背景：
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CentOS6.2下搭建LVS(DR)+Keepalived实现高性能高可用负载均衡服务器
[日期：2012-03-24] 来源：Linux社区 作者：crazylinux [字体：]
6、在2台RealServer中分别配置HTTP并启动realserver.sh
[root@host3 ~]# yum -y install httpd
[root@host3 ~]# cd /var/www/html/
[root@host3 html]# cat index.html
<h1>RealServer 192.168.10.3</h1>
[root@host3 html]# /etc/init.d/httpd start
[root@host3 ~]# /etc/init.d/realserver.sh start
另一台机器配置一样，过程略、、、
7、测试：
分别启动Keepalived
[root@host1 ~]# chkconfig keepalived on
[root@host1 ~]# /etc/init.d/keepalived restart
[root@host1 ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 192.168.10.100:http rr persistent 50
-> 192.168.10.3:http Route 1 0 0
-> 192.168.10.4:http Route 1 0 0
先关闭LVS_Master的Keepalived，观察LVS_Backup的日志
[root@host2 ~]# tailf /var/log/messages
Mar 21 07:22:28 host2 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
Mar 21 07:22:29 host2 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
Mar 21 07:22:29 host2 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
Mar 21 07:22:29 host2 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.10.100 added
Mar 21 07:22:29 host2 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.10.100
在测试机上访问：
启动LVS_Master，在查看LVS_Backup日志
[root@host2 ~]# tailf /var/log/messages
Mar 21 07:26:20 host2 Keepalived_vrrp: VRRP_Instance(VI_1) Received higher prio advert
Mar 21 07:26:20 host2 Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
Mar 21 07:26:20 host2 Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs.
Mar 21 07:26:20 host2 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.10.100 removed
一切访问正常~！祝各位好运！~
CentOS6.2下搭建LVS(NAT)+Keepalived实现高性能高可用负载均衡服务器
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