgysK6ZNox3g/xq24=
github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI=
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golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
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golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
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golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
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google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.23.1/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
google.golang.org/grpc v1.24.0/go.mod h1:XDChyiUovWa60DnaeDeZmSW86xtLtjtZbwvSiRnRtcA=
google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
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google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
gopkg.in/gcfg.v1 v1.2.0/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
gopkg.in/inf.v0 v0.9.1/go.mod h1:cWUDdTG/fYaXco+Dcufb5Vnc6Gp2YChqWtbxRZE0mXw=
gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
gopkg.in/square/go-jose.v2 v2.2.2/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
gopkg.in/warnings.v0 v0.1.1/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
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gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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k8s.io/api v0.17.0/go.mod h1:npsyOePkeP0CPwyGfXDHxvypiYMJxBWAMpQxCaJ4ZxI=
k8s.io/api v0.19.3/go.mod h1:VF+5FT1B74Pw3KxMdKyinLo+zynBaMBiAfGMuldcNDs=
k8s.io/apimachinery v0.17.0/go.mod h1:b9qmWdKlLuU9EBh+06BtLcSf/Mu89rWL33naRxs1uZg=
k8s.io/apimachinery v0.19.3/go.mod h1:DnPGDnARWFvYa3pMHgSxtbZb7gpzzAZ1pTfaUNDVlmA=
k8s.io/apiserver v0.17.0/go.mod h1:ABM+9x/prjINN6iiffRVNCBR2Wk7uY4z+EtEGZD48cg=
k8s.io/client-go v0.17.0/go.mod h1:TYgR6EUHs6k45hb6KWjVD6jFZvJV4gHDikv/It0xz+k=
k8s.io/client-go v0.19.3/go.mod h1:+eEMktZM+MG0KO+PTkci8xnbCZHvj9TqR6Q1XDUIJOM=
k8s.io/cloud-provider v0.17.0/go.mod h1:Ze4c3w2C0bRsjkBUoHpFi+qWe3ob1wI2/7cUn+YQIDE=
k8s.io/code-generator v0.0.0-20191121015212-c4c8f8345c7e/go.mod h1:DVmfPQgxQENqDIzVR2ddLXMH34qeszkKSdH/N+s+38s=
k8s.io/component-base v0.17.0/go.mod h1:rKuRAokNMY2nn2A6LP/MiwpoaMRHpfRnrPaUJJj1Yoc=
k8s.io/csi-translation-lib v0.17.0/go.mod h1:HEF7MEz7pOLJCnxabi45IPkhSsE/KmxPQksuCrHKWls=
k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/gengo v0.0.0-20190822140433-26a664648505/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
k8s.io/klog v1.0.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=
k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
k8s.io/kube-openapi v0.0.0-20191107075043-30be4d16710a/go.mod h1:1TqjTSzOxsLGIKfj0lK8EeCP7K1iUG65v09OM0/WG5E=
k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6/go.mod h1:UuqjUnNftUyPE5H64/qeyjQoUZhGpeFDVdxjTeEVN2o=
k8s.io/legacy-cloud-providers v0.17.0/go.mod h1:DdzaepJ3RtRy+e5YhNtrCYwlgyK87j/5+Yfp0L9Syp8=
k8s.io/utils v0.0.0-20191114184206-e782cd3c129f/go.mod h1:sZAwmy6armz5eXlNoLmJcl4F1QuKu7sr+mFQ0byX7Ew=
k8s.io/utils v0.0.0-20200729134348-d5654de09c73/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
modernc.org/cc v1.0.0/go.mod h1:1Sk4//wdnYJiUIxnW8ddKpaOJCF37yAdqYnkxUpaYxw=
modernc.org/golex v1.0.0/go.mod h1:b/QX9oBD/LhixY6NDh+IdGv17hgB+51fET1i2kPSmvk=
modernc.org/mathutil v1.0.0/go.mod h1:wU0vUrJsVWBZ4P6e7xtFJEhFSNsfRLJ8H458uRjg03k=
modernc.org/strutil v1.0.0/go.mod h1:lstksw84oURvj9y3tn8lGvRxyRC1S2+g5uuIzNfIOBs=
modernc.org/xc v1.0.0/go.mod h1:mRNCo0bvLjGhHO9WsyuKVU4q0ceiDDDoEeWDJHrNx8I=
rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
sigs.k8s.io/structured-merge-diff v0.0.0-20190525122527-15d366b2352e/go.mod h1:wWxsB5ozmmv/SG7nM11ayaAW51xMvak/t1r0CSlcokI=
sigs.k8s.io/structured-merge-diff v1.0.1-0.20191108220359-b1b620dd3f06/go.mod h1:/ULNhyfzRopfcjskuui0cTITekDduZ7ycKN3oUT9R18=
sigs.k8s.io/structured-merge-diff/v4 v4.0.1/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

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@ -0,0 +1,157 @@
variable "context" {
type = any
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = lookup(var.context, "label_key_case", null) == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = lookup(var.context, "label_value_case", null) == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters (minimum 6).
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
validation {
condition = var.id_length_limit == null ? true : var.id_length_limit >= 6 || var.id_length_limit == 0
error_message = "The id_length_limit must be >= 6 if supplied (not null), or 0 for unlimited length."
}
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}

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@ -0,0 +1,3 @@
terraform {
required_version = ">= 0.13.0"
}

@ -0,0 +1 @@
Subproject commit 6f24262652a52a055de711cfee0e3dfac5221e0e

View File

@ -0,0 +1,201 @@
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View File

@ -0,0 +1,10 @@
SHELL := /bin/bash
# List of targets the `readme` target should call before generating the readme
export README_DEPS ?= docs/targets.md docs/terraform.md
-include $(shell curl -sSL -o .build-harness "https://git.io/build-harness"; echo .build-harness)
## Lint terraform code
lint:
$(SELF) terraform/install terraform/get-modules terraform/get-plugins terraform/lint terraform/validate

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@ -0,0 +1,938 @@
<!-- markdownlint-disable -->
# terraform-null-label [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-null-label.svg)](https://github.com/cloudposse/terraform-null-label/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
<!-- markdownlint-restore -->
[![README Header][readme_header_img]][readme_header_link]
[![Cloud Posse][logo]](https://cpco.io/homepage)
<!--
** DO NOT EDIT THIS FILE
**
** This file was automatically generated by the `build-harness`.
** 1) Make all changes to `README.yaml`
** 2) Run `make init` (you only need to do this once)
** 3) Run`make readme` to rebuild this file.
**
** (We maintain HUNDREDS of open source projects. This is how we maintain our sanity.)
**
-->
Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
This module generates names using the following convention by default: `{namespace}-{environment}-{stage}-{name}-{attributes}`.
However, it is highly configurable. The delimiter (e.g. `-`) is configurable. Each label item is optional (although you must provide at least one).
So if you prefer the term `stage` to `environment`
you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
- If attributes are excluded but `namespace`, `stage`, and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`.
- If you want the attributes in a different order, you can specify that, too, with the `label_order` list.
- You can set a maximum length for the name, and the module will create a unique name that fits within that length.
- You can control the letter case of the generated labels which make up the `id` using `var.label_value_case`.
- The labels are also exported as tags. You can control the case of the tag names (keys) using `var.label_tag_case`.
It's recommended to use one `terraform-null-label` module for every unique resource of a given resource type.
For example, if you have 10 instances, there should be 10 different labels.
However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.
All [Cloud Posse modules](https://github.com/cloudposse?utf8=%E2%9C%93&q=terraform-&type=&language=) use this module to ensure resources can be instantiated multiple times within an account and without conflict.
**NOTE:** The `null` originally referred to the primary Terraform [provider](https://www.terraform.io/docs/providers/null/index.html) used in this module.
With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.
- Releases of this module from `0.23.0` onward only work with Terraform 0.13 or newer.
- Releases of this module from `0.12.0` through `0.22.1` support `HCL2` and are compatible with Terraform 0.12 or newer.
- Releases of this module prior to `0.12.0` are compatible with earlier versions of terraform like Terraform 0.11.
---
This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps.
[<img align="right" title="Share via Email" src="https://docs.cloudposse.com/images/ionicons/ios-email-outline-2.0.1-16x16-999999.svg"/>][share_email]
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[![Terraform Open Source Modules](https://docs.cloudposse.com/images/terraform-open-source-modules.svg)][terraform_modules]
It's 100% Open Source and licensed under the [APACHE2](LICENSE).
We literally have [*hundreds of terraform modules*][terraform_modules] that are Open Source and well-maintained. Check them out!
## Security & Compliance [<img src="https://cloudposse.com/wp-content/uploads/2020/11/bridgecrew.svg" width="250" align="right" />](https://bridgecrew.io/)
Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.
| Benchmark | Description |
|--------|---------------|
| [![Infrastructure Security](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/general)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=INFRASTRUCTURE+SECURITY) | Infrastructure Security Compliance |
| [![CIS KUBERNETES](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_kubernetes)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+KUBERNETES+V1.5) | Center for Internet Security, KUBERNETES Compliance |
| [![CIS AWS](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_aws)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+AWS+V1.2) | Center for Internet Security, AWS Compliance |
| [![CIS AZURE](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_azure)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+AZURE+V1.1) | Center for Internet Security, AZURE Compliance |
| [![PCI-DSS](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/pci)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=PCI-DSS+V3.2) | Payment Card Industry Data Security Standards Compliance |
| [![NIST-800-53](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/nist)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=NIST-800-53) | National Institute of Standards and Technology Compliance |
| [![ISO27001](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/iso)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=ISO27001) | Information Security Management System, ISO/IEC 27001 Compliance |
| [![SOC2](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/soc2)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=SOC2)| Service Organization Control 2 Compliance |
| [![CIS GCP](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/cis_gcp)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=CIS+GCP+V1.1) | Center for Internet Security, GCP Compliance |
| [![HIPAA](https://www.bridgecrew.cloud/badges/github/cloudposse/terraform-null-label/hipaa)](https://www.bridgecrew.cloud/link/badge?vcs=github&fullRepo=cloudposse%2Fterraform-null-label&benchmark=HIPAA) | Health Insurance Portability and Accountability Compliance |
## Usage
**IMPORTANT:** We do not pin modules to versions in our examples because of the
difficulty of keeping the versions in the documentation in sync with the latest released versions.
We highly recommend that in your code you pin the version to the exact version you are
using so that your infrastructure remains stable, and update versions in a
systematic way so that they do not catch you by surprise.
Also, because of a bug in the Terraform registry ([hashicorp/terraform#21417](https://github.com/hashicorp/terraform/issues/21417)),
the registry shows many of our inputs as required when in fact they are optional.
The table below correctly indicates which inputs are required.
### Defaults
Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
The context object is a single object that contains all the input values for `terraform-null-label`.
However, each input value can also be specified individually by name as a standard Terraform variable,
and the value of those variables, when set to something other than `null`, will override the value
in the context object. In order to allow chaining of these objects, where the context object input to one
module is transformed and passed to the next module, all the variables default to `null` or empty collections.
The actual default values used when nothing is explicitly set are describe in the documentation below.
For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
`terraform-null-label` will actually use the default delimiter `-` (hyphen).
A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
future modules in the chain cannot reset the value back to the original default. Insted, the new setting
becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
be overwritten.
### Simple Example
```hcl
module "eg_prod_bastion_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["public"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
```
This will create an `id` with the value of `eg-prod-bastion-public` because when generating `id`, the default order is `namespace`, `environment`, `stage`, `name`, `attributes`
(you can override it by using the `label_order` variable, see [Advanced Example 3](#advanced-example-3)).
Now reference the label when creating an instance:
```hcl
resource "aws_instance" "eg_prod_bastion_public" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_label.tags
}
```
Or define a security group:
```hcl
resource "aws_security_group" "eg_prod_bastion_public" {
vpc_id = var.vpc_id
name = module.eg_prod_bastion_label.id
tags = module.eg_prod_bastion_label.tags
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
```
### Advanced Example
Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
<details><summary>Click to show</summary>
```hcl
module "eg_prod_bastion_abc_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["abc"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_abc" {
name = module.eg_prod_bastion_abc_label.id
tags = module.eg_prod_bastion_abc_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_abc" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_abc_label.tags
  vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}
module "eg_prod_bastion_xyz_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["xyz"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_xyz" {
name = module.eg_prod_bastion_xyz_label.id
tags = module.eg_prod_bastion_xyz_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_xyz" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_xyz_label.tags
vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}
```
</details>
### Advanced Example 2
Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
<details><summary>Click to show</summary>
```hcl
tags = [
{
key = Name,
propagate_at_launch = 1,
value = namespace-stage-name
},
{
key = Namespace,
propagate_at_launch = 1,
value = namespace
},
{
key = Stage,
propagate_at_launch = 1,
value = stage
}
]
```
Autoscaling group using propagating tagging below (full example: [autoscalinggroup](examples/autoscalinggroup/main.tf))
```hcl
################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
namespace = "cp"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template = {
id = "aws_launch_template.default.id
version = "$$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
```
</details>
### Advanced Example 3
See [complete example](./examples/complete) for even more examples.
This example shows how you can pass the `context` output of one label module to the next label_module,
allowing you to create one label that has the base set of values, and then creating every extra label
as a derivative of that.
<details><summary>Click to show</summary>
```hcl
module "label1" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
module "label2" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
tags = {
"City" = "London"
"Environment" = "Public"
}
}
module "label3" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
```
This creates label outputs like this:
```hcl
label1 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"id" = "winstonchurchroom-uat-build-fire-water-earth-air"
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"stage" = "build"
}
label1_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Winston Churchroom"
"namespace" = "CloudPosse"
"stage" = "build"
"tags" = {
"City" = "Dublin"
"Environment" = "Private"
}
}
label1_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9]/"
"stage" = "build"
"tags" = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
}
label1_tags = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
label2 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"id" = "charlie+uat+test+fire+water+earth+air"
"name" = "charlie"
"namespace" = "cloudposse"
"stage" = "test"
}
label2_context = {
"additional_tag_map" = {
"additional_tag" = "yes"
"propagate_at_launch" = "true"
}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Charlie"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
"stage" = "test"
"tags" = {
"City" = "London"
"Environment" = "Public"
}
}
label2_tags = {
"Attributes" = "fire+water+earth+air"
"City" = "London"
"Environment" = "Public"
"Name" = "charlie+uat+test+fire+water+earth+air"
"Namespace" = "cloudposse"
"Stage" = "test"
}
label2_tags_as_list_of_maps = [
{
"additional_tag" = "yes"
"key" = "Attributes"
"propagate_at_launch" = "true"
"value" = "fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "City"
"propagate_at_launch" = "true"
"value" = "London"
},
{
"additional_tag" = "yes"
"key" = "Environment"
"propagate_at_launch" = "true"
"value" = "Public"
},
{
"additional_tag" = "yes"
"key" = "Name"
"propagate_at_launch" = "true"
"value" = "charlie+uat+test+fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "Namespace"
"propagate_at_launch" = "true"
"value" = "cloudposse"
},
{
"additional_tag" = "yes"
"key" = "Stage"
"propagate_at_launch" = "true"
"value" = "test"
},
]
label3 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"id" = "starfish.uat.release.fire.water.earth.air"
"name" = "starfish"
"namespace" = "cloudposse"
"stage" = "release"
}
label3_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Starfish"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
}
}
label3_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "starfish"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
}
label3_tags = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
```
</details>
<!-- markdownlint-disable -->
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
```
<!-- markdownlint-restore -->
<!-- markdownlint-disable -->
## Requirements
| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
## Providers
No provider.
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
## Outputs
| Name | Description |
|------|-------------|
| additional\_tag\_map | The merged additional\_tag\_map |
| attributes | List of attributes |
| context | Merged but otherwise unmodified input to this module, to be used as context input to other modules.<br>Note: this version will have null values as defaults, not the values actually used as defaults. |
| delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
| enabled | True if module is enabled, false otherwise |
| environment | Normalized environment |
| id | Disambiguated ID restricted to `id_length_limit` characters in total |
| id\_full | Disambiguated ID not restricted in length |
| id\_length\_limit | The id\_length\_limit actually used to create the ID, with `0` meaning unlimited |
| label\_order | The naming order actually used to create the ID |
| name | Normalized name |
| namespace | Normalized namespace |
| normalized\_context | Normalized context of this module |
| regex\_replace\_chars | The regex\_replace\_chars actually used to create the ID |
| stage | Normalized stage |
| tags | Normalized Tag map |
| tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
<!-- markdownlint-restore -->
## Share the Love
Like this project? Please give it a ★ on [our GitHub](https://github.com/cloudposse/terraform-null-label)! (it helps us **a lot**)
Are you using this project or any of our other projects? Consider [leaving a testimonial][testimonial]. =)
## Related Projects
Check out these related projects.
- [terraform-terraform-label](https://github.com/cloudposse/terraform-terraform-label) - Terraform Module to define a consistent naming convention by (namespace, environment, stage, name, [attributes])
## Help
**Got a question?** We got answers.
File a GitHub [issue](https://github.com/cloudposse/terraform-null-label/issues), send us an [email][email] or join our [Slack Community][slack].
[![README Commercial Support][readme_commercial_support_img]][readme_commercial_support_link]
## DevOps Accelerator for Startups
We are a [**DevOps Accelerator**][commercial_support]. We'll help you build your cloud infrastructure from the ground up so you can own it. Then we'll show you how to operate it and stick around for as long as you need us.
[![Learn More](https://img.shields.io/badge/learn%20more-success.svg?style=for-the-badge)][commercial_support]
Work directly with our team of DevOps experts via email, slack, and video conferencing.
We deliver 10x the value for a fraction of the cost of a full-time engineer. Our track record is not even funny. If you want things done right and you need it done FAST, then we're your best bet.
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## Slack Community
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## Discourse Forums
Participate in our [Discourse Forums][discourse]. Here you'll find answers to commonly asked questions. Most questions will be related to the enormous number of projects we support on our GitHub. Come here to collaborate on answers, find solutions, and get ideas about the products and services we value. It only takes a minute to get started! Just sign in with SSO using your GitHub account.
## Newsletter
Sign up for [our newsletter][newsletter] that covers everything on our technology radar. Receive updates on what we're up to on GitHub as well as awesome new projects we discover.
## Office Hours
[Join us every Wednesday via Zoom][office_hours] for our weekly "Lunch & Learn" sessions. It's **FREE** for everyone!
[![zoom](https://img.cloudposse.com/fit-in/200x200/https://cloudposse.com/wp-content/uploads/2019/08/Powered-by-Zoom.png")][office_hours]
## Contributing
### Bug Reports & Feature Requests
Please use the [issue tracker](https://github.com/cloudposse/terraform-null-label/issues) to report any bugs or file feature requests.
### Developing
If you are interested in being a contributor and want to get involved in developing this project or [help out](https://cpco.io/help-out) with our other projects, we would love to hear from you! Shoot us an [email][email].
In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.
1. **Fork** the repo on GitHub
2. **Clone** the project to your own machine
3. **Commit** changes to your own branch
4. **Push** your work back up to your fork
5. Submit a **Pull Request** so that we can review your changes
**NOTE:** Be sure to merge the latest changes from "upstream" before making a pull request!
## Copyright
Copyright © 2017-2021 [Cloud Posse, LLC](https://cpco.io/copyright)
## License
[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
See [LICENSE](LICENSE) for full details.
```text
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
https://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
```
## Trademarks
All other trademarks referenced herein are the property of their respective owners.
## About
This project is maintained and funded by [Cloud Posse, LLC][website]. Like it? Please let us know by [leaving a testimonial][testimonial]!
[![Cloud Posse][logo]][website]
We're a [DevOps Professional Services][hire] company based in Los Angeles, CA. We ❤️ [Open Source Software][we_love_open_source].
We offer [paid support][commercial_support] on all of our projects.
Check out [our other projects][github], [follow us on twitter][twitter], [apply for a job][jobs], or [hire us][hire] to help with your cloud strategy and implementation.
### Contributors
<!-- markdownlint-disable -->
| [![Erik Osterman][osterman_avatar]][osterman_homepage]<br/>[Erik Osterman][osterman_homepage] | [![Andriy Knysh][aknysh_avatar]][aknysh_homepage]<br/>[Andriy Knysh][aknysh_homepage] | [![Igor Rodionov][goruha_avatar]][goruha_homepage]<br/>[Igor Rodionov][goruha_homepage] | [![Sergey Vasilyev][s2504s_avatar]][s2504s_homepage]<br/>[Sergey Vasilyev][s2504s_homepage] | [![Michael Pereira][MichaelPereira_avatar]][MichaelPereira_homepage]<br/>[Michael Pereira][MichaelPereira_homepage] | [![Jamie Nelson][Jamie-BitFlight_avatar]][Jamie-BitFlight_homepage]<br/>[Jamie Nelson][Jamie-BitFlight_homepage] | [![Vladimir][SweetOps_avatar]][SweetOps_homepage]<br/>[Vladimir][SweetOps_homepage] | [![Daren Desjardins][darend_avatar]][darend_homepage]<br/>[Daren Desjardins][darend_homepage] | [![Maarten van der Hoef][maartenvanderhoef_avatar]][maartenvanderhoef_homepage]<br/>[Maarten van der Hoef][maartenvanderhoef_homepage] | [![Adam Tibbing][tibbing_avatar]][tibbing_homepage]<br/>[Adam Tibbing][tibbing_homepage] |
|---|---|---|---|---|---|---|---|---|---|
<!-- markdownlint-restore -->
[osterman_homepage]: https://github.com/osterman
[osterman_avatar]: https://img.cloudposse.com/150x150/https://github.com/osterman.png
[aknysh_homepage]: https://github.com/aknysh
[aknysh_avatar]: https://img.cloudposse.com/150x150/https://github.com/aknysh.png
[goruha_homepage]: https://github.com/goruha
[goruha_avatar]: https://img.cloudposse.com/150x150/https://github.com/goruha.png
[s2504s_homepage]: https://github.com/s2504s
[s2504s_avatar]: https://img.cloudposse.com/150x150/https://github.com/s2504s.png
[MichaelPereira_homepage]: https://github.com/MichaelPereira
[MichaelPereira_avatar]: https://img.cloudposse.com/150x150/https://github.com/MichaelPereira.png
[Jamie-BitFlight_homepage]: https://github.com/Jamie-BitFlight
[Jamie-BitFlight_avatar]: https://img.cloudposse.com/150x150/https://github.com/Jamie-BitFlight.png
[SweetOps_homepage]: https://github.com/SweetOps
[SweetOps_avatar]: https://img.cloudposse.com/150x150/https://github.com/SweetOps.png
[darend_homepage]: https://github.com/darend
[darend_avatar]: https://img.cloudposse.com/150x150/https://github.com/darend.png
[maartenvanderhoef_homepage]: https://github.com/maartenvanderhoef
[maartenvanderhoef_avatar]: https://img.cloudposse.com/150x150/https://github.com/maartenvanderhoef.png
[tibbing_homepage]: https://github.com/tibbing
[tibbing_avatar]: https://img.cloudposse.com/150x150/https://github.com/tibbing.png
[![README Footer][readme_footer_img]][readme_footer_link]
[![Beacon][beacon]][website]
[logo]: https://cloudposse.com/logo-300x69.svg
[docs]: https://cpco.io/docs?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=docs
[website]: https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=website
[github]: https://cpco.io/github?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=github
[jobs]: https://cpco.io/jobs?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=jobs
[hire]: https://cpco.io/hire?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=hire
[slack]: https://cpco.io/slack?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=slack
[linkedin]: https://cpco.io/linkedin?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=linkedin
[twitter]: https://cpco.io/twitter?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=twitter
[testimonial]: https://cpco.io/leave-testimonial?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=testimonial
[office_hours]: https://cloudposse.com/office-hours?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=office_hours
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[email]: https://cpco.io/email?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=email
[commercial_support]: https://cpco.io/commercial-support?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=commercial_support
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[terraform_modules]: https://cpco.io/terraform-modules?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-null-label&utm_content=terraform_modules
[readme_header_img]: https://cloudposse.com/readme/header/img
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View File

@ -0,0 +1,618 @@
name: terraform-null-label
tags:
- aws
- terraform
- terraform-modules
- naming-convention
- name
- namespace
- stage
categories:
- terraform-modules/supported
license: APACHE2
github_repo: cloudposse/terraform-null-label
badges:
- name: Latest Release
image: https://img.shields.io/github/release/cloudposse/terraform-null-label.svg
url: https://github.com/cloudposse/terraform-null-label/releases/latest
- name: Slack Community
image: https://slack.cloudposse.com/badge.svg
url: https://slack.cloudposse.com
related:
- name: terraform-terraform-label
description: Terraform Module to define a consistent naming convention by (namespace,
environment, stage, name, [attributes])
url: https://github.com/cloudposse/terraform-terraform-label
description: |-
Terraform module designed to generate consistent names and tags for resources. Use `terraform-null-label` to implement a strict naming convention.
This module generates names using the following convention by default: `{namespace}-{environment}-{stage}-{name}-{attributes}`.
However, it is highly configurable. The delimiter (e.g. `-`) is configurable. Each label item is optional (although you must provide at least one).
So if you prefer the term `stage` to `environment`
you can exclude environment and the label `id` will look like `{namespace}-{stage}-{name}-{attributes}`.
- If attributes are excluded but `namespace`, `stage`, and `environment` are included, `id` will look like `{namespace}-{environment}-{stage}-{name}`.
- If you want the attributes in a different order, you can specify that, too, with the `label_order` list.
- You can set a maximum length for the name, and the module will create a unique name that fits within that length.
- You can control the letter case of the generated labels which make up the `id` using `var.label_value_case`.
- The labels are also exported as tags. You can control the case of the tag names (keys) using `var.label_tag_case`.
It's recommended to use one `terraform-null-label` module for every unique resource of a given resource type.
For example, if you have 10 instances, there should be 10 different labels.
However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.
All [Cloud Posse modules](https://github.com/cloudposse?utf8=%E2%9C%93&q=terraform-&type=&language=) use this module to ensure resources can be instantiated multiple times within an account and without conflict.
**NOTE:** The `null` originally referred to the primary Terraform [provider](https://www.terraform.io/docs/providers/null/index.html) used in this module.
With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.
- Releases of this module from `0.23.0` onward only work with Terraform 0.13 or newer.
- Releases of this module from `0.12.0` through `0.22.1` support `HCL2` and are compatible with Terraform 0.12 or newer.
- Releases of this module prior to `0.12.0` are compatible with earlier versions of terraform like Terraform 0.11.
usage: |-
### Defaults
Cloud Posse Terraform modules share a common `context` object that is meant to be passed from module to module.
The context object is a single object that contains all the input values for `terraform-null-label`.
However, each input value can also be specified individually by name as a standard Terraform variable,
and the value of those variables, when set to something other than `null`, will override the value
in the context object. In order to allow chaining of these objects, where the context object input to one
module is transformed and passed to the next module, all the variables default to `null` or empty collections.
The actual default values used when nothing is explicitly set are describe in the documentation below.
For example, the default value of `delimiter` is shown as `null`, but if you leave it set to null,
`terraform-null-label` will actually use the default delimiter `-` (hyphen).
A non-obvious but intentional consequence of this design is that once a module sets a non-default value,
future modules in the chain cannot reset the value back to the original default. Insted, the new setting
becomes the new default for downstream modules. Also, collections are not overwritten, they are merged,
so once a tag is added, it will remain in the tag set and cannot be removed, although its value can
be overwritten.
### Simple Example
```hcl
module "eg_prod_bastion_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["public"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
```
This will create an `id` with the value of `eg-prod-bastion-public` because when generating `id`, the default order is `namespace`, `environment`, `stage`, `name`, `attributes`
(you can override it by using the `label_order` variable, see [Advanced Example 3](#advanced-example-3)).
Now reference the label when creating an instance:
```hcl
resource "aws_instance" "eg_prod_bastion_public" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_label.tags
}
```
Or define a security group:
```hcl
resource "aws_security_group" "eg_prod_bastion_public" {
vpc_id = var.vpc_id
name = module.eg_prod_bastion_label.id
tags = module.eg_prod_bastion_label.tags
egress {
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
}
}
```
### Advanced Example
Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.
<details><summary>Click to show</summary>
```hcl
module "eg_prod_bastion_abc_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["abc"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_abc" {
name = module.eg_prod_bastion_abc_label.id
tags = module.eg_prod_bastion_abc_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_abc" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_abc_label.tags
  vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}
module "eg_prod_bastion_xyz_label" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "eg"
stage = "prod"
name = "bastion"
attributes = ["xyz"]
delimiter = "-"
tags = {
"BusinessUnit" = "XYZ",
"Snapshot" = "true"
}
}
resource "aws_security_group" "eg_prod_bastion_xyz" {
name = module.eg_prod_bastion_xyz_label.id
tags = module.eg_prod_bastion_xyz_label.tags
ingress {
from_port = 22
to_port = 22
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
resource "aws_instance" "eg_prod_bastion_xyz" {
instance_type = "t1.micro"
tags = module.eg_prod_bastion_xyz_label.tags
vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}
```
</details>
### Advanced Example 2
Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate:
<details><summary>Click to show</summary>
```hcl
tags = [
{
key = Name,
propagate_at_launch = 1,
value = namespace-stage-name
},
{
key = Namespace,
propagate_at_launch = 1,
value = namespace
},
{
key = Stage,
propagate_at_launch = 1,
value = stage
}
]
```
Autoscaling group using propagating tagging below (full example: [autoscalinggroup](examples/autoscalinggroup/main.tf))
```hcl
################################
# terraform-null-label example #
################################
module "label" {
source = "../../"
namespace = "cp"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}
}
#######################
# Launch template #
#######################
resource "aws_launch_template" "default" {
# terraform-null-label example used here: Set template name prefix
name_prefix = "${module.label.id}-"
image_id = data.aws_ami.amazon_linux.id
instance_type = "t2.micro"
instance_initiated_shutdown_behavior = "terminate"
vpc_security_group_ids = [data.aws_security_group.default.id]
monitoring {
enabled = false
}
# terraform-null-label example used here: Set tags on volumes
tag_specifications {
resource_type = "volume"
tags = module.label.tags
}
}
######################
# Autoscaling group #
######################
resource "aws_autoscaling_group" "default" {
# terraform-null-label example used here: Set ASG name prefix
name_prefix = "${module.label.id}-"
vpc_zone_identifier = data.aws_subnet_ids.all.ids
max_size = "1"
min_size = "1"
desired_capacity = "1"
launch_template = {
id = "aws_launch_template.default.id
version = "$$Latest"
}
# terraform-null-label example used here: Set tags on ASG and EC2 Servers
tags = module.label.tags_as_list_of_maps
}
```
</details>
### Advanced Example 3
See [complete example](./examples/complete) for even more examples.
This example shows how you can pass the `context` output of one label module to the next label_module,
allowing you to create one label that has the base set of values, and then creating every extra label
as a derivative of that.
<details><summary>Click to show</summary>
```hcl
module "label1" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
namespace = "CloudPosse"
environment = "UAT"
stage = "build"
name = "Winston Churchroom"
attributes = ["fire", "water", "earth", "air"]
delimiter = "-"
label_order = ["name", "environment", "stage", "attributes"]
tags = {
"City" = "Dublin"
"Environment" = "Private"
}
}
module "label2" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
context = module.label1.context
name = "Charlie"
stage = "test"
delimiter = "+"
tags = {
"City" = "London"
"Environment" = "Public"
}
}
module "label3" {
source = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
name = "Starfish"
stage = "release"
context = module.label1.context
delimiter = "."
tags = {
"Eat" = "Carrot"
"Animal" = "Rabbit"
}
}
```
This creates label outputs like this:
```hcl
label1 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"id" = "winstonchurchroom-uat-build-fire-water-earth-air"
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"stage" = "build"
}
label1_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Winston Churchroom"
"namespace" = "CloudPosse"
"stage" = "build"
"tags" = {
"City" = "Dublin"
"Environment" = "Private"
}
}
label1_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "-"
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "winstonchurchroom"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9]/"
"stage" = "build"
"tags" = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
}
label1_tags = {
"Attributes" = "fire-water-earth-air"
"City" = "Dublin"
"Environment" = "Private"
"Name" = "winstonchurchroom-uat-build-fire-water-earth-air"
"Namespace" = "cloudposse"
"Stage" = "build"
}
label2 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"id" = "charlie+uat+test+fire+water+earth+air"
"name" = "charlie"
"namespace" = "cloudposse"
"stage" = "test"
}
label2_context = {
"additional_tag_map" = {
"additional_tag" = "yes"
"propagate_at_launch" = "true"
}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "+"
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Charlie"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
"stage" = "test"
"tags" = {
"City" = "London"
"Environment" = "Public"
}
}
label2_tags = {
"Attributes" = "fire+water+earth+air"
"City" = "London"
"Environment" = "Public"
"Name" = "charlie+uat+test+fire+water+earth+air"
"Namespace" = "cloudposse"
"Stage" = "test"
}
label2_tags_as_list_of_maps = [
{
"additional_tag" = "yes"
"key" = "Attributes"
"propagate_at_launch" = "true"
"value" = "fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "City"
"propagate_at_launch" = "true"
"value" = "London"
},
{
"additional_tag" = "yes"
"key" = "Environment"
"propagate_at_launch" = "true"
"value" = "Public"
},
{
"additional_tag" = "yes"
"key" = "Name"
"propagate_at_launch" = "true"
"value" = "charlie+uat+test+fire+water+earth+air"
},
{
"additional_tag" = "yes"
"key" = "Namespace"
"propagate_at_launch" = "true"
"value" = "cloudposse"
},
{
"additional_tag" = "yes"
"key" = "Stage"
"propagate_at_launch" = "true"
"value" = "test"
},
]
label3 = {
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"id" = "starfish.uat.release.fire.water.earth.air"
"name" = "starfish"
"namespace" = "cloudposse"
"stage" = "release"
}
label3_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "UAT"
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "Starfish"
"namespace" = "CloudPosse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
}
}
label3_normalized_context = {
"additional_tag_map" = {}
"attributes" = [
"fire",
"water",
"earth",
"air",
]
"delimiter" = "."
"enabled" = true
"environment" = "uat"
"id_length_limit" = 0
"label_order" = [
"name",
"environment",
"stage",
"attributes",
]
"name" = "starfish"
"namespace" = "cloudposse"
"regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
"stage" = "release"
"tags" = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
}
label3_tags = {
"Animal" = "Rabbit"
"Attributes" = "fire.water.earth.air"
"City" = "Dublin"
"Eat" = "Carrot"
"Environment" = "Private"
"Name" = "starfish.uat.release.fire.water.earth.air"
"Namespace" = "cloudposse"
"Stage" = "release"
}
```
</details>
include:
- docs/targets.md
- docs/terraform.md
contributors:
- name: Erik Osterman
github: osterman
- name: Andriy Knysh
github: aknysh
- name: Igor Rodionov
github: goruha
- name: Sergey Vasilyev
github: s2504s
- name: Michael Pereira
github: MichaelPereira
- name: Jamie Nelson
github: Jamie-BitFlight
- name: Vladimir
github: SweetOps
- name: Daren Desjardins
github: darend
- name: Maarten van der Hoef
github: maartenvanderhoef
- name: Adam Tibbing
github: tibbing

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@ -0,0 +1,12 @@
<!-- markdownlint-disable -->
## Makefile Targets
```text
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
```
<!-- markdownlint-restore -->

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@ -0,0 +1,54 @@
<!-- markdownlint-disable -->
## Requirements
| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
## Providers
No provider.
## Inputs
| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| enabled | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| id\_length\_limit | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
| name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
| namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| tags | Additional tags (e.g. `map('BusinessUnit','XYZ')` | `map(string)` | `{}` | no |
## Outputs
| Name | Description |
|------|-------------|
| additional\_tag\_map | The merged additional\_tag\_map |
| attributes | List of attributes |
| context | Merged but otherwise unmodified input to this module, to be used as context input to other modules.<br>Note: this version will have null values as defaults, not the values actually used as defaults. |
| delimiter | Delimiter between `namespace`, `environment`, `stage`, `name` and `attributes` |
| enabled | True if module is enabled, false otherwise |
| environment | Normalized environment |
| id | Disambiguated ID restricted to `id_length_limit` characters in total |
| id\_full | Disambiguated ID not restricted in length |
| id\_length\_limit | The id\_length\_limit actually used to create the ID, with `0` meaning unlimited |
| label\_order | The naming order actually used to create the ID |
| name | Normalized name |
| namespace | Normalized namespace |
| normalized\_context | Normalized context of this module |
| regex\_replace\_chars | The regex\_replace\_chars actually used to create the ID |
| stage | Normalized stage |
| tags | Normalized Tag map |
| tags\_as\_list\_of\_maps | Additional tags as a list of maps, which can be used in several AWS resources |
<!-- markdownlint-restore -->

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namespace = "eg"
stage = "prod"
name = "app"
tags = {
BusinessUnit = "Finance"
ManagedBy = "Terraform"
}
additional_tag_map = {
propagate_at_launch = "true"
}

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@ -0,0 +1,216 @@
# DO NOT COPY THIS FILE
#
# This is a specially modified version of this file, since it is used to test
# the unpublished version of this module. Normally you should use a
# copy of the file as explained below.
#
# ONLY EDIT THIS FILE IN github.com/cloudposse/terraform-null-label
# All other instances of this file should be a copy of that one
#
#
# Copy this file from https://github.com/cloudposse/terraform-null-label/blob/master/exports/context.tf
# and then place it in your Terraform module to automatically get
# Cloud Posse's standard configuration inputs suitable for passing
# to Cloud Posse modules.
#
# Modules should access the whole context as `module.this.context`
# to get the input variables with nulls for defaults,
# for example `context = module.this.context`,
# and access individual variables as `module.this.<var>`,
# with final values filled in.
#
# For example, when using defaults, `module.this.context.delimiter`
# will be null, and `module.this.delimiter` will be `-` (hyphen).
#
module "this" {
source = "../.."
enabled = var.enabled
namespace = var.namespace
environment = var.environment
stage = var.stage
name = var.name
delimiter = var.delimiter
attributes = var.attributes
tags = var.tags
additional_tag_map = var.additional_tag_map
label_order = var.label_order
regex_replace_chars = var.regex_replace_chars
id_length_limit = var.id_length_limit
context = var.context
}
# Copy contents of cloudposse/terraform-null-label/variables.tf here
variable "context" {
type = object({
enabled = bool
namespace = string
environment = string
stage = string
name = string
delimiter = string
attributes = list(string)
tags = map(string)
additional_tag_map = map(string)
regex_replace_chars = string
label_order = list(string)
id_length_limit = number
label_key_case = string
label_value_case = string
})
default = {
enabled = true
namespace = null
environment = null
stage = null
name = null
delimiter = null
attributes = []
tags = {}
additional_tag_map = {}
regex_replace_chars = null
label_order = []
id_length_limit = null
label_key_case = null
label_value_case = null
}
description = <<-EOT
Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as `null` to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
EOT
validation {
condition = var.context["label_key_case"] == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
error_message = "Allowed values: `lower`, `title`, `upper`."
}
validation {
condition = var.context["label_value_case"] == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
variable "enabled" {
type = bool
default = null
description = "Set to false to prevent the module from creating any resources"
}
variable "namespace" {
type = string
default = null
description = "Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp'"
}
variable "environment" {
type = string
default = null
description = "Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT'"
}
variable "stage" {
type = string
default = null
description = "Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release'"
}
variable "name" {
type = string
default = null
description = "Solution name, e.g. 'app' or 'jenkins'"
}
variable "delimiter" {
type = string
default = null
description = <<-EOT
Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.
Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
EOT
}
variable "attributes" {
type = list(string)
default = []
description = "Additional attributes (e.g. `1`)"
}
variable "tags" {
type = map(string)
default = {}
description = "Additional tags (e.g. `map('BusinessUnit','XYZ')`"
}
variable "additional_tag_map" {
type = map(string)
default = {}
description = "Additional tags for appending to tags_as_list_of_maps. Not added to `tags`."
}
variable "label_order" {
type = list(string)
default = null
description = <<-EOT
The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
EOT
}
variable "regex_replace_chars" {
type = string
default = null
description = <<-EOT
Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.
If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
EOT
}
variable "id_length_limit" {
type = number
default = null
description = <<-EOT
Limit `id` to this many characters.
Set to `0` for unlimited length.
Set to `null` for default, which is `0`.
Does not affect `id_full`.
EOT
}
variable "label_key_case" {
type = string
default = null
description = <<-EOT
The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.
Possible values: `lower`, `title`, `upper`.
Default value: `title`.
EOT
validation {
condition = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
error_message = "Allowed values: `lower`, `title`, `upper`."
}
}
variable "label_value_case" {
type = string
default = null
description = <<-EOT
The letter case of output label values (also used in `tags` and `id`).
Possible values: `lower`, `title`, `upper` and `none` (no transformation).
Default value: `lower`.
EOT
validation {
condition = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
}
}
#### End of copy of cloudposse/terraform-null-label/variables.tf

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