Add snapshot name argument

Author: kurtmc

main.tf

@@ -97,6 +97,7 @@ resource "aws_elasticache_replication_group" "default" {
   transit_encryption_enabled    = var.transit_encryption_enabled
   kms_key_id                    = var.at_rest_encryption_enabled ? var.kms_key_id : null
   snapshot_arns                 = var.snapshot_arns
+  snapshot_name                 = var.snapshot_name
   snapshot_window               = var.snapshot_window
   snapshot_retention_limit      = var.snapshot_retention_limit
   apply_immediately             = var.apply_immediately

variables.tf

@@ -181,6 +181,12 @@ variable "snapshot_arns" {
   default     = []
 }
 
+variable "snapshot_name" {
+  type        = string
+  description = "(Optional) The name of a snapshot from which to restore data into the new node group. Changing the snapshot_name forces a new resource."
+  default     = null
+}
+
 variable "snapshot_window" {
   type        = string
   description = "The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster."
@@ -217,8 +223,8 @@ variable "cloudwatch_metric_alarms_enabled" {
   default     = false
 }
 
-variable egress_cidr_blocks {
-  type        = list
+variable "egress_cidr_blocks" {
+  type        = list(string)
   default     = ["0.0.0.0/0"]
   description = "Outbound traffic address"
 }