DOCKER启动失败Job for docker.service failed because the control process exited with error code. See "syste mctl status docker.service" and "journalctl -xe" for details.

[root@localhost ~]# systemctl start docker
Job for docker.service failed because the control process exited with error code. See "syste
mctl status docker.service" and "journalctl -xe" for details.

查看错误信息：

 [root@localhost ~]# docker -v
 Docker version 1.13., build b2f74b2/1.13.

 [root@localhost ~]# systemctl status docker.service -l
 ● docker.service - Docker Application Container Engine
    Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
    Active: failed (Result: exit-code) since Wed -- :: EDT; 14min ago
      Docs: http://docs.docker.com
   Process:  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 --init-path=/usr/libexec/docker/docker-init-current --seccomp-profile=/etc/docker/seccomp.json $OPTIONS $DOCKER_STORAGE_OPTIONS $DOCKER_NETWORK_O
 PTIONS $ADD_REGISTRY $BLOCK_REGISTRY $INSECURE_REGISTRY $REGISTRIES (code=exited, status=/FAILURE)
  Main PID:  (code=exited, status=/FAILURE)

 Jun  :: localhost.localdomain systemd[]: Starting Docker Application Container Engine...
 Jun  :: localhost.localdomain dockerd-current[]: time="2019-06-19T04:25:24.402861259-04:00" level=warning msg="could not change group /var/run/docker.sock to docker: group docker not fo
 und"
 Jun  :: localhost.localdomain dockerd-current[]: time="2019-06-19T04:25:24.418276049-04:00" level=info msg="libcontainerd: new containerd process, pid: 5417"
 Jun  :: localhost.localdomain dockerd-current[]: time="2019-06-19T04:25:25.440697173-04:00" level=warning msg="overlay2: the backing xfs filesystem is formatted without d_type support,
 which leads to incorrect behavior. Reformat the filesystem with ftype= to enable d_type support. Running without d_type support will no longer be supported in Docker 1.16."
 Jun  :: localhost.localdomain dockerd-current[]: Error starting daemon: SELinux is not supported with the overlay2 graph driver on this kernel. Either boot into a newer kernel or disabl
 e selinux in docker (--selinux-enabled=false)
 Jun  :: localhost.localdomain systemd[]: docker.service: main process exited, code=exited, status=/FAILURE
 Jun  :: localhost.localdomain systemd[]: Failed to start Docker Application Container Engine.
 Jun  :: localhost.localdomain systemd[]: Unit docker.service entered failed state.
 Jun  :: localhost.localdomain systemd[]: docker.service failed.

关键信息：SELinux is not supported with the overlay2 graph driver on this kernel.

分析原因：此linux的内核中的SELinux不支持 overlay2 graph driver

　　　　重新编辑docker配置文件： vi /etc/sysconfig/docker

　　　　修改 --selinux-enabled=false

重新启动docker： [root@localhost ~]# systemctl start docker

启动成功！