- `service_account_id` (string) - Service account identifier to assign to instance. - `source_image_folder_id` (string) - The ID of the folder containing the source image. - `source_image_id` (string) - The source image ID to use to create the new image from. - `source_image_name` (string) - The source image name to use to create the new image from. Name will be looked up in `source_image_folder_id`. - `target_image_folder_id` (string) - The ID of the folder to save built image in. This defaults to value of 'folder_id'.