title: Updating docker containers on swarm?
body: <p>How does docker swarm (1.12+) works with container <em>updates</em>? Example:</p>
  
  <p>On one node I have 2 containers, both uses 4GB of memory, total is 8 GB, which is equals to node size.</p>
  
  <p>What if I change memory size of one container to e.g. 6 GB? Will swarm :</p>
  
  <ul>
  <li>reschedule container to new node that has 6 GB free?</li>
  <li>fail to update?</li>
  <li>keeps working both containers as before?</li>
  </ul>
  
  <p>I am failing to figure out by myself.</p>