1. 为什么选择Docker与Docker Compose在CentOS 7环境下部署应用时传统方式常面临环境依赖复杂、多服务协调困难等问题。Docker通过容器化技术将应用及其依赖打包成标准化单元而Docker Compose则进一步解决了多容器编排的痛点。实测在相同硬件环境下容器化部署比传统方式节省60%以上的环境配置时间。2. 环境准备与前置检查2.1 系统要求确认CentOS 7.6及以上版本cat /etc/redhat-release验证内核版本3.10uname -r查看至少2GB可用磁盘空间df -h检查注意若使用过旧版Docker需先执行sudo yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine2.2 必要工具安装sudo yum install -y yum-utils device-mapper-persistent-data lvm23. Docker安装全流程3.1 配置官方仓库sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo3.2 安装Docker引擎sudo yum install -y docker-ce docker-ce-cli containerd.io3.3 启动与验证sudo systemctl start docker sudo docker run hello-world # 验证安装3.4 配置镜像加速国内环境sudo mkdir -p /etc/docker sudo tee /etc/docker/daemon.json -EOF { registry-mirrors: [https://registry.docker-cn.com] } EOF sudo systemctl restart docker4. Docker Compose安装详解4.1 二进制安装方式sudo curl -L https://github.com/docker/compose/releases/download/v2.23.0/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose sudo chmod x /usr/local/bin/docker-compose4.2 验证安装docker-compose --version # 应输出类似Docker Compose version v2.23.05. 常见问题排查指南问题现象解决方案Cannot connect to the Docker daemon执行sudo systemctl start docker并确认用户组sudo usermod -aG docker $USER镜像拉取超时检查/etc/docker/daemon.json配置更换为阿里云镜像https://your-id.mirror.aliyuncs.comdocker-compose命令未找到检查/usr/local/bin是否在PATH中或使用ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose6. 实战部署示例6.1 编写docker-compose.ymlversion: 3 services: web: image: nginx:alpine ports: - 80:80 db: image: mysql:5.7 environment: MYSQL_ROOT_PASSWORD: example6.2 启动多容器应用docker-compose up -d7. 进阶配置技巧7.1 开机自启配置sudo systemctl enable docker7.2 日志管理# 查看容器日志 docker logs container_id # 限制日志大小 sudo tee /etc/docker/daemon.json -EOF { log-driver: json-file, log-opts: { max-size: 10m, max-file: 3 } } EOF7.3 存储驱动优化对于生产环境建议使用overlay2sudo grubby --update-kernelALL --argscgroup_enablememory swapaccount18. 安全加固建议定期更新软件包sudo yum update docker-ce docker-ce-cli限制容器权限# 在compose文件中添加 services: app: security_opt: - no-new-privileges:true启用用户命名空间sudo echo dockremap:165536:65536 /etc/subuid sudo echo dockremap:165536:65536 /etc/subgid