step 1: 添加软件源信息
dnf config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
Step 2
sudo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
Step 3: 更新并安装Docker-CE
dnf update
dnf -y install docker-ce
Step 4: 开启Docker服务
systemctl start docker
Step 5:开机启动docker
systemctl enable docker
