> 环境：
主keepalived服务器：192.168.80.100
从keepalived服务器: ??192.168.80.101Web服务器:192.168.80.102
192.168.80.103windows操作系统 :192.168.80.20
加载LVS内核模块，并安装
modprobe ip_vs ?????---加载ip_vs模块
yum install ??ipvsadm ?-y ????---安装 ipvsadm
源码安装keepalived:
安装插件和编译软件。yum -y install gcc gcc-c++ make popt-devel kernel-devel openssl-devel
安装上传软件，把软件包从windows系统上传到Centos上去。yum ?install ??lrz* ??-y
把软件包解压到 /opt,编译并安装
tar xf keepalived-1.4.2.tar.gz ?-C ?/opt ?????---解压软件包到/opt cd /opt/keepalived-1.4.2/ ??---切换到解压目录里./configure --prefix=/ ????make && make install ???----编译并且安装cp keepalived/etc/init.d/keepalived /etc/init.d/ ??---加入系统管理服务在主服务器上修改配置文件vi /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs { ??router_id LVS_01 ???????????//本服务器的名称}vrrp_instance VI_1 { ???????????//定义VRRP热备实例 ???state MASTER ????????????//热备状态，MASTER表示主服务器，BACKUP表示从服务器 ???interface ens32 ???????????//承载VIP地址的物理接口 ???virtual_router_id 51 ???????//虚拟路由器的ID号，每个热备组保持一致 ???priority 110 ??????????????//优先级，数值越大优先级越高 ???advert_int 1 ??????????????//通告间隔秒数（心跳频率） ???authentication { ???????????//热备认证信息，每个热备组保持一致 ???????auth_type PASS ???????//认证类型 ???????auth_pass 6666 ???????//密码字符串 ???} ???virtual_ipaddress { ?????????//指定漂移地址（VIP），可以有多个 ???????192.168.80.188 ???}}virtual_server 192.168.80.188 80 { ?????//虚拟服务器地址（VIP）、端口 ???????delay_loop 6 ??????????????//健康检查的间隔时间（秒） ???????lb_algo rr ?????????????????//轮询（rr）调度算法 ???????lb_kind DR ????????????????//直接路由（DR）群集工作模式 ???????persistence_timeout 60 ??????//连接保持时间（秒） ???????protocol TCP ???????????????//应用服务器采用的是TCP协议real_server 192.168.80.102 80 { ????????//第一个Web服务器节点的地址、端口 ???????weight 1 ??????????????????//节点的权重 ???????TCP_CHECK { ???????????????//健康检查方式 ???????connect_port 80 ????????????//检查的目标端口 ???????connect_timeout 3 ??????????//连接超时（秒） ???????nb_get_retry 3 ?????????????//重试次数 ???????delay_before_retry 3 ?????????//重试间隔 ???????}}real_server 192.168.80.103 80 { ??????????//第二个Web服务器节点的地址、端口 ???????weight 1 ???????TCP_CHECK { ????????????connect_port 80 ????????????connect_timeout 3 ????????????nb_get_retry 3 ????????????delay_before_retry 3 ????} ?}}service keepalived start ??---启动 keepalived
ip addr show dev ens32 ????????---查看ens32地址
ipvsadm –Ln ??????//查看LVS虚拟服务器
配置从keepalived服务器：
加载LVS内核模块，并安装
modprobe ip_vs ?????---加载ip_vs模块
yum install ??ipvsadm ?-y ????---安装 ipvsadm
源码安装keepalived:
安装插件和编译软件。yum -y install gcc gcc-c++ make popt-devel kernel-devel openssl-devel
安装上传软件，把软件包从windows系统上传到Centos上去。yum ?install ??lrz* ??-y
把软件包解压到 /opt,编译并安装
tar xf keepalived-1.4.2.tar.gz ?-C ?/opt ?????---解压软件包到/opt cd /opt/keepalived-1.4.2/ ??---切换到解压目录里./configure --prefix=/ ????make && make install ???----编译并且安装cp keepalived/etc/init.d/keepalived /etc/init.d/ ??---加入系统管理服务vi /etc/keepalived/keepalived.conf
! Configuration File for keepalivedglobal_defs { ??router_id LVS_02}vrrp_instance VI_1 { ???state BACKUP ???interface ens32 ???virtual_router_id 51 ???priority 105 ???advert_int 1 ???authentication { ???????auth_type PASS ???????auth_pass 6666 ???} ???virtual_ipaddress { ???????192.168.80.188 ???}}virtual_server 192.168.80.188 80 { ???????delay_loop 6 ???????lb_algo rr ???????lb_kind DR ???????persistence_timeout 60 ???????protocol TCPreal_server 192.168.80.102 80 { ???????weight 1 ???????TCP_CHECK { ???????connect_port 80 ???????connect_timeout 3 ???????nb_get_retry 3 ???????delay_before_retry 3 ???????}}real_server 192.168.80.103 80 { ???????weight 1 ???????TCP_CHECK { ????????????connect_port 80 ????????????connect_timeout 3 ????????????nb_get_retry 3 ????????????delay_before_retry 3 ????} ?}}service keepalived start ?---启动 keepalivedipvsadm –Ln ???---//查看LVS虚拟服务器配置web节点服务器
第一台web节点：yum install -y httpd ???---安装httpd
vi /etc/httpd/conf/httpd.conf ???---修改主配置文件
ServerName www.example.com:80 ?--- 查到此内容，并把前面的注释符合删除
cd /var/www/html/ ??---切换到网页根目录
echo "<h1>SERVER AA</h1>" > index.html ???---把SERVER ?AA写入到index.html，同于创建一个index.html
```service httpd start ??---启动http服务
` vi web.sh ??---创建一个shell脚本，添加以下内容`#!/bin/bash
#haha
ifconfig lo:0 192.168.80.188 broadcast 192.168.80.188 netmask 255.255.255.255 up
route add -host 192.168.80.188 dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p &>/dev/null
`sh web.sh ???---执行脚本``ifconfig ???---查看网卡信息`第二台web服务器: ` yum install -y httpd ???---安装httpd`` ?vi /etc/httpd/conf/httpd.conf ???---修改主配置文件``ServerName www.example.com:80 ?--- 查到此内容，并把前面的注释符合删除`` cd /var/www/html/ ??---切换到网页根目录` ` echo "<h1>SERVER AA</h1>" > index.html ???---把SERVER ?AA写入到index.html，同于创建一个index.html`service httpd start ??---启动http服务
` vi web.sh ??---创建一个shell脚本，添加以下内容`#!/bin/bash
#haha
ifconfig lo:0 192.168.80.188 broadcast 192.168.80.188 netmask 255.255.255.255 up
route add -host 192.168.80.188 dev lo:0
echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce
echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore
echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p &>/dev/null
`sh web.sh ???---执行脚本``ifconfig ???---查看网卡信息`-----测试LVS+Keepalived高可用群集在客户端的浏览器中，能够通过LVS+Keepalived群集的漂移地址（192.168.80.100）正常访问web页面内容，则验证群集构建成功。1. 验证两台Web服务器轮询工作windows ??192.168.80.1882. 模拟主调度器故障，验证结果systemctl stop keepalived //主调度器keepalived停止工作3、模拟Web服务器aa故障`service ?httpd ?stop ???---关闭web服务`-----LVS+Keepalived+httpd已成功搭建并测试完成LVS+keepalived+httpd高可用集群
原文地址：http://blog.51cto.com/13701082/2340851