mosaicwang/keepalived

keepalived镜像说明

镜像概述

本镜像基于Alpine 3.20.3官方镜像重新构建，升级keepalived至2.2.8版本，简化了原镜像的基础结构（去除baseimage依赖），通过多阶段构建减小体积，同时使用阿里云镜像源加速构建过程。

核心功能

1. 支持VRRP协议实现服务器高可用
2. 集成JSON、SNMP、日志文件等功能选项
3. 多阶段构建优化镜像体积（约51.6MB）
4. 提供灵活的配置挂载及启动参数支持

使用场景

• 服务器集群的故障转移与高可用保障
• 负载均衡器的主备切换
• 需要高可靠性的网络服务场景

配置说明

1. 构建所需文件

• Dockerfile-multistage：多阶段构建配置文件
• keepalived-2.2.8.tar.gz：keepalived源码包
• entrypoint.sh：镜像启动脚本
• config/keepalived.conf：keepalived配置文件

2. 构建镜像

bash
docker buildx build -t keepalived:2.2.8 -f Dockerfile-multistage .

3. 启动镜像

目录结构准备

/storage/keepalived
├── config/keepalived.conf  # 配置文件
├── logs/                   # 日志目录
└── start-keepalived.sh     # 启动脚本

启动脚本示例（start-keepalived.sh）

bash
docker rm -f keepalived
docker run -d \
--cap-add=NET_ADMIN \
--net=host \
--restart always \
--name keepalived \
-v /storage/keepalived/config/keepalived.conf:/etc/keepalived/keepalived.conf \
-v /storage/keepalived/logs:/logs \
-v /etc/localtime:/etc/localtime \
docker.xuanyuan.run/keepalived:2.2.8 --vrrp --use-file=/etc/keepalived/keepalived.conf \
--log-file=/logs/keepalived.log --log-console --log-detail --dont-fork

配置文件示例（config/keepalived.conf）

! Configuration File for keepalived
global_defs {
   router_id LVS_DEVEL
   max_auto_priority 5
}
vrrp_instance VI_1 {
    state MASTER
    interface ens160
    virtual_router_id 51
    priority 150
    advert_int 1
    virtual_ipaddress {
        192.168.186.100
    }
}

4. 验证版本

bash
docker run --rm docker.xuanyuan.run/keepalived:2.2.8 --version

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