docker安装

1.卸载旧版本
yum remove docker \ docker-client \ docker-client-latest \ docker-common \ docker-latest \ docker-latest-logrotate \ docker-logrotate \ docker-engine
2.需要的安装包
yum install -y yum-utils
3.设置镜像的仓库
yum-config-manager \ --add-repo \ [http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo](http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo)
4.更新yum软件包索引
yum makecache fast
5.安装
yum install docker-ce docker-ce-cli containerd.io
6.查看docker版本
docker version

7.启动
systemctl start docker

8.试运行docker
docker run hello-world