卸载之前的安装包
yum remove docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-selinux docker-engine-selinux docker-engine
下载依赖包
yum install -y yum-utils device-mapper-persistent-data lvm2
添加repo源
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
缓存yum cache
yum makecache fast
安装社区版docker
yum -y install docker-ce
systemctl status docker