● docker.service - Docker Application Container Engine

   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)

   Active: failed (Result: exit-code) since 二 2017-11-07 16:58:48 CST; 8s ago

     Docs: http://docs.docker.com

  Process: 2317 ExecStart=/usr/bin/docker-current daemon --exec-opt native.cgroupdriver=systemd $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY 

$BLOCK_REGISTRY $INSECURE_REGISTRY (code=exited, status=1/FAILURE)

 Main PID: 2317 (code=exited, status=1/FAILURE)

11月 07 16:58:47 VM_0_6_centos systemd[1]: Starting Docker Application Container Engine...

11月 07 16:58:48 VM_0_6_centos docker-current[2317]: time="2017-11-07T16:58:48.329486752+08:00" level=fatal msg="Error starting daemon: mkdir /var/lib/docker: file exists"

11月 07 16:58:48 VM_0_6_centos systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE

11月 07 16:58:48 VM_0_6_centos systemd[1]: Failed to start Docker Application Container Engine.

11月 07 16:58:48 VM_0_6_centos systemd[1]: Unit docker.service entered failed state.

11月 07 16:58:48 VM_0_6_centos systemd[1]: docker.service failed.

解决方案：

目前docker肯定是出于未启动状态，所以直接操作

rm -rf /var/lib/docker   

systemctl start  docker  

即可。

      本文转自crazy_charles 51CTO博客，原文链接：http://blog.51cto.com/douya/1979829，如需转载请自行联系原作者