feat: add preemptible option. (#83)

README.md

@@ -88,6 +88,7 @@ If the user does not share the same domain as the org the bastion is in, you wil
 | name | Name of the Bastion instance | `string` | `"bastion-vm"` | no |
 | name\_prefix | Name prefix for instance template | `string` | `"bastion-instance-template"` | no |
 | network | Self link for the network on which the Bastion should live | `string` | n/a | yes |
+| preemptible | Allow the instance to be preempted | `bool` | `false` | no |
 | project | The project ID to deploy to | `string` | n/a | yes |
 | random\_role\_id | Enables role random id generation. | `bool` | `true` | no |
 | scopes | List of scopes to attach to the bastion host | `list(string)` | <pre>[<br>  "cloud-platform"<br>]</pre> | no |

main.tf

@@ -62,6 +62,7 @@ module "instance_template" {
   source_image_family  = var.image_family
   source_image_project = var.image_project
   startup_script       = var.startup_script
+  preemptible          = var.preemptible
 
   tags   = var.tags
   labels = var.labels

variables.tf

@@ -210,6 +210,12 @@ variable "ephemeral_ip" {
   default     = false
 }
 
+variable "preemptible" {
+  type        = bool
+  description = "Allow the instance to be preempted"
+  default     = false
+}
+
 variable "access_config" {
   description = "Access configs for network, nat_ip and DNS"
   type = list(object({