MON-114 add kubernetes cluster monitors

README.md

@@ -77,6 +77,7 @@ The `//` is very important, it's a terraform specific syntax used to separate gi
 - [caas](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/caas/)
 	- [kubernetes](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/caas/kubernetes/)
 		- [ark](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/caas/kubernetes/ark/)
+		- [cluster](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/caas/kubernetes/cluster/)
 		- [ingress](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/caas/kubernetes/ingress/)
 			- [vts](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/caas/kubernetes/ingress/vts/)
 - [cloud](https://git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors/tree/master/cloud/)

caas/kubernetes/cluster/README.md

@@ -0,0 +1,48 @@
+# CAAS KUBERNETES CLUSTER DataDog monitors
+
+## How to use this module
+
+```
+module "datadog-monitors-caas-kubernetes-cluster" {
+  source = "git::ssh://git@git.fr.clara.net/claranet/pt-monitoring/projects/datadog/terraform/monitors.git//caas/kubernetes/cluster?ref={revision}"
+
+  environment = "${var.environment}"
+  message     = "${module.datadog-message-alerting.alerting-message}"
+}
+
+```
+
+## Purpose
+
+Creates DataDog monitors with the following checks:
+
+- Kubernetes API server does not respond
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| apiserver\_enabled | Flag to enable API server monitor | string | `"true"` | no |
+| apiserver\_extra\_tags | Extra tags for API server monitor | list | `[]` | no |
+| apiserver\_message | Custom message for API server monitor | string | `""` | no |
+| apiserver\_silenced | Groups to mute for API server monitor | map | `{}` | no |
+| apiserver\_threshold\_warning | API server monitor (warning threshold) | string | `"3"` | no |
+| environment | Architecture environment | string | n/a | yes |
+| evaluation\_delay | Delay in seconds for the metric evaluation | string | `"15"` | no |
+| filter\_tags\_custom | Tags used for custom filtering when filter_tags_use_defaults is false | string | `"*"` | no |
+| filter\_tags\_custom\_excluded | Tags excluded for custom filtering when filter_tags_use_defaults is false | string | `""` | no |
+| filter\_tags\_use\_defaults | Use default filter tags convention | string | `"true"` | no |
+| message | Message sent when a monitor is triggered | string | n/a | yes |
+| new\_host\_delay | Delay in seconds before monitor new resource | string | `"300"` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| apiserver\_id | id for monitor apiserver |
+
+## Related documentation
+
+* [Datadog metrics](https://docs.datadoghq.com/agent/kubernetes/metrics/)
+* [Datadog documentation](https://docs.datadoghq.com/integrations/kubernetes/)
+* [Datadog Blog](https://www.datadoghq.com/blog/monitor-kubernetes-docker/)

caas/kubernetes/cluster/inputs.tf

@@ -0,0 +1,66 @@
+# Datadog global variables
+
+variable "environment" {
+  description = "Architecture environment"
+}
+
+variable "filter_tags_use_defaults" {
+  description = "Use default filter tags convention"
+  default     = "true"
+}
+
+variable "filter_tags_custom" {
+  description = "Tags used for custom filtering when filter_tags_use_defaults is false"
+  default     = "*"
+}
+
+variable "filter_tags_custom_excluded" {
+  description = "Tags excluded for custom filtering when filter_tags_use_defaults is false"
+  default     = ""
+}
+
+variable "message" {
+  description = "Message sent when a monitor is triggered"
+}
+
+variable "evaluation_delay" {
+  description = "Delay in seconds for the metric evaluation"
+  default     = 15
+}
+
+variable "new_host_delay" {
+  description = "Delay in seconds before monitor new resource"
+  default     = 300
+}
+
+# Datadog monitors variables
+
+variable "apiserver_silenced" {
+  description = "Groups to mute for API server monitor"
+  type        = "map"
+  default     = {}
+}
+
+variable "apiserver_enabled" {
+  description = "Flag to enable API server monitor"
+  type        = "string"
+  default     = "true"
+}
+
+variable "apiserver_extra_tags" {
+  description = "Extra tags for API server monitor"
+  type        = "list"
+  default     = []
+}
+
+variable "apiserver_message" {
+  description = "Custom message for API server monitor"
+  type        = "string"
+  default     = ""
+}
+
+variable "apiserver_threshold_warning" {
+  description = "API server monitor (warning threshold)"
+  type        = "string"
+  default     = 3
+}

caas/kubernetes/cluster/modules.tf

@@ -0,0 +1,9 @@
+module "filter-tags" {
+  source = "../../../common/filter-tags"
+
+  environment                 = "${var.environment}"
+  resource                    = "kubernetes"
+  filter_tags_use_defaults    = "${var.filter_tags_use_defaults}"
+  filter_tags_custom          = "${var.filter_tags_custom}"
+  filter_tags_custom_excluded = "${var.filter_tags_custom_excluded}"
+}

caas/kubernetes/cluster/monitors-k8s-cluster.tf

@@ -0,0 +1,29 @@
+resource "datadog_monitor" "apiserver" {
+  count   = "${var.apiserver_enabled == "true" ? 1 : 0}"
+  name    = "[${var.environment}] Kubernetes API server does not respond"
+  message = "${coalesce(var.apiserver_message, var.message)}"
+
+  type = "service check"
+
+  query = <<EOQ
+    "kube_apiserver_controlplane.up"${module.filter-tags.service_check}.by("apiserver_name").last(6).count_by_status()
+  EOQ
+
+  thresholds = {
+    warning  = "${var.apiserver_threshold_warning}"
+    critical = 5
+  }
+
+  new_host_delay      = "${var.new_host_delay}"
+  notify_no_data      = true
+  renotify_interval   = 0
+  notify_audit        = false
+  timeout_h           = 0
+  include_tags        = true
+  locked              = false
+  require_full_window = true
+
+  silenced = "${var.apiserver_silenced}"
+
+  tags = ["env:${var.environment}", "type:caas", "provider:kubernetes", "resource:kubernetes-node", "team:claranet", "created-by:terraform", "${var.apiserver_extra_tags}"]
+}

caas/kubernetes/cluster/outputs.tf

@@ -0,0 +1,4 @@
+output "apiserver_id" {
+  description = "id for monitor apiserver"
+  value       = "${datadog_monitor.apiserver.*.id}"
+}