Add multi az

.gitignore

@@ -1,3 +1,4 @@
 # Compiled files
 *.tfstate
 *.tfstate.backup
+.terraform

main.tf

@@ -15,6 +15,7 @@ resource "aws_elasticache_replication_group" "redis" {
   number_cache_clusters         = var.redis_clusters
   node_type                     = var.redis_node_type
   automatic_failover_enabled    = var.redis_failover
+  multi_az_enabled              = var.multi_az_enabled
   engine_version                = var.redis_version
   port                          = var.redis_port
   parameter_group_name          = aws_elasticache_parameter_group.redis_parameter_group.id

security_groups.tf

@@ -26,3 +26,13 @@ resource "aws_security_group_rule" "redis_networks_ingress" {
   cidr_blocks       = var.allowed_cidr
   security_group_id = aws_security_group.redis_security_group.id
 }
+
+resource "aws_security_group_rule" "redis_replication_egress" {
+  count             = var.is_migration_cluster ? 1 : 0
+  type              = "egress"
+  from_port         = 0
+  to_port           = 0
+  protocol          = "-1"
+  cidr_blocks       = ["0.0.0.0/0"]
+  security_group_id = aws_security_group.redis_security_group.id
+}

variables.tf

@@ -47,11 +47,24 @@ variable "redis_clusters" {
   type        = string
 }
 
+variable "multi_az_enabled" {
+  description = "Specifies whether to enable Multi-AZ Support for the replication group"
+  type = bool
+  default = false
+}
+
 variable "redis_failover" {
+  description = "Specifies whether a read-only replica will be automatically promoted to read/write primary if the existing primary fails"
   type    = bool
   default = false
 }
 
+variable "is_migration_cluster" {
+  description = "Specifies whether this is a cluster for replicating other EC2 redis. Useful for migrations."
+  type = bool
+  default = false
+}
+
 variable "redis_node_type" {
   description = "Instance type to use for creating the Redis cache clusters"
   type        = string

versions.tf

@@ -0,0 +1,11 @@
+terraform {
+  required_version = ">= 0.12"
+}
+
+provider "aws" {
+  version = "~> 3.31"
+}
+
+provider "random" {
+  version = "~> 3.1"
+}