[root@localhost ~]# systemctl status docker.service

● docker.service - Docker Application Container Engine

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

   Active: failed (Result: exit-code) since Mon 2019-01-28 04:00:18 PST; 2min 41s ago

     Docs: http://docs.docker.com

  Process: 60006 ExecStart=/usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-currentuserland-proxy-path=/usr/libexec/docker/docker-proxy-current --init-path=/usr/libexec/docker/docker-init-current --se$DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=1/FAILURE)

 Main PID: 60006 (code=exited, status=1/FAILURE)

Jan 28 04:00:17 localhost.localdomain systemd[1]: Starting Docker Application Container Engine...

Jan 28 04:00:17 localhost.localdomain dockerd-current[60006]: time="2019-01-28T04:00:17.749182186-08:00" level=warnin

Jan 28 04:00:17 localhost.localdomain dockerd-current[60006]: time="2019-01-28T04:00:17.751260562-08:00" level=info m

Jan 28 04:00:18 localhost.localdomain dockerd-current[60006]: time="2019-01-28T04:00:18.767364925-08:00" level=warnin

Jan 28 04:00:18 localhost.localdomain dockerd-current[60006]: Error starting daemon: SELinux is not supported with th

Jan 28 04:00:18 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE

Jan 28 04:00:18 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.

Jan 28 04:00:18 localhost.localdomain systemd[1]: Unit docker.service entered failed state.

Jan 28 04:00:18 localhost.localdomain systemd[1]: docker.service failed.

Hint: Some lines were ellipsized, use -l to show in full.

解决：删除/var/lib/docker/下面所有内容，重启docker。

重启后/var/lib/docker/里面的数据会重新生成。

rm -rf /var/lib/docker/*

systemctl start docker