Removed unwanted variable and added CW alerts description

Author: alpha-p-2

README.md

@@ -22,6 +22,9 @@ Features
 
   7. Logging and Monitoring: Easily configure logging destinations for slow logs and engine logs, allowing you to monitor the performance and troubleshoot any issues efficiently.
 
+  8. CloudWatch Alerts: Set up CloudWatch alarms to monitor the health and performance of your Redis cluster. Integrate these alarms with AWS Simple Notification Service (SNS) to receive real-time alerts. Use AWS Lambda functions to customize your alerting logic, and send notifications to Slack channels for immediate visibility into your Redis cluster's status.
+
+
 ## Uses Example
 
 ```hcl
@@ -41,7 +44,6 @@ module "redis" {
   availability_zones               = 2
   automatic_failover_enabled       = true
   snapshot_retention_limit         = 7
-  at_rest_encryption_enabled       = true
   transit_encryption_enabled       = false
   notification_topic_arn           = null
   allowed_security_groups          = [sg-0132a18skaf]

main.tf

@@ -48,7 +48,6 @@ resource "aws_elasticache_replication_group" "redis" {
   multi_az_enabled            = var.multi_az_enabled
   kms_key_id                  = var.kms_key_arn
   auth_token                  = var.transit_encryption_enabled ? random_password.password.result : null
-  at_rest_encryption_enabled  = var.at_rest_encryption_enabled
   transit_encryption_enabled  = var.transit_encryption_enabled
   notification_topic_arn      = var.notification_topic_arn
   maintenance_window          = var.maintenance_window
@@ -166,7 +165,7 @@ resource "aws_cloudwatch_metric_alarm" "cache_cpu" {
   }
 
   alarm_actions = [aws_sns_topic.slack_topic[0].arn]
-  ok_actions    = var.ok_actions
+  ok_actions    = [aws_sns_topic.slack_topic[0].arn]
   depends_on    = [aws_sns_topic.slack_topic]
 
   tags = merge(
@@ -193,7 +192,7 @@ resource "aws_cloudwatch_metric_alarm" "cache_memory" {
   }
 
   alarm_actions = [aws_sns_topic.slack_topic[0].arn]
-  ok_actions    = var.ok_actions
+  ok_actions    = [aws_sns_topic.slack_topic[0].arn]
   depends_on    = [aws_sns_topic.slack_topic]
 
   tags = merge(