From 3cd7bbf68943d0bf8e507331fda9b40badea2ab4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Paulo=20J=C3=BAnior=20do=20Nascimento=20Lima?=
 <paulo.lima@grupoboticario.com.br>
Date: Fri, 21 Jan 2022 08:48:52 -0300
Subject: [PATCH] Add elasticache in subnet group instead of creating a new

---
 main.tf      | 3 ++-
 variables.tf | 7 +++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/main.tf b/main.tf
index a2f056e..5881b98 100644
--- a/main.tf
+++ b/main.tf
@@ -6,7 +6,7 @@
 resource "aws_elasticache_replication_group" "default" {
   engine               = "redis"
   parameter_group_name = aws_elasticache_parameter_group.default.name
-  subnet_group_name    = aws_elasticache_subnet_group.default.name
+  subnet_group_name    = var.subnet_group_name == null ? aws_elasticache_subnet_group.default[0].name : var.subnet_group_name
   security_group_ids   = [aws_security_group.default.id]
 
   # The replication group identifier. This parameter is stored as a lowercase string.
@@ -104,6 +104,7 @@ resource "aws_elasticache_parameter_group" "default" {
 
 # https://www.terraform.io/docs/providers/aws/r/elasticache_subnet_group.html
 resource "aws_elasticache_subnet_group" "default" {
+  count       = var.subnet_group_name == null ? 1 : 0
   name        = var.name
   subnet_ids  = var.subnet_ids
   description = var.description
diff --git a/variables.tf b/variables.tf
index 5e5883b..5d2459f 100644
--- a/variables.tf
+++ b/variables.tf
@@ -16,11 +16,18 @@ variable "node_type" {
 variable "subnet_ids" {
   type        = list(string)
   description = "List of VPC Subnet IDs for the cache subnet group."
+  default     = []
 }
 
 variable "vpc_id" {
   type        = string
   description = "VPC Id to associate with Redis ElastiCache."
+  default     = ""
+}
+
+variable "subnet_group_name" {
+  type        = string
+  description = "VPC Id to associate with Redis ElastiCache."
 }
 
 variable "source_cidr_blocks" {