安装所需的包:

yum install -y yum-utils device-mapper-persistent-data lvm2

安装docker的repo:

sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

安装docker ce:

yum install docker-ce

启动docker:

systemctl start docker

验证docker:

docker run hello-world

配置docker国内镜像:
编辑/etc/docker/daemon.json，添加以下一行

{
  "registry-mirrors": ["https://registry.docker-cn.com"]
}

重新启动docker:

systemctl restart docker

如要安装指定的旧版本则需要使用rpm安装，比如安装17.03.2.ce版本

yum remove -y docker-ce container-selinux
rm -rf /var/lib/docker
curl -O https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-17.03.2.ce-1.el7.centos.x86_64.rpm
curl -O https://mirrors.aliyun.com/docker-ce/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm
rpm -Uvh docker-ce*17.03.2.ce*.rpm