1、啓動docker
systemctl restart docker.service
報錯後用以下命令查看docker狀態
root@X555LB:~# systemctl status docker.service
● docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; disabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2019-04-28 18:52:57 CST; 3min 28s ago
Docs: https://docs.docker.com
Process: 28689 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=1/FAILURE)
Main PID: 28689 (code=exited, status=1/FAILURE)
4月 28 18:52:57 X555LB systemd[1]: docker.service: Service hold-off time over, scheduling restart.
4月 28 18:52:57 X555LB systemd[1]: docker.service: Scheduled restart job, restart counter is at 3.
4月 28 18:52:57 X555LB systemd[1]: Stopped Docker Application Container Engine.
4月 28 18:52:57 X555LB systemd[1]: docker.service: Start request repeated too quickly.
4月 28 18:52:57 X555LB systemd[1]: docker.service: Failed with result ‘exit-code’.
4月 28 18:52:57 X555LB systemd[1]: Failed to start Docker Application Container Engine.
2、運行dockerd命令
root@X555LB:~# dockerd
報錯，大概意思是docker支持的有效存儲驅動有devicemapper, overlay2，可能docker默認的存儲驅動不是這兩個，更改爲有效的存儲驅動即可。
Error starting daemon: error initializing graphdriver: /var/lib/docker contains several valid graphdrivers: devicemapper, overlay2; Please cleanup or explicitly choose storage driver (-s )
3、更改存儲驅動
gedit /etc/docker/daemon.json
{
"registry-mirrors": ["https://2elq31uu.mirror.aliyuncs.com"],
"storage-driver": "devicemapper"
}
4、重啓docker即可
systemctl restart docker.service