title: Google Cloud Pub/Sub Trigger on Google Images
body: <p>We need a way to automatically create a Pub/Sub trigger on new compute images (preferably triggered on a specific image family). Alternatively, we know that Pub/Sub on GCS buckets, but we have not found a way to automate transferring images to a GCS bucket. </p>
  
  <p>For some background: we are automating image baking through packer and we need this piece to trigger a terraform creation. We know that a cron job can be created to simply poll images when they are created, but we are wondering if there is already support for such a trigger in GCP.</p>