feat: add memcache_version parameter

modules/memcache/README.md

@@ -13,6 +13,7 @@ A Terraform module for creating a fully functional Google Memorystore (memcache)
 | enable\_apis | Flag for enabling memcache.googleapis.com in your project | `bool` | `true` | no |
 | labels | The resource labels to represent user provided metadata. | `map(string)` | `{}` | no |
 | maintenance\_policy | The maintenance policy for an instance. | <pre>object({<br>    day      = string<br>    duration = string<br>    start_time = object({<br>      hours   = number<br>      minutes = number<br>      seconds = number<br>      nanos   = number<br>    })<br>  })</pre> | `null` | no |
+| memcache\_version | The major version of Memcached software. | `string` | `null` | no |
 | memory\_size\_mb | Memcache memory size in MiB. Defaulted to 1024 | `number` | `1024` | no |
 | name | The ID of the instance or a fully qualified identifier for the instance. | `string` | n/a | yes |
 | node\_count | Number of nodes in the memcache instance. | `number` | `1` | no |

modules/memcache/main.tf

@@ -21,6 +21,7 @@ resource "google_memcache_instance" "self" {
   zones              = var.zones
   name               = var.name
   region             = var.region
+  memcache_version   = var.memcache_version
   authorized_network = var.authorized_network
   node_count         = var.node_count
   display_name       = var.display_name == null ? var.name : var.display_name

modules/memcache/variables.tf

@@ -35,6 +35,12 @@ variable "name" {
   type        = string
 }
 
+variable "memcache_version" {
+  description = "The major version of Memcached software."
+  type        = string
+  default     = null
+}
+
 variable "authorized_network" {
   description = "The full name of the Google Compute Engine network to which the instance is connected. If left unspecified, the default network will be used."
   type        = string