centos7 systemctl start docker 失败 start-limit 解决方案

[root@localhost ~]# 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.
[root@localhost ~]# systemctl status docker.service
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
   Active: failed (Result: start-limit) since Sat 2019-05-18 07:59:04 PDT; 17s ago
     Docs: https://docs.docker.com
  Process: 4174 ExecStart=/usr/bin/dockerd (code=exited, status=1/FAILURE)
 Main PID: 4174 (code=exited, status=1/FAILURE)

原因和解决方案

原因：

参考一些说法是自己 配置了国内镜像，比如阿里云的docker镜像
比如我用了：yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

解决方法：

如果是配置了国内镜像，并且镜像文件为/etc/docker/daemon.json，则修改文件后缀为.conf即可正常启动docker 服务

[root@localhost tmp]# cd /etc/docker/
[root@localhost docker]# ll
total 4
-rw-r--r--. 1 root root   0 May 16 08:58 daemon.json
-rw-------. 1 root root 244 May 12 01:36 key.json
[root@localhost docker]# mv daemon.json deamon.conf

然后启动docker就ok了

[root@localhost ~]# systemctl start docker
[root@localhost ~]# docker version
Client:
 Version:           18.06.3-ce
 API version:       1.38
 Go version:        go1.10.3
 Git commit:        d7080c1
 Built:             Wed Feb 20 02:26:51 2019
 OS/Arch:           linux/amd64
 Experimental:      false

Server:
 Engine:
  Version:          18.06.3-ce
  API version:      1.38 (minimum version 1.12)
  Go version:       go1.10.3
  Git commit:       d7080c1
  Built:            Wed Feb 20 02:28:17 2019
  OS/Arch:          linux/amd64
  Experimental:     false