feat: allow set disk size & type on vm runner

Author: davidmontoyago

modules/gh-runner-mig-vm/README.md

@@ -32,6 +32,8 @@ This example shows how to deploy a MIG Self Hosted Runner with an image pre-bake
 | create\_network | When set to true, VPC,router and NAT will be auto created | `bool` | `true` | no |
 | create\_subnetwork | Whether to create subnetwork or use the one provided via subnet\_name | `bool` | `true` | no |
 | custom\_metadata | User provided custom metadata | `map(any)` | `{}` | no |
+| disk\_size\_gb | Instance disk size in GB | `number` | `100` | no |
+| disk\_type | Instance disk type, can be either pd-ssd, local-ssd, or pd-standard | `string` | `"pd-ssd"` | no |
 | gh\_runner\_labels | GitHub runner labels to attach to the runners. Docs: https://docs.github.com/en/actions/hosting-your-own-runners/using-labels-with-self-hosted-runners | `set(string)` | `[]` | no |
 | gh\_token | Github token that is used for generating Self Hosted Runner Token | `string` | n/a | yes |
 | instance\_tags | Additional tags to add to the instances | `list(string)` | `[]` | no |

modules/gh-runner-mig-vm/main.tf

@@ -132,8 +132,8 @@ module "mig_template" {
       "https://www.googleapis.com/auth/cloud-platform",
     ]
   }
-  disk_size_gb                     = 100
-  disk_type                        = "pd-ssd"
+  disk_size_gb                     = var.disk_size_gb
+  disk_type                        = var.disk_type
   auto_delete                      = true
   name_prefix                      = "gh-runner"
   source_image_family              = var.source_image_family

modules/gh-runner-mig-vm/variables.tf

@@ -165,3 +165,15 @@ variable "spot_instance_termination_action" {
   type        = string
   default     = "STOP"
 }
+
+variable "disk_size_gb" {
+  type        = number
+  description = "Instance disk size in GB"
+  default     = 100
+}
+
+variable "disk_type" {
+  type        = string
+  description = "Instance disk type, can be either pd-ssd, local-ssd, or pd-standard"
+  default     = "pd-ssd"
+}