Merge pull request #112 from dennislapchenko/pin_machine_image

Allow pinning vm's machine image, instead of always using latest …stable/cos_cloud

README.md

@@ -221,6 +221,7 @@ You can check the status of the certificate in the Google Cloud Console.
 | <a name="input_iap"></a> [iap](#input\_iap) | Settings for enabling Cloud Identity Aware Proxy to protect the Atlantis UI | <pre>object({<br>    oauth2_client_id     = string<br>    oauth2_client_secret = string<br>  })</pre> | `null` | no |
 | <a name="input_image"></a> [image](#input\_image) | Docker image. This is most often a reference to a container located in a container registry | `string` | `"ghcr.io/runatlantis/atlantis:latest"` | no |
 | <a name="input_labels"></a> [labels](#input\_labels) | Key-value pairs representing labels attaching to instance & instance template | `map(any)` | `{}` | no |
+| <a name="input_machine_image"></a> [machine\_image](#input\_machine\_image) | The machine image to create VMs with, if not specified, latest cos\_cloud/cos\_stable is used | `string` | `null` | no |
 | <a name="input_machine_type"></a> [machine\_type](#input\_machine\_type) | The machine type to run Atlantis on | `string` | `"n2-standard-2"` | no |
 | <a name="input_name"></a> [name](#input\_name) | Custom name that's used during resource creation | `string` | n/a | yes |
 | <a name="input_network"></a> [network](#input\_network) | Name of the network | `string` | n/a | yes |

main.tf

@@ -141,7 +141,7 @@ resource "google_compute_instance_template" "default" {
 
   # Ephemeral OS boot disk
   disk {
-    source_image = data.google_compute_image.cos.self_link
+    source_image = var.machine_image != null ? var.machine_image : data.google_compute_image.cos.self_link
     auto_delete  = true
     boot         = true
     disk_type    = "pd-ssd"

variables.tf

@@ -23,6 +23,12 @@ variable "zone" {
   description = "The zone that instances should be created in"
 }
 
+variable "machine_image" {
+  type        = string
+  description = "The machine image to create VMs with, if not specified, latest cos_cloud/cos_stable is used"
+  default     = null
+}
+
 variable "machine_type" {
   type        = string
   description = "The machine type to run Atlantis on"