MON-185 - ServiceBus monitors added

cloud/azure/servicebus/README.md

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+Service Bus Datadog monitor
+===========================
+
+How to use this module
+----------------------
+
+```
+module "datadog-monitors-azure-servicebus" {
+  source = "git::ssh://git@bitbucket.org/morea/terraform.feature.datadog.git//cloud/azure/servicebus?ref={revision}"
+
+  message = "${module.datadog-message-alerting.alerting-message}"
+  environment = "${var.environment}"
+  subscription_id = "${var.subscription_id}"
+}
+```
+
+Purpose
+-------
+Creates a Datadog monitor with the following checks :
+
+* Service status check
+
+Inputs
+------
+
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| delay | Delay in seconds for the metric evaluation | string | `900` | no |
+| environment | Architecture Environment | string | - | yes |
+| 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 |
+| status_message | Custom message for Service Bus status monitor | string | `` | no |
+| status_silenced | Groups to mute for Service Bus status monitor | map | `<map>` | no |
+
+Related documentation
+---------------------
+
+Azure metrics documentation : [https://docs.microsoft.com/fr-fr/azure/monitoring-and-diagnostics/monitoring-supported-metrics#microsoftservicebusnamespaces](https://docs.microsoft.com/fr-fr/azure/monitoring-and-diagnostics/monitoring-supported-metrics#microsoftservicebusnamespaces)

cloud/azure/servicebus/inputs.tf

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+# Global Terraform
+variable "environment" {
+  description = "Architecture Environment"
+  type        = "string"
+}
+
+# Global DataDog
+variable "delay" {
+  description = "Delay in seconds for the metric evaluation"
+  default     = 900
+}
+
+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     = "*"
+}
+
+# Azure Service Bus specific variables
+variable "status_silenced" {
+  description = "Groups to mute for Service Bus status monitor"
+  type        = "map"
+  default     = {}
+}
+
+variable "status_message" {
+  description = "Custom message for Service Bus status monitor"
+  type        = "string"
+  default     = ""
+}

cloud/azure/servicebus/monitors-service-bus.tf

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+data "template_file" "filter" {
+  template = "$${filter}"
+
+  vars {
+    filter = "${var.filter_tags_use_defaults == "true" ? format("dd_monitoring:enabled,dd_azure_servicebus:enabled,env:%s", var.environment) : "${var.filter_tags_custom}"}"
+  }
+}
+
+resource "datadog_monitor" "servicebus_status" {
+  name    = "[${var.environment}] Service Bus is down"
+  message = "${coalesce(var.status_message, var.message)}"
+
+  query = <<EOF
+      avg(last_5m): avg:azure.servicebus_namespaces.status{${data.template_file.filter.rendered}} by {resource_group,region,name} != 1
+      EOF
+
+  type = "metric alert"
+
+  silenced = "${var.status_silenced}"
+
+  notify_no_data      = true
+  evaluation_delay    = "${var.delay}"
+  renotify_interval   = 0
+  notify_audit        = false
+  timeout_h           = 0
+  include_tags        = true
+  locked              = false
+  require_full_window = false
+  new_host_delay      = "${var.delay}"
+
+  tags = ["env:${var.environment}", "resource:servicebus", "team:azure", "provider:azure"]
+}