1、启动docker时报错

[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.
 

2、根据提示输入：[root@localhost ~]# systemctl status docker.service

如下图，SELinux is not supported with the overlay2 graph driver on this kernel.

SELinux不支持此内核上的overlay2图形驱动程序，禁用selinux即可

3、[root@localhost ~]# vim /etc/sysconfig/docker

修改信息如下图：

4、重启docker即可。