1.卸载旧版本（如有）
sudo yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine docker-selinux
2. 配置阿里云yum源
# 备份原有配置
sudo mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
# 下载阿里云源配置
sudo curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
# 清理并重建缓存
sudo yum clean all
sudo yum makecache
3. 安装依赖工具
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
4.配置Docker阿里云镜像源
sudo yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
5. 安装Docker引擎
sudo yum install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
6.启动Docker服务并设置开机启动
sudo systemctl start docker
sudo systemctl enable docker
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