CentOS7上Docker 启动失败

版本信息：centos7、docker19.03.2（使用阿里镜像源下载的）

在使用sudo systemctl start docker命令启动docker时失败。

[vagrant@localhost ~]$ sudo systemctl start docker
Job for docker.service failed because the control process exited with error code. See "systemctl status docker.service" and "journalctl -xe" for details.

日志信息：

[vagrant@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: start-limit) since Mon 2021-07-05 12:22:19 UTC; 4s ago
     Docs: https://docs.docker.com
  Process: 1191 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=1/FAILURE)
 Main PID: 1191 (code=exited, status=1/FAILURE)

Jul 05 12:22:17 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
Jul 05 12:22:17 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
Jul 05 12:22:17 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
Jul 05 12:22:17 localhost.localdomain systemd[1]: docker.service failed.
Jul 05 12:22:19 localhost.localdomain systemd[1]: docker.service holdoff time over, scheduling restart.
Jul 05 12:22:19 localhost.localdomain systemd[1]: Stopped Docker Application Container Engine.
Jul 05 12:22:19 localhost.localdomain systemd[1]: start request repeated too quickly for docker.service
Jul 05 12:22:19 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
Jul 05 12:22:19 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
Jul 05 12:22:19 localhost.localdomain systemd[1]: docker.service failed.

解决方法： 在docker.service文件中加入阿里的镜像源。

1. cd /usr/lib/systemd/system
2. sudo vi docker.service
3. 修改ExecStart后的值

搞定~