feat: support setting maintenance_interval in instance_template

modules/instance_template/README.md

@@ -31,6 +31,7 @@ See the [simple](../../examples/instance_template/simple) for a usage example.
 | ipv6\_access\_config | IPv6 access configurations. Currently a max of 1 IPv6 access configuration is supported. If not specified, the instance will have no external IPv6 Internet access. | <pre>list(object({<br>    network_tier = string<br>  }))</pre> | `[]` | no |
 | labels | Labels, provided as a map | `map(string)` | `{}` | no |
 | machine\_type | Machine type to create, e.g. n1-standard-1 | `string` | `"n1-standard-1"` | no |
+| maintenance\_interval | Specifies the frequency of planned maintenance events | `string` | `null` | no |
 | metadata | Metadata, provided as a map | `map(string)` | `{}` | no |
 | min\_cpu\_platform | Specifies a minimum CPU platform. Applicable values are the friendly names of CPU platforms, such as Intel Haswell or Intel Skylake. See the complete list: https://cloud.google.com/compute/docs/instances/specify-min-cpu-platform | `string` | `null` | no |
 | name\_prefix | Name prefix for the instance template | `string` | `"default-instance-template"` | no |

modules/instance_template/main.tf

@@ -63,6 +63,7 @@ locals {
 # Instance Template
 ####################
 resource "google_compute_instance_template" "tpl" {
+  provider                = google-beta
   name_prefix             = "${var.name_prefix}-"
   project                 = var.project_id
   machine_type            = var.machine_type
@@ -175,11 +176,12 @@ resource "google_compute_instance_template" "tpl" {
   }
 
   scheduling {
-    preemptible                 = local.preemptible
     automatic_restart           = local.automatic_restart
+    instance_termination_action = var.spot ? var.spot_instance_termination_action : null
+    maintenance_interval        = var.maintenance_interval
     on_host_maintenance         = local.on_host_maintenance
+    preemptible                 = local.preemptible
     provisioning_model          = var.spot ? "SPOT" : null
-    instance_termination_action = var.spot ? var.spot_instance_termination_action : null
   }
 
   advanced_machine_features {

modules/instance_template/metadata.yaml

@@ -194,6 +194,10 @@ spec:
         description: Machine type to create, e.g. n1-standard-1
         varType: string
         defaultValue: n1-standard-1
+      - name: maintenance_interval
+        description: Specifies the frequency of planned maintenance events
+        varType: string
+        defaultValue: null
       - name: metadata
         description: Metadata, provided as a map
         varType: map(string)

modules/instance_template/variables.tf

@@ -74,6 +74,16 @@ variable "automatic_restart" {
   default     = true
 }
 
+variable "maintenance_interval" {
+  type        = string
+  description = "Specifies the frequency of planned maintenance events"
+  default     = null
+  validation {
+    condition     = var.maintenance_interval == null || var.maintenance_interval == "PERIODIC"
+    error_message = "var.maintenance_interval must be set to null or \"PERIODIC\""
+  }
+}
+
 variable "on_host_maintenance" {
   type        = string
   description = "Instance availability Policy"

modules/instance_template/versions.tf

@@ -17,8 +17,8 @@
 terraform {
   required_version = ">=0.13.0"
   required_providers {
-    google = {
-      source  = "hashicorp/google"
+    google-beta = {
+      source  = "hashicorp/google-beta"
       version = ">= 4.67, < 5.0"
     }
   }