Docker Keepalived 项目教程

1. 项目的目录结构及介绍

docker-keepalived/
├── Dockerfile
├── LICENSE
├── README.md
├── assets/
│   ├── config/
│   │   └── keepalived.conf
│   └── service/
│       └── keepalived/
│           └── run
├── docker-compose.yml
└── scripts/
    └── entrypoint.sh

• Dockerfile: 用于构建 Docker 镜像的文件。
• LICENSE: 项目的许可证文件。
• README.md: 项目的说明文档。
• assets/: 包含配置文件和服务的目录。
  • config/: 存放默认的 Keepalived 配置文件。
  • service/: 存放 Keepalived 服务的启动脚本。
• docker-compose.yml: Docker Compose 配置文件，用于定义和运行多容器 Docker 应用程序。
• scripts/: 包含项目的启动脚本。

2. 项目的启动文件介绍

Dockerfile

FROM alpine:3.12

RUN apk add --no-cache keepalived

COPY assets/config/keepalived.conf /etc/keepalived/keepalived.conf
COPY assets/service/keepalived/run /etc/service/keepalived/run

ENTRYPOINT ["/bin/sh", "-c", "/etc/service/keepalived/run"]

• FROM alpine:3.12: 使用 Alpine Linux 作为基础镜像。
• RUN apk add --no-cache keepalived: 安装 Keepalived。
• COPY assets/config/keepalived.conf /etc/keepalived/keepalived.conf: 复制配置文件到镜像中。
• COPY assets/service/keepalived/run /etc/service/keepalived/run: 复制启动脚本到镜像中。
• ENTRYPOINT ["/bin/sh", "-c", "/etc/service/keepalived/run"]: 设置启动脚本为容器启动时的入口点。

docker-compose.yml

version: '3.7'

services:
  keepalived:
    image: osixia/keepalived:latest
    ports:
      - "192.168.1.1:80:80"
    networks:
      - keepalived_network

networks:
  keepalived_network:
    driver: bridge

• version: '3.7': 指定 Docker Compose 文件的版本。
• services: 定义服务。
  • keepalived: 定义 Keepalived 服务。
    • image: osixia/keepalived:latest: 使用最新版本的 Keepalived 镜像。
    • ports: 映射端口。
    • networks: 定义网络。

3. 项目的配置文件介绍

keepalived.conf

global_defs {
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1

    authentication {
        auth_type PASS
        auth_pass 1111
    }

    virtual_ipaddress {
        192.168.200.16
        192.168.200.17
        192.168.200.18
    }
}

• global_defs: 全局定义。
  • router_id: 路由器标识。
• vrrp_instance: VRRP 实例定义。
  • state: 状态（MASTER 或 BACKUP）。
  • interface: 网络接口。
  • virtual_router_id: 虚拟路由器 ID。
  • priority: 优先级。
  • advert_int: 广告间隔。
  • authentication: 认证信息。
  • virtual_ipaddress: 虚拟 IP 地址。

以上是 Docker Keepalived 项目的目录结构、启动文件和配置文件的介绍。希望这份文档能帮助你更好地理解和使用该项目。