1.卸载之前docker环境

        sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

安装依赖环境

        sudo yum install -y yum-utils

配置镜像地址为  阿里的镜像

        yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装docker CE

        sudo yum install -y docker-ce docker-ce-cli containerd.io

docker启动

        sudo systemctl start docker

验证docker是否启动

        docker ps

出现此画面docker启动成功

设置docker 开机自启动

       sudo systemctl enable docker

ok