在线下载docker安装包和依赖

• mkdir -p /tmp/docker-offline
• cd /tmp/docker-offline
• mv /etc/yum.repos.d/redhat.repo /etc/yum.repos.d/redhat.repo.bak 2>/dev/null
• mv /etc/yum.repos.d/*.repo /tmp/ 2>/dev/null
• 添加阿里云 CentOS 7 Docker 源（针对 CentOS 7，RHEL 7 兼容）

cat > /etc/yum.repos.d/docker-ce.repo << 'EOF'
[docker-ce-stable]
name=Docker CE Stable - $basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/7/$basearch/stable
enabled=1
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg
EOF

• yum clean all
• yum makecache
• yum install -y yum-utils
• 下载 Docker
  yumdownloader --resolve --destdir=/tmp/docker-offline docker-ce docker-ce-cli containerd.io docker-compose-plugin
• cd /tmp && tar -czf docker-offline-packages.tar.gz docker-offline/

离线安装dcoker

1. 解压

cd /tmp && tar -xzf docker-offline-packages.tar.gz

2. 安装（自动处理依赖）

cd docker-offline && yum localinstall -y *.rpm

3. 启动并设置开机自启

systemctl start docker && systemctl enable docker

4. 验证

docker --version