From 350faf0fcf62bdd0e76ddba1e3fb9c7505e0282b Mon Sep 17 00:00:00 2001
From: Alexandre Gaillet <alexandre.gaillet@fr.clara.net>
Date: Fri, 20 Apr 2018 14:51:33 +0200
Subject: [PATCH] MON-185 - ServiceBus monitors added

---
 cloud/azure/servicebus/README.md              | 39 +++++++++++++++++++
 cloud/azure/servicebus/inputs.tf              | 38 ++++++++++++++++++
 .../azure/servicebus/monitors-service-bus.tf  | 32 +++++++++++++++
 3 files changed, 109 insertions(+)
 create mode 100644 cloud/azure/servicebus/README.md
 create mode 100644 cloud/azure/servicebus/inputs.tf
 create mode 100644 cloud/azure/servicebus/monitors-service-bus.tf

diff --git a/cloud/azure/servicebus/README.md b/cloud/azure/servicebus/README.md
new file mode 100644
index 0000000..610794d
--- /dev/null
+++ b/cloud/azure/servicebus/README.md
@@ -0,0 +1,39 @@
+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)
diff --git a/cloud/azure/servicebus/inputs.tf b/cloud/azure/servicebus/inputs.tf
new file mode 100644
index 0000000..3ea3306
--- /dev/null
+++ b/cloud/azure/servicebus/inputs.tf
@@ -0,0 +1,38 @@
+# 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     = ""
+}
diff --git a/cloud/azure/servicebus/monitors-service-bus.tf b/cloud/azure/servicebus/monitors-service-bus.tf
new file mode 100644
index 0000000..0efba50
--- /dev/null
+++ b/cloud/azure/servicebus/monitors-service-bus.tf
@@ -0,0 +1,32 @@
+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"]
+}