haproxy+keeplived高可用负载均衡方案

最新推荐文章于 2025-06-10 19:56:41 发布

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最新推荐文章于 2025-06-10 19:56:41 发布

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分类专栏： Linux服务及故障排除 web服务优化文章标签： keepalived haproxy 高可用负载均衡

本文链接：https://blog.youkuaiyun.com/qq_30256711/article/details/80703664

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本文详细介绍了如何在HAProxy上安装并配置Keepalived，实现高可用性的负载均衡集群。通过具体步骤说明如何搭建主备切换机制，并包含关键配置文件与自定义监控脚本。

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实验环境

haproxy keepalived 主：192.168.154.128
haproxy keepalived 备：192.168.154.133
vip：192.168.154.136
web：192.168.154.130:80 192.168.154.131:80

一.安装haproxy

haproxy的安装请参考https://blog.youkuaiyun.com/qq_30256711/article/details/80702128

二.安装配置keepalived

在主备haproxy上安装haproxy后,安装keeplived

tar -zxvf keepalived-1.1.17.tar.gz
#ln -s /usr/src/kernels/2.6.18-128.el5-i686/ /usr/src/linux
#cd keepalived-1.1.17
#./configure --prefix=/ --mandir=/usr/local/share/man/ --with-kernel-dir=/usr/src/kernels/2.6.18-128.el5-i686/
#make && make install
#cd /etc/keepalived/
#mv keepalived.conf keepalived.conf.default

keepalived配置文件如下

! Configuration File for keepalived
vrrp_script chk_http_port {
script "/etc/keepalived/check_haproxy.sh"
interval 2
weight 2

global_defs {
   notification_email {
    185604832@qq.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_1 #备haproxy上此处为2
}

vrrp_instance VI_1 {
    state MASTER #备haproxy上此处为BACKUP
    interface eth0
    virtual_router_id 51
    priority 150 #备haproxy上此处为100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    track_script {

chk_http_port

   }
    virtual_ipaddress {
        192.168.154.136
    }
}

}

vi /etc/keepalived/check_haproxy.sh #编写keepalived监控haproxy的脚本，如果haproxy停止运行了，就把haproxy启动，如果haproxy启动不了，就关闭keepalived，放弃资源给备用haproxy

#!/bin/bash
A=`ps -C haproxy --no-header|wc -l`
if [ $A -eq 0 ];then
/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg
sleep 3
if [ `ps -C haproxy --no-header|wc -l` -eq 0 ];then
/etc/init.d/keepalived stop
fi
fi

chmod 755 /etc/keepalived/check_haproxy.sh