1.安装底层工具
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
2.加入阿里云仓库
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
3.更新仓库源信息
sudo yum makecache fast
4.下载Docker
sudo yum -y install docker-ce
5.启动Docker
sudo service docker start
6.查看Docker是否安装成功
docker version
7.设置开机自启动
systemctl enable docker.service