一、启动服务
1、在每台RS（真实服务器）上绑定LVS的虚拟IP及抑制ERP
- [root@LVS_RS_104 ~]# /etc/rc.d/init.d/lvs_dr.sh start
- RealServer Start OK
- [root@LVS_DR_103 ~]# /etc/rc.d/init.d/lvs_dr.sh start
- RealServer Start OK
2、启动LVS主的Keepalived服务 并查看日志 /var/log/messages
- [root@LVS_Master_101 ~]# /etc/rc.d/init.d/keepalived start
- 正在启动 keepalived： [确定]
- [root@LVS_Master_101 ~]# tail -f /var/log/messages
- Jan 22 04:06:28 centos1 Keepalived_healthcheckers: Using MII-BMSR NIC polling thread...
- Jan 22 04:06:28 centos1 Keepalived_healthcheckers: Netlink reflector reports IP 192.168.1.101 added
- Jan 22 04:06:28 centos1 Keepalived_healthcheckers: Registering Kernel netlink reflector
- Jan 22 04:06:28 centos1 Keepalived_healthcheckers: Registering Kernel netlink command channel
- Jan 22 04:06:29 centos1 Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE
- Jan 22 04:06:30 centos1 Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE
- Jan 22 04:06:30 centos1 Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs.
- Jan 22 04:06:30 centos1 Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.181
- Jan 22 04:06:30 centos1 Keepalived_vrrp: Netlink: skipping nl_cmd msg...
- Jan 22 04:06:30 centos1 avahi-daemon[1261]: Registering new address record for 192.168.1.181 on eth0.IPv4.
3、启动备的Keeplived服务，并查看日志
- [root@LVS_Backup_114 ~]# /etc/rc.d/init.d/keepalived start
- 正在启动 keepalived： [确定]
- [root@LVS_Backup_114 ~]# cat /var/log/messages
- Jan 22 04:17:29 test Keepalived: Starting Keepalived v1.1.17 (01/13,2013)
- Jan 22 04:17:29 test Keepalived: Starting Healthcheck child process, pid=1528
- Jan 22 04:17:29 test Keepalived: Starting VRRP child process, pid=1529
- Jan 22 04:17:29 test Keepalived_vrrp: Using MII-BMSR NIC polling thread...
- Jan 22 04:17:29 test Keepalived_healthcheckers: Using MII-BMSR NIC polling thread...
- Jan 22 04:17:29 test Keepalived_healthcheckers: Netlink reflector reports IP 192.168.1.114 added
- Jan 22 04:17:29 test Keepalived_vrrp: Netlink reflector reports IP 192.168.1.114 added
- Jan 22 04:17:29 test Keepalived_healthcheckers: Registering Kernel netlink reflector
- Jan 22 04:17:29 test Keepalived_healthcheckers: Registering Kernel netlink command channel
- Jan 22 04:17:29 test Keepalived_vrrp: Registering Kernel netlink reflector
- Jan 22 04:17:29 test Keepalived_vrrp: Registering Kernel netlink command channel
- Jan 22 04:17:29 test Keepalived_vrrp: Registering gratutious ARP shared channel
- Jan 22 04:17:29 test Keepalived_vrrp: Opening file '/etc/keepalived/keepalived.conf'. #打开Keepalived的主配置文件
- Jan 22 04:17:29 test Keepalived_vrrp: Configuration is using : 62711 Bytes
- Jan 22 04:17:29 test Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE #进入备 角色
- Jan 22 04:17:29 test Keepalived_vrrp: VRRP sockpool: [ifindex(2), proto(112), fd(10,11)]
4、使用ipvsadm -Ln查看状态
- [root@LVS_Master_101 ~]# ipvsadm
- IP Virtual Server version 1.2.1 (size=4096)
- Prot LocalAddress:Port Scheduler Flags
- -> RemoteAddress:Port Forward Weight ActiveConn InActConn
- TCP 192.168.1.181:http rr persistent 50
- -> 192.168.1.104:http Route 1 0 0
- -> 192.168.1.103:http Route 1 0 0
如果输出和上面的一致表明 LVS + Keepalived安装配置成功。接下来测试负载均衡和高可用。
二、测试负载均衡
1、在192.168.1.103和192.168.1.104上分别执行如下命令（在这里放不同的内容是为了方便测试，在生产环境中内容应该是相同的）：
- 在192.168.1.103上执行下面命令
- [root@LVS_RS_104 ~]# echo "The is server 103" >/var/www/html/index.html
- 在192.168.1.104上执行下面命令
- [root@LVS_DR_103 ~]# echo "The is server 104" >/var/www/html/index.html
2、用两个不同的浏览器访问 http://192.168.1.181
我们看到上面两个浏览器访问到的是不同的RS服务器，负载均衡测试完成。
三、测试高可用：
1、关闭主LVS的Keepalived服务，查看备LVS的日志
[root@LVS_Master_101 ~]# /etc/rc.d/init.d/keepalived stop
停止 keepalived： [确定]
- [root@LVS_Backup_114 ~]# cat /dev/null >/var/log/messages
- [root@LVS_Backup_114 ~]# tail -f /var/log/messages
- Jan 22 04:41:09 test Keepalived_vrrp: VRRP_Instance(VI_1) Transition to MASTER STATE #在没收到主LVS的心跳检测后过度到主
- Jan 22 04:41:10 test Keepalived_vrrp: VRRP_Instance(VI_1) Entering MASTER STATE #进入主的角色
- Jan 22 04:41:10 test Keepalived_vrrp: VRRP_Instance(VI_1) setting protocol VIPs. #设置虚VIP协议
- Jan 22 04:41:10 test Keepalived_healthcheckers: Netlink reflector reports IP 192.168.1.181 added #添加192.168.1.181IP地址
- Jan 22 04:41:10 test avahi-daemon[1180]: Registering new address record for 192.168.1.181 on eth0.IPv4. #将192.168.1.181绑定到eth0上
- Jan 22 04:41:10 test Keepalived_vrrp: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.181 #
- Jan 22 04:41:10 test Keepalived_vrrp: Netlink: skipping nl_cmd msg...
2、启动主LVS的Keepalived服务，查看备节点的日志
[root@LVS_Master_101 ~]# /etc/rc.d/init.d/keepalived start
正在启动 keepalived： [确定]
查看备的日志如下
[root@LVS_Backup_114 ~]# tail -f /var/log/messages
Jan 22 04:47:42 test Keepalived_vrrp: VRRP_Instance(VI_1) Received higher prio advert
Jan 22 04:47:42 test Keepalived_vrrp: VRRP_Instance(VI_1) Entering BACKUP STATE
Jan 22 04:47:42 test Keepalived_vrrp: VRRP_Instance(VI_1) removing protocol VIPs.
Jan 22 04:47:42 test Keepalived_healthcheckers: Netlink reflector reports IP 192.168.1.181 removed
Jan 22 04:47:42 test avahi-daemon[1180]: Withdrawing address record for 192.168.1.181 on eth0.
Jan 22 04:47:42 test Keepalived_vrrp: Netlink: skipping nl_cmd msg...
在主LVS挂掉以后，备LVS会接替主节点的工作，主LVS起来以后，备LVS会把工作交给主节点
本文转自1594cqb 51CTO博客，原文链接：http://blog.51cto.com/wolfchen/1123498，如需转载请自行联系原作者
