From e383e800d01cb5ce772ced408b126516dae0a3c2 Mon Sep 17 00:00:00 2001
From: Alexandre Gaillet <alexandre.gaillet@fr.clara.net>
Date: Mon, 19 Feb 2018 17:24:12 +0100
Subject: [PATCH] MON-92 - Update PR by following recommendations

---
 databases/mongodb/README.md         | 38 +++++++++++++++++++++++++++--
 databases/mongodb/inputs.tf         | 32 +++++++++++++++++++++++-
 databases/mongodb/monitors-mongo.tf | 35 +++++++++++++-------------
 inputs.tf                           | 18 --------------
 4 files changed, 85 insertions(+), 38 deletions(-)
 mode change 120000 => 100644 databases/mongodb/inputs.tf

diff --git a/databases/mongodb/README.md b/databases/mongodb/README.md
index 8407e2a..0ee13b3 100644
--- a/databases/mongodb/README.md
+++ b/databases/mongodb/README.md
@@ -1,8 +1,10 @@
-###MongoDB Monitors
+AWS MongoDB Service DataDog monitors
+==========================================
 
 Link to integration documentation :
 
-``https://docs.datadoghq.com/integrations/mongo/``
+[https://docs.datadoghq.com/integrations/mongo/](https://docs.datadoghq.com/integrations/mongo/)
+
 
 **Prepare your ReplicaSet** :
 
@@ -46,3 +48,35 @@ Metrics are :
 0: The replicaSet is KO  
 
 This monitor will trigger an alert for each ReplicaSet.
+
+
+How to use this module
+----------------------
+
+```
+module "datadog-monitors-aws-mongodb" {
+  source = "git::ssh://git@bitbucket.org/morea/terraform.feature.datadog.git//databases/mongodb?ref={revision}"
+
+  message     = "${module.datadog-message-alerting.alerting-message}"
+  environment = "${var.environment}"
+
+}
+```
+
+Purpose
+-------
+
+Creates a DataDog monitors with the following checks : 
+* Mongodb ReplicaSet status
+
+Inputs
+------
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| environment | Architecture Environment | string | - | yes |
+| evaluation_delay | Delay in seconds for the metric evaluation | string | `600` | no |
+| filter_tags_custom | Tags used 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 an alert is triggered | string | - | yes |
+| replica_status_critical | The ReplicaSet status is DOWN | string | `0` | no |
diff --git a/databases/mongodb/inputs.tf b/databases/mongodb/inputs.tf
deleted file mode 120000
index cdfc6c6..0000000
--- a/databases/mongodb/inputs.tf
+++ /dev/null
@@ -1 +0,0 @@
-../../inputs.tf
\ No newline at end of file
diff --git a/databases/mongodb/inputs.tf b/databases/mongodb/inputs.tf
new file mode 100644
index 0000000..e5e1cc6
--- /dev/null
+++ b/databases/mongodb/inputs.tf
@@ -0,0 +1,31 @@
+# Global Terraform
+variable "environment" {
+  description = "Architecture Environment"
+  type        = "string"
+}
+
+# Global DataDog
+variable "evaluation_delay" {
+  description = "Delay in seconds for the metric evaluation"
+  default     = 600
+}
+
+variable "message" {
+  description = "Message sent when an alert is triggered"
+}
+
+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     = "*"
+}
+
+##MongoDB
+variable "replica_status_critical" {
+  description = "The ReplicaSet status is DOWN"
+  default     = 0
+}
diff --git a/databases/mongodb/monitors-mongo.tf b/databases/mongodb/monitors-mongo.tf
index 7a0fdc9..86d25cf 100644
--- a/databases/mongodb/monitors-mongo.tf
+++ b/databases/mongodb/monitors-mongo.tf
@@ -1,34 +1,35 @@
-module "message" {
-  source              = "../../common/alerting-message"
-  oncall_24x7         = "${var.hno_escalation_group}"
-  oncall_office_hours = "${var.ho_escalation_group}"
+data "template_file" "filter" {
+  template = "$${filter}"
+
+  vars {
+    filter = "${var.filter_tags_use_defaults == "true" ? format("dd_monitoring:enabled,dd_monitoring_mongodb:enabled,env:%s", var.environment) : "${var.filter_tags_custom}"}"
+  }
 }
 
-resource "datadog_monitor" "Mongodb_ReplicaSet_State" {
-  name    = "[${var.env}] Replica Set heath for {{ replset_name }}"
-  message = "${module.message.alerting-message}"
+resource "datadog_monitor" "mongodb_replicaset_state" {
+  name    = "[${var.environment}] Replica Set heath for {{ replset_name }}"
+  message = "${var.message}"
 
   query = <<EOF
       avg(last_5m): (
-        avg:mongodb.replset.health{dd_monitoring:enabled,dd_monitoring_mongodb,env:${var.env}} by {replset_name}
-      ) == ${var.mongo_config["critical"]}
+        avg:mongodb.replset.health{${data.template_file.filter.rendered}} by {region,replset_name}
+      ) == ${var.replica_status_critical}
   EOF
 
-  type = "query alert"
+  type = "metric alert"
 
   thresholds {
-    ok       = "${var.mongo_config["ok"]}"
-    critical = "${var.mongo_config["critical"]}"
+    critical = "${var.replica_status_critical}"
   }
 
   notify_no_data      = true
-  renotify_interval   = 15
-  evaluation_delay    = "${var.mongo_config["delay"]}"
+  renotify_interval   = 0
+  evaluation_delay    = "${var.evaluation_delay}"
+  new_host_delay      = "${var.evaluation_delay}"
   notify_audit        = false
   timeout_h           = 0
   include_tags        = true
-  locked              = false
-  require_full_window = true
+  require_full_window = false
 
-  tags = ["env:${var.env}", "type:mongodb"]
+  tags = ["env:${var.environment}", "resource:mongodb", "team:aws", "provider:aws"]
 }
diff --git a/inputs.tf b/inputs.tf
index 413a6f4..3571c39 100644
--- a/inputs.tf
+++ b/inputs.tf
@@ -60,8 +60,6 @@ variable "rds_cpu_threshold" {
 }
 
 variable "rds_mem_threshold" {
-  type = "map"
-
   default = {
     warning  = 20
     critical = 10
@@ -83,8 +81,6 @@ variable "elb_config" {
 }
 
 variable "elb_5xx_threshold" {
-  type = "map"
-
   default = {
     warning  = 5
     critical = 10
@@ -92,8 +88,6 @@ variable "elb_5xx_threshold" {
 }
 
 variable "elb_4xx_threshold" {
-  type = "map"
-
   default = {
     warning  = 5
     critical = 10
@@ -138,15 +132,3 @@ variable "php_fpm_busy_threshold" {
     critical = 0.9
   }
 }
-
-##MongoDB
-variable "mongo_config" {
-  description = "Critical means the ReplicaSet is DOWN and OK means the ReplicaSet is UP"
-  type = "map"
-
-  default = {
-    delay          = 0
-    critical       = 0
-    ok             = 1
-  }
-}