initial commit

modules/ManagementGovernance/Monitoring.Redis/README.md

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+# Monitoring module 
+This module deploys the default cloudwatch metric monitoring
+
+## Notes
+Terraform lifecycle ignores tags to speed up terraform subsequent update. Cloudwatch alarm tags cannot be read on aws console anyway.
+
+## Example 
+```terraform
+module "redis-instances" {
+  source        = "../../modules/util/resource-list"
+  resource-type = "redis"
+}
+
+module "redis-monitoring" {
+  cw-alarm-prefix                         = local.cw-alarm-prefix
+  for_each                                = module.redis-instances.result-set
+  source                                  = "../../modules/ManagementGovernance/Monitoring.Redis"
+  default-tags                            = local.default-tags
+  redis-cluster-id                        = each.value
+  threshold-EngineCPUUtilization          = 90
+  threshold-DatabaseMemoryUsagePercentage = 90
+  threshold-CacheHitRate                  = 3
+  actions-enabled                         = var.actions-enabled
+  sns-targets = var.sns-targets
+}
+```

modules/ManagementGovernance/Monitoring.Redis/main.tf

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+resource "aws_cloudwatch_metric_alarm" "redis-alarms" {
+  for_each                  = var.settings
+  alarm_name                = "${each.value["ecccode"]}-Redis_${var.redis-cluster-id}-${each.value["metric"]}"
+  comparison_operator       = each.value["comparison_operator"]
+  evaluation_periods        = each.value["evaluation_periods"]
+  metric_name               = each.value["metric"]
+  period                    = each.value["period"]
+  statistic                 = each.value["statistic"]
+  threshold                 = each.value["threshold"]
+  alarm_description         = "ElastiCache:${each.value["metric"]}"
+  namespace                 = "AWS/ElastiCache"
+  insufficient_data_actions = []
+  actions_enabled           = var.actions-enabled
+  alarm_actions             = [each.value["action"]]
+  ok_actions                = [each.value["action"]]
+  treat_missing_data        = "notBreaching"
+  dimensions = {
+    CacheClusterId = var.redis-cluster-id
+  }
+
+}

modules/ManagementGovernance/Monitoring.Redis/provider.tf

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+terraform {
+  required_version = "~> 1.3.0"
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 4.36.1"
+    }
+  }
+}

modules/ManagementGovernance/Monitoring.Redis/variables.tf

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+variable "cw-alarm-prefix" {}
+variable "actions-enabled" {}
+variable "redis-cluster-id" {}
+variable "settings" {}