fix: Add AWS IAM Redis passwordless authentication support

- Add redis_passwordless_aws_use_iam variable to variables.tf
- Pass redis_passwordless_aws_use_iam to runtime_container_engine_config module
- Enables AWS IAM authentication for Redis passwordless access via ElastiCache

Author: raviharshicorp

main.tf

@@ -312,12 +312,13 @@ module "runtime_container_engine_config" {
   s3_server_side_encryption_kms_key_id = local.kms_key_arn
   s3_use_instance_profile              = var.aws_access_key_id == null ? "1" : "0"
 
-  redis_host                 = local.redis.hostname
-  redis_user                 = local.redis.username
-  redis_password             = local.redis.password
-  redis_use_tls              = local.redis.use_tls
-  redis_use_auth             = local.redis.use_password_auth
-  redis_use_sentinel         = var.enable_redis_sentinel
+  redis_host                    = local.redis.hostname
+  redis_user                    = local.redis.username
+  redis_password                = local.redis.password
+  redis_use_tls                 = local.redis.use_tls
+  redis_use_auth                = local.redis.use_password_auth
+  redis_passwordless_aws_use_iam = var.redis_passwordless_aws_use_iam
+  redis_use_sentinel            = var.enable_redis_sentinel
   redis_sentinel_hosts       = local.redis.sentinel_hosts
   redis_sentinel_leader_name = local.redis.sentinel_leader
   redis_sentinel_user        = local.redis.sentinel_username

variables.tf

@@ -182,6 +182,12 @@ variable "redis_use_password_auth" {
   default     = false
 }
 
+variable "redis_passwordless_aws_use_iam" {
+  type        = bool
+  description = "Whether to use AWS IAM authentication for Redis passwordless access."
+  default     = false
+}
+
 variable "redis_authentication_mode" {
   description = "The authentincation mode for redis server instances.  Must be one of [USER_AND_PASSWORD, PASSWORD, NONE]."
   type        = string
@@ -208,12 +214,6 @@ variable "sentinel_leader" {
   description = "The name of the Redis Sentinel leader"
 }
 
-variable "redis_enable_iam_auth" {
-  type        = bool
-  description = "Whether to enable IAM authentication for Redis. Used for passwordless authentication."
-  default     = false
-}
-
 # Postgres
 # --------
 variable "db_name" {