安装
$ yum install -y yum-utils # 安装依赖包
$ curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo # 添加yum软件源
$ wget -O /etc/yum.repos.d/docker-ce.repo https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo
$ sed -i 's#download.docker.com#mirrors.tuna.ts