There was a problem :When I started to operate Docker, I reported this error after the installation started Job for docker.service failed because the control process exited with error code. See "systemctl status do cker.service" and "journalctl -xe" for details.
Positioning problem:Enter "systemctl status do cker.service" as prompted, press Enter, and the following prompt appears:
Baidu reason:SELinux in this Linux kernel does not support overlay2 graph driver. There are two solutions, either start a new kernel or disable selinux in docker, –selinux-enabled=false
Solution operation:
1》 vi /etc/sysconfig/docker
2》Add =false after --selinux-enabled; means to disable selinux in docker
3 "The problem has been solved, just start systemctl start docker