安装docker步骤

# 安装Docker所需要的依赖包
yum install -y yum-utils device-mapper-persistent-data lvm2
# 添加Docker yum源
yum-config-manager --add-repo
https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

# 安装docker-ce
yum install docker-ce-20.10.* docker-ce-cli-20.10.* -y 

# 启动docker
systemctl daemon-reload && systemctl enable --now docker