CentOS 6 EOL

[xSAVIKx]

The CentOS 6 has reached its EOL and is no longer available as a GCE image.

Usually, it should not be an issue, but if for the instance_template module the image_family is set to empty string, terraform considers it as unset and falls back to the centos-6 image family.

Such a fallback makes some pipelines fail with smth like this:

Error: error retrieving image information: googleapi: Error 404: The resource 'projects/centos-cloud/global/images/family/centos-6' was not found, notFound

  on .terraform/modules/sim-preemptible-template.vm_instance_template/modules/instance_template/main.tf line 25, in data "google_compute_image" "image_family":
  25: data "google_compute_image" "image_family" {

[bharathkkb]

@xSAVIKx thanks for the report. We should update the defaults set here. Happy to review a PR

[xSAVIKx]

@bharathkkb please check out the PR #126.

I'd be also super grateful if this change can be released ASAP. We're having multiple production issues that could be fixed easily with this change, but creating a workaround requires too much efforts.