title: GCE: create instance template out of disk snapshot
body: <p>Is it possible? Official manual consists this:</p>
  
  <p>Deterministic instance templates</p>
  
  <ul>
  <li>Use <a href="https://cloud.google.com/compute/docs/images" rel="noreferrer">custom images</a> or <a href="https://cloud.google.com/compute/docs/disks#snapshots" rel="noreferrer">disk snapshots</a> rather than startup scripts.</li>
  </ul>
  
  <p>But no more info how can I do this. Maybe someone have already did that? Tnx in advance.</p>