1月 05 16:45:39 tomcat8 systemd[1]: Starting Docker Application Container Engine...
1月 05 16:45:39 tomcat8 dockerd-current[34843]: time="2019-01-05T16:45:39.623363594+08:00" level=warning msg="could not change group /var/run/docker.sock ...ot found"
1月 05 16:45:39 tomcat8 dockerd-current[34843]: time="2019-01-05T16:45:39.644220095+08:00" level=info msg="libcontainerd: new containerd process, pid: 34848"
1月 05 16:45:42 tomcat8 dockerd-current[34843]: Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot...ed=false)
1月 05 16:45:42 tomcat8 systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
1月 05 16:45:42 tomcat8 systemd[1]: Failed to start Docker Application Container Engine.
1月 05 16:45:42 tomcat8 systemd[1]: Unit docker.service entered failed state.
1月 05 16:45:42 tomcat8 systemd[1]: docker.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
原因：
linux的内核中的SELinux不支持 overlay2 graph driver
解决办法：
修改配置文件
vi /etc/sysconfig/docker
原文内容：
Modify these options if you want to change the way the docker daemon runs
OPTIONS=‘--selinux-enabled --log-driver=journald --signature-verification=false‘
修改后内容
Modify these options if you want to change the way the docker daemon runs
OPTIONS=‘--selinux-enabled=false --log-driver=journald --signature-verification=false‘重启测试正常
[root@tomcat8 ~]# service docker start
Redirecting to /bin/systemctl start docker.service
[root@tomcat8 ~]#
[root@tomcat8 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
[root@tomcat8 ~]# Error starting daemon: SELinux is not supported
原文：http://blog.51cto.com/zhongliang/2339214