https://www.2cto.com/net/201803/730799.html
意思是说：此linux的内核中的SELinux不支持 overlay2 graph driver ，解决方法有两个，要么启动一个新内核，要么就在docker里禁用selinux，--selinux-enabled=false
重新编辑docker配置文件：
vi /etc/sysconfig/docker
改为：
然后systemctl start docker 就好啦哈哈哈哈
Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a newer kernel or disable selinux in docker (--selinux-enabled=false)
[root@localhost run]# 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: exit-code) since Mon 2018-05-07 10:49:31 CST; 20s ago
Docs: http://docs.docker.com
Process: 54217 ExecStart=/usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --exec-opt native.cgroupdriver=systemd --userland-proxy-path=/usr/libexec/docker/docker-proxy-current --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=1/FAILURE)
Main PID: 54217 (code=exited, status=1/FAILURE)
May 07 10:49:29 localhost.localdomain systemd[1]: Starting Docker Application Conta....
May 07 10:49:30 localhost.localdomain dockerd-current[54217]: time="2018-05-07T10:49...
May 07 10:49:30 localhost.localdomain dockerd-current[54217]: time="2018-05-07T10:49...
May 07 10:49:31 localhost.localdomain dockerd-current[54217]: Error starting daemon:...
May 07 10:49:31 localhost.localdomain systemd[1]: docker.service: main process exit...E
May 07 10:49:31 localhost.localdomain systemd[1]: Failed to start Docker Applicatio....
May 07 10:49:31 localhost.localdomain systemd[1]: Unit docker.service entered faile....
May 07 10:49:31 localhost.localdomain systemd[1]: docker.service failed.
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost run]# systemctl status docker.service -l
● docker.service - Docker Application Container Engine
Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2018-05-07 10:49:31 CST; 1min 22s ago
Docs: http://docs.docker.com
Process: 54217 ExecStart=/usr/bin/dockerd-current --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current --default-runtime=docker-runc --exec-opt native.cgroupdriver=systemd --userland-proxy-path=/usr/libexec/docker/docker-proxy-current --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_OPTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=1/FAILURE)
Main PID: 54217 (code=exited, status=1/FAILURE)
May 07 10:49:29 localhost.localdomain systemd[1]: Starting Docker Application Container Engine...
May 07 10:49:30 localhost.localdomain dockerd-current[54217]: time="2018-05-07T10:49:30.102683786+08:00" level=warning msg="could not change group /var/run/docker.sock to docker: group docker not found"
May 07 10:49:30 localhost.localdomain dockerd-current[54217]: time="2018-05-07T10:49:30.159748297+08:00" level=info msg="libcontainerd: new containerd process, pid: 54225"
May 07 10:49:31 localhost.localdomain dockerd-current[54217]: Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a newer kernel or disable selinux in docker (--selinux-enabled=false)
May 07 10:49:31 localhost.localdomain systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE
May 07 10:49:31 localhost.localdomain systemd[1]: Failed to start Docker Application Container Engine.
May 07 10:49:31 localhost.localdomain systemd[1]: Unit docker.service entered failed state.
May 07 10:49:31 localhost.localdomain systemd[1]: docker.service failed.
[root@localhost run]# vi /etc/sysconfig/dock
[root@localhost run]# vi /etc/sysconfig/docker
[root@localhost run]# systemctl start docker
[root@localhost run]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
