centos 启动ｄｏｃｋｅｒ服务报错：
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.
1，create daemon.json in /etc/docker/
2，
put this in it:
{
"exec-root": "/path/to/docker/run",
"storage-driver": "overlay",
"graph": "/path/to/docker/lib"
}
不行再执行提示的命令，查看详细信息。
