title: docker swarm init could not choose an IP address error
body: <p>Experimenting with <strong>Docker Swarm</strong> with <strong>Docker Desktop for Mac</strong>. I tried this:</p>
  
  <pre><code>docker-machine create -d virtualbox node-1
  docker-machine create -d virtualbox node-2
  docker-machine create -d virtualbox node-3
  
  eval $(docker-machine env node-1)
  
  docker swarm init \
      --secret my-secret \
      --auto-accept worker \
      --listen-addr $(docker-machine ip node-1):2377
  </code></pre>
  
  <p>The last command (<code>docker swarm init</code>) returns this error:</p>
  
  <blockquote>
    <p>Error response from daemon: could not choose an IP address to
    advertise since this system has multiple addresses</p>
  </blockquote>
  
  <p>I have no idea what's going on. Anyone have any idea how to debug?</p>