卸载命令：

    1. yum remove docker \
    2.                   docker-client \
    3.                   docker-client-latest \
    4.                   docker-common \
    5.                   docker-latest \
    6.                   docker-latest-logrotate \
    7.                   docker-logrotate \
    8.                   docker-selinux \
    9.                   docker-engine-selinux \
    10.                   docker-engine

    删除配置文件

    rm -rf /etc/systemd/system/docker.service.d

rm -rf /var/lib/docker

rm -rf /var/run/docker