title: How to update a Deployment via editing yml file
body: <p>The official <a href="https://kubernetes.io/docs/concepts/workloads/controllers/deployment/#updating-a-deployment" rel="noreferrer">kubernetes guidelines</a>, instructs on updating the deployment either by performing a command line <code>set</code>:</p>
  <pre><code>kubectl set image deployment/nginx-deployment nginx=nginx:1.9.1
  </code></pre>
  <p>or by inline editing (that will launch the default editor I guess)</p>
  <pre><code>kubectl edit deployment/nginx-deployment
  </code></pre>
  <p>However both processes make consistency more difficult given that one needs to go and udpate offline the <code>my-deployment.yml</code> file, where the up &amp; running deployment came from. (and this deprives one from the advantage of keeping their manifests version-controlled).</p>
  <p>Is there a way to</p>
  <ul>
  <li>launch a deployment via the file</li>
  <li>perform (when needed) updates to the <strong>same</strong> file</li>
  <li>update the deployment by pointing to the same, updated file?</li>
  </ul>