环境：

主keepalived服务器：192.168.80.100从keepalived服务器: 192.168.80.101

Web服务器:192.168.80.102

192.168.80.103

windows7 :192.168.80.20

主从keepalived服务器上：

modprobe ip_vs

yum install ipvsadm -y

yum -y install gcc gcc-c++ make popt-devel kernel-devel openssl-devel

tar xf keepalived-1.4.2.tar.gz -C /opt

cd keepalived-1.4.2/

./configure --prefix=/

make && make install

cp keepalived/etc/init.d/keepalived /etc/init.d/ //加入系统管理服务

systemctl enable keepalived

在主服务器上

vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_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 1TCP_CHECK { connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 3}}}

service keepalived start

ip addr show dev ens32

ipvsadm –Ln //查看LVS虚拟服务器

cat /var/log/messages

配置从keepalived服务器：

vi /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs { router_id LVS_02}vrrp_instance VI_1 { state BACKUPinterface ens32virtual_router_id 51priority 105advert_int 1authentication { auth_type PASSauth_pass 6666}virtual_ipaddress { 192.168.80.188}}virtual_server 192.168.80.188 80 { delay_loop 6lb_algo rrlb_kind DRpersistence_timeout 60protocol TCPreal_server 192.168.80.102 80 { weight 1TCP_CHECK { connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 3}}real_server 192.168.80.103 80 { weight 1TCP_CHECK { connect_port 80connect_timeout 3nb_get_retry 3delay_before_retry 3}}}

service keepalived start

ipvsadm –Ln

验证热备结果

配置web节点服务器

第一台web节点：yum install -y httpdvi /etc/httpd/conf/httpd.conf

cd /var/www/html/

echo "<h1>SERVER AA</h1>" > index.htmlservice httpd start

vi web.sh

#!/bin/bash#hahaifconfig lo:0 192.168.80.188 broadcast 192.168.80.188 netmask 255.255.255.255 uproute add -host 192.168.80.188 dev lo:0echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/lo/arp_announceecho "1" >/proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/all/arp_announcesysctl -p &>/dev/null

sh web.sh

ifconfig

第二台web节点：

yum install -y httpdvi /etc/httpd/conf/httpd.conf

cd /var/www/html/

echo "<h1>SERVER BB</h1>" > index.htmlservice httpd start

vi web.sh

#!/bin/bash#hahaifconfig lo:0 192.168.80.188 broadcast 192.168.80.188 netmask 255.255.255.255 uproute add -host 192.168.80.188 dev lo:0echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/lo/arp_announceecho "1" >/proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/all/arp_announcesysctl -p &>/dev/null

sh web.sh

ifconfig

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

   Win7访问http://192.168.80.188

2. 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

LVS+Keepalived已成功搭建并测试完成