title: start docker error when add --insecure-registry
body: <p>i want create private registry and follow this answer <a href="https://stackoverflow.com/questions/26026931/setting-up-a-remote-private-docker-registry">Setting up a remote private Docker registry</a>
   docker run -p 5000:5000 registry
  and other servre modify  /usr/lib/systemd/system/docker.service file to disable https</p>
  
  <p>ExecStart=/usr/bin/dockerd --insecure-registry 172.24.54.41:5000</p>
  
  <p>i can curl 172.24.54.41:5000
  sudo service docker stop
  sudo systemctl daemon-reload 
  sudo systemctl start docker
  the error log in systemctl status docker.service</p>
  
  <blockquote>
    <p>docker.service - Docker Application Container Engine
       Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
       Active: failed (Result: start-limit) since Mon 2017-12-11 16:52:23 CST; 6min ago
         Docs: <a href="https://docs.docker.com" rel="nofollow noreferrer">https://docs.docker.com</a>
      Process: 13300 ExecStart=/usr/bin/dockerd --insecure-registry 172.24.54.41:5000 (code=exited, status=1/FAILURE)
     Main PID: 13300 (code=exited, status=1/FAILURE)</p>
    
    <p>Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: Failed to start Docker Application Container Engine.
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: Unit docker.service entered failed state.
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: docker.service failed.
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: docker.service holdoff time over, scheduling restart.
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: start request repeated too quickly for docker.service
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: Failed to start Docker Application Container Engine.
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: Unit docker.service entered failed state.
    Dec 11 16:52:23 iZhp39y3a2bx21oz0waijyZ systemd[1]: docker.service failed.</p>
  </blockquote>
  
  <p>how to solve it?</p>