centos7安装docker
1.更新yum源
yum update
2.选择镜像地址
yum-config-manager --add-repo http://download.docker.com/linux/centos/docker-ce.repo(中央仓库)
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo(阿里仓库)
3.查看版本并选择自己需要的版本
(1) yum list docker-ce --showduplicates | sort –r
(2) yum –y install docker-ce-18.03.1.ce
(3) systemctl status docker
(4) systemctl enable docker
(5) docker version