MON-110 add No Incoming Record firehose monitor

cloud/aws/kinesis-firehose/README.md

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+AWS Kinesis Firehose DataDog monitors
+==========================================
+
+How to use this module
+----------------------
+
+```
+module "datadog-monitors-aws-firehose" {
+  source = "git::ssh://git@bitbucket.org/morea/terraform.feature.datadog.git//cloud/aws/kinesis-firehose?ref={revision}"
+
+  message = "${module.datadog-message-alerting.alerting-message}"
+  environment = "${var.environment}"
+}
+
+```
+
+Purpose
+-------
+Creates DataDog monitors with the following checks :
+
+* No incoming record
+
+Inputs
+------
+| Name | Description | Type | Default | Required |
+|------|-------------|:----:|:-----:|:-----:|
+| delay | Delay in seconds for the metric evaluation | string | `900` | no |
+| environment | 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 |
+| incoming_records_timeframe | Monitor timeframe for incoming records metrics evaluation [available values: `last_#m` (1, 5, 10, 15, or 30), `last_#h` (1, 2, or 4), or `last_1d`] | string | `last_15m` | no |
+| message | Message sent when an alert is triggered | string | - | yes |
+
+Related documentation
+---------------------
+
+DataDog documentation: [https://docs.datadoghq.com/integrations/amazon_firehose/](https://docs.datadoghq.com/integrations/amazon_firehose/)
+
+AWS Kinesis Firehose metrics documentation: [https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/akf-metricscollected.html](https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/akf-metricscollected.html)

cloud/aws/kinesis-firehose/inputs.tf

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+# Global Terraform
+variable "environment" {
+  description = "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     = "*"
+}
+
+# Kinesis-Firehose
+variable "incoming_records_timeframe" {
+  description = "Monitor timeframe for incoming records metrics evaluation [available values: `last_#m` (1, 5, 10, 15, or 30), `last_#h` (1, 2, or 4), or `last_1d`]"
+  default     = "last_15m"
+}

cloud/aws/kinesis-firehose/monitors-kinesis-firehose.tf

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+data "template_file" "filter" {
+  template = "$${filter}"
+
+  vars {
+    filter = "${var.filter_tags_use_defaults == "true" ? format("dd_monitoring:enabled,dd_aws_firehose:enabled,env:%s", var.environment) : "${var.filter_tags_custom}"}"
+  }
+}
+
+### Kinesis Firehose Incoming records ###
+resource "datadog_monitor" "firehose_incoming_records" {
+  name    = "[${var.environment}] Kinesis Firehose No incoming records"
+  message = "${var.message}"
+
+  type = "metric alert"
+
+  query = <<EOF
+  sum(${var.incoming_records_timeframe}): (
+    avg:aws.firehose.incoming_records{${data.template_file.filter.rendered}} by {region,deliverystreamname}
+  ) <= 0
+EOF
+
+  thresholds {
+    critical = 0
+  }
+
+  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}"
+  no_data_timeframe   = 20
+
+  tags = ["env:${var.environment}", "resource:kinesis-firehose", "team:aws", "provider:aws"]
+}