CentOS7启动docker失败：SELinux is not supported with the overlay2 graph driver on this kernel.

1、启动失败

启动doker失败，通过status命令查看docker服务状态，提示下面错误

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

2、解决办法

更新kernel

[root@master ~]# yum update kernel

重启系统后，再次启动docker，正常运行了

[root@master ~]# systemctl start docker
[root@master ~]# systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: active (running) since Mon 2018-03-12 22:57:19 EDT; 10s ago
     Docs: http://docs.docker.com
 Main PID: 11227 (dockerd-current)
   CGroup: /system.slice/docker.service
           ├─11227 /usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --exec-...
           └─11234 /usr/bin/docker-containerd-current -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --metrics-interval=0 --start-t...

Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.175624518-04:00" level=info msg="Loading containers: start."
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.247312871-04:00" level=info msg="Firewalld running: false"
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.340140179-04:00" level=info msg="Default bridge (docker0) is assig...address"
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.402341956-04:00" level=info msg="Loading containers: done."
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.422896974-04:00" level=warning msg="failed to retrieve docker-runc...2-dev\n"
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.422980082-04:00" level=warning msg="failed to retrieve docker-init version"
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.423153023-04:00" level=info msg="Daemon has completed initialization"
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.423169492-04:00" level=info msg="Docker daemon" commit="774336d/1....n=1.13.1
Mar 12 22:57:19 master systemd[1]: Started Docker Application Container Engine.
Mar 12 22:57:19 master dockerd-current[11227]: time="2018-03-12T22:57:19.432072653-04:00" level=info msg="API listen on /var/run/docker.sock"
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[root@master ~]#