1、最小化安装centos
centos版本不能低于centos7
2、在centos中安装docker
（1）最小化安装网卡问题、软件等问题
1）网卡：没有IP地址，要启动网卡。另外还有网卡名称要修改的问题。
2）设置yum源后并清缓存，如阿里源。vim /etc/yum.repos.d/。。。相关文件
base
name=CentOS-7 - Base - mirrors.aliyun.com
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/$basearch/RPM-GPG-KEY-CentOS-7
updates
name=CentOS-7 - Updates - mirrors.aliyun.com
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/updates/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/$basearch/RPM-GPG-KEY-CentOS-7
extras
name=CentOS-7 - Extras - mirrors.aliyun.com
baseurl=https://mirrors.aliyun.com/centos-vault/7.9.2009/extras/$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos-vault/7.9.2009/os/$basearch/RPM-GPG-KEY-CentOS-7
yum clean all
yum makecache
3）更新yum源，yum update
4）安装相关软件yum install -y wget,net-tools等。
5）安装yum工具，yum install -y yum-utils
6）配置Docker的yum源
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
7） 安装必须的软件包
yum install -y yum-utils device-mapper-persistent-date lvm2
8）安装docker
yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
9）相关操作
systemctl stop firewalld
systemctl disable firewalld
systemctl start docker # 启动docker服务 docker images
systemctl start docker # 启动docker服务
systemctl stop docker # 停止docker服务
systemctl restart docker # 重启docker服务
docker -v