Merge pull request #29 from clouddrove/redis-1

add cloudwatch_log_group and enabled redis logs

Author: Om Sharma

_example/redis/example.tf

@@ -49,7 +49,7 @@ module "redis" {
 
   replication_enabled        = true
   engine                     = "redis"
-  engine_version             = "6.x"
+  engine_version             = "6.2"
   parameter_group_name       = "default.redis6.x"
   port                       = 6379
   node_type                  = "cache.t2.micro"
@@ -58,6 +58,19 @@ module "redis" {
   availability_zones         = ["eu-west-1a", "eu-west-1b"]
   auto_minor_version_upgrade = true
   number_cache_clusters      = 2
+
+  log_delivery_configuration = [
+    {
+      destination_type = "cloudwatch-logs"
+      log_format       = "json"
+      log_type         = "slow-log"
+    },
+    {
+      destination_type = "cloudwatch-logs"
+      log_format       = "json"
+      log_type         = "engine-log"
+    }
+  ]
   extra_tags = {
     Application = "CloudDrove"
   }

main.tf

@@ -20,6 +20,12 @@ module "labels" {
   extra_tags  = var.extra_tags
 }
 
+resource "aws_cloudwatch_log_group" "default" {
+  count = var.enable && length(var.log_delivery_configuration) > 0 ? 1 : 0
+  name  = format("logs-%s", module.labels.id)
+  tags  = module.labels.tags
+}
+
 # Module      : Elasticache Subnet Group
 # Description : Terraform module which creates Subnet Group for Elasticache.
 resource "aws_elasticache_subnet_group" "default" {
@@ -62,8 +68,19 @@ resource "aws_elasticache_replication_group" "default" {
   kms_key_id                    = var.kms_key_id
   tags                          = module.labels.tags
 
+  dynamic "log_delivery_configuration" {
+    for_each = var.log_delivery_configuration
+
+    content {
+      destination      = lookup(log_delivery_configuration.value, "destination", join("", aws_cloudwatch_log_group.default.*.name))
+      destination_type = lookup(log_delivery_configuration.value, "destination_type", null)
+      log_format       = lookup(log_delivery_configuration.value, "log_format", null)
+      log_type         = lookup(log_delivery_configuration.value, "log_type", null)
+    }
+  }
 }
 
+
 # Module      : Elasticache Replication Group
 # Description : Terraform module which creates cluster for Elasticache Redis.
 resource "aws_elasticache_replication_group" "cluster" {
@@ -123,4 +140,6 @@ resource "aws_elasticache_cluster" "default" {
   preferred_availability_zones = slice(var.availability_zones, 0, var.num_cache_nodes)
   maintenance_window           = var.maintenance_window
   tags                         = module.labels.tags
+
 }
+

variables.tf

@@ -235,3 +235,9 @@ variable "parameter_group_name" {
   default     = "default.redis5.0"
   description = "The name of the parameter group to associate with this replication group. If this argument is omitted, the default cache parameter group for the specified engine is used."
 }
+
+variable "log_delivery_configuration" {
+  type        = list(map(any))
+  default     = []
+  description = "The log_delivery_configuration block allows the streaming of Redis SLOWLOG or Redis Engine Log to CloudWatch Logs or Kinesis Data Firehose. Max of 2 blocks."
+}