執行以下命令報錯

systemctl restart docker

查看錯誤信息

systemctl status docker -l

報錯信息如下：

● docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled) Drop-In: /etc/systemd/system/docker.service.d └─kolla.conf Active: failed (Result: exit-code) since 三 2018-08-01 16:32:27 CST; 52min ago Docs: https://docs.docker.com Process: 3833722 ExecStart=/usr/bin/docker daemon --insecure-registry 172.16.59.153 (code=exited, status=1/FAILURE) Main PID: 3833722 (code=exited, status=1/FAILURE) Memory: 8.0K CGroup: /system.slice/docker.service8月 01 16:32:26 czwei004 systemd[1]: Starting Docker Application Container Engine...8月 01 16:32:26 czwei004 docker[3833722]: time='2018-08-01T16:32:26.527063936+08:00' level=info msg='libcontainerd: new containerd process, pid: 3833733'8月 01 16:32:27 czwei004 docker[3833722]: time='2018-08-01T16:32:27.532317497+08:00' level=warning msg='devmapper: Usage of loopback devices is strongly discouraged for production use. Please use `--storage-opt dm.thinpooldev` or use `man docker` to refer to dm.thinpooldev section.'8月 01 16:32:27 czwei004 docker[3833722]: time='2018-08-01T16:32:27.560010414+08:00' level=warning msg='devmapper: Base device already exists and has filesystem xfs on it. User specified filesystem will be ignored.'8月 01 16:32:27 czwei004 docker[3833722]: time='2018-08-01T16:32:27.577758251+08:00' level=fatal msg='Error starting daemon: error initializing graphdriver: '/var/lib/docker' contains several valid graphdrivers: devicemapper, overlay2; Please cleanup or explicitly choose storage driver (-s <DRIVER>)'8月 01 16:32:27 czwei004 systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE8月 01 16:32:27 czwei004 systemd[1]: Failed to start Docker Application Container Engine.8月 01 16:32:27 czwei004 systemd[1]: Unit docker.service entered failed state.8月 01 16:32:27 czwei004 systemd[1]: docker.service failed.

注意到以上錯誤信息中

msg='Error starting daemon: error initializing graphdriver: '/var/lib/docker' contains several valid graphdrivers: devicemapper, overlay2; Please cleanup or explicitly choose storage driver (-s <DRIVER>)'

到docker目錄下查看，有devicemapper的目錄和overlay2的目錄

原因是我之前裝了高版本的docker-engine，默認的存儲驅動是overlay2，卸載的時候docker目錄下殘留了overlay2的文件夾，后來安裝了低版本的docker，默認的又是devicemapper，于是就有了多個存儲驅動

重啟機器后刪除overlay2的目錄后可以啟動。

補充知識：CentOS7修改Docker鏡像默認存儲位置

停止docker服務

# systemctl stop docker

修改docker服務啟動文件

# vim /etc/sysconfig/dockerOPTIONS=’--selinux-enabled --log-driver=journald --graph=/docker --signature-verification=false --insecure-registry 192.168.1.1’#--insecure-registry 192.168.1.1這是倉庫地址可以忽略# /docker這個目錄就是我用于替代默認/var/lib/docker的目錄，目錄創建好之后記得“mv /var/lib/docker/* /docker/”，把所有原

先目錄下所有的文件和目錄拷貝到新目錄下。

重新加載配置并啟動

# systemctl daemon-reload

# systemctl start docker

檢查docker信息

# docker info

以上這篇docker.service啟動報錯的一次排查詳解就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持好吧啦網。