1. 准备工作，配置高可用yum源

2. # Main rhel6.5 server[base]name=Instructor Server Repositorybaseurl=http://172.25.254.250/rhel6.5gpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release# LoadBalancer packages[LoadBalancer]name=Instructor LoadBalancer Repositorybaseurl=http://172.25.254.250/rhel6.5/LoadBalancergpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release# ResilientStorage[ResilientStorage]name=Instructor ResilientStorage Repositorybaseurl=http://172.25.254.250/rhel6.5/ResilientStoragegpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release# ScalableFileSystem[ScalableFileSystem]name=Instructor ScalableFileSystem Repositorybaseurl=http://172.25.254.250/rhel6.5/ScalableFileSystemgpgcheck=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release

3. 两台keepalived安装相关组件‍

yum install ipvsadm kernel­-xen­-devel kernel-devel -y

wget http://www.keepalived.org/software/keepalived­1.1.17.tar.gz

tar zxf keepalived­1.1.17.tar.gz

cd keepalived­1.1.17

./configure ­­--prefix=/usr/local/keepalived ­­--with­-kernel­-dir=/kernels/2.6.18­92.。。。 这个目录要安装kernel-devel 哦自己tab

make && make instal

ln ­-s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

ln -s /usr/local/keepalived/sbin/keepalived /usr/sbin/

ln ­-s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

ln ­-s /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

3.vim /etc/keepalived/keepalived.conf

! Configuration File for keepalivedglobal_defs {   notification_email {     root@localhost.com   }   notification_email_from root@localhost.com   smtp_server 127.0.0.1   smtp_connect_timeout 30   router_id LVS_DEVEL}vrrp_instance VI_1 {    state MASTER //备用机写BACKUP    interface eth0    virtual_router_id 51    priority 150 //权值 BACKUP的要比这小    advert_int 1    authentication {        auth_type PASS        auth_pass 1111 }    virtual_ipaddress {        172.25.254.100    }}virtual_server 172.25.254.100 80 {    delay_loop 6    lb_algo rr    lb_kind DR  //采用路由直连    nat_mask 255.255.255.0    protocol TCP    real_server 172.25.254.1 80 {        weight 1        TCP_CHECK{            connect_timeout 3            nb_get_retry 3            delay_before_retry 3     }    real_server 172.25.254.2 80 {        weight 1        TCP_CHECK{            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }}

4.后端realserver上执行脚本

#!/bin/bash# description: Config realserver lo and apply noarp SNS_VIP=172.25.254.100 /etc/rc.d/init.d/functions case "$1" instart)       ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP       /sbin/route add -host $SNS_VIP 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 2>&1       echo "RealServer Start OK"        ;;stop)       ifconfig lo:0 down       route del $SNS_VIP >/dev/null 2>&1       echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore       echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce       echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore       echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce       echo "RealServer Stoped"       ;;*)       echo "Usage: $0 {start|stop}"       exit 1esac exit 0

分别启动realserver的httpd服务整个主页随便hostname什么的测试就可以了

测试方法：在有VIP的主机上 ipvsadm 查看

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConnTCP  172.25.254.100:http rr  -> server1.example.com:http     Route   1      0          0           -> server2.example.com:http     Route   1      0          0 

web访问vip 主页来回切换

关闭server2的httpd服务

web访问VIP 直接转到了server1

关闭一台机子的keepalived服务 vip迁移 另一台机子 ipvsadm 出现数据

就是这样keepalived+lvs负载均衡集群到此搭建完成