feat: Add redis node type as variable (#84)

* fix: update README

* Adds redis node type as env var

* add default

README.md

@@ -99,7 +99,13 @@ resources that lack official modules.
 
 ### A note on updating EKS cluster version
 
-Users can update the EKS cluster version to the latest version offered by AWS. This can be done using the environment variable `eks_cluster_version`. Note that, cluster and nodegroup version updates can only be done in increments of one version at a time. For example, if your current cluster version is `1.21` and the latest version available is `1.24` - you'd need to first update `1.21` to `1.22`, run `terraform apply`, then upgrade to `1.23`, run `tf apply` and finally to `1.24`, run `tf apply`. You will not be able to upgrade directly from `1.21` to `1.24`.
+Users can update the EKS cluster version to the latest version offered by AWS. This can be done using the environment variable `eks_cluster_version`. Note that, cluster and nodegroup version updates can only be done in increments of one version at a time. For example, if your current cluster version is `1.21` and the latest version available is `1.24` - you'd need to:
+
+- Update `1.21` to `1.22`, run `terraform apply`,
+- then upgrade to `1.23`, run `tf apply` and
+- finally to `1.24`, run `tf apply`.
+
+You will not be able to upgrade directly from `1.21` to `1.24`.
 
 <!-- BEGIN_TF_DOCS -->
 ## Requirements

main.tf

@@ -186,6 +186,7 @@ module "redis" {
   vpc_id                  = local.network_id
   redis_subnet_group_name = local.network_elasticache_subnet_group_name
   vpc_subnets_cidr_blocks = module.networking.elasticache_subnet_cidrs
+  elasticache_node_type   = var.elasticache_node_type
 
   kms_key_arn = local.kms_key_arn
 }

modules/redis/main.tf

@@ -8,7 +8,7 @@ resource "aws_elasticache_replication_group" "default" {
   number_cache_clusters         = 2
   port                          = 6379
 
-  node_type            = "cache.t2.medium"
+  node_type            = var.node_type
   parameter_group_name = "default.redis6.x"
   engine_version       = local.redis_version
 

modules/redis/variables.tf

@@ -29,4 +29,9 @@ variable "vpc_subnets_cidr_blocks" {
 variable "kms_key_arn" {
   description = "The ARN for the KMS encryption key."
   type        = string
-}
+}
+
+variable "node_type" {
+  description = "The type of the redis node to deploy"
+  type        = string
+}

variables.tf

@@ -297,3 +297,9 @@ variable "create_elasticache" {
   description = "Boolean indicating whether to provision an elasticache instance (true) or not (false)."
   default     = false
 }
+
+variable "elasticache_node_type" {
+  description = "The type of the redis cache node to deploy"
+  type        = string
+  default     = "cache.t2.medium"
+}