//telnet 测试负载均衡和故障转移
测试负载均衡
1.master 和 backup上启动keepalived
/etc/init.d/keepalived start
2.150主机上telnet VIP
shell> telnet 10.10.54.151 80
Trying 10.10.54.151...
Connected to 10.10.54.151.
Escape character is '^]'.
3.master主机上查看IPVS信息
shell> ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.10.54.151:80 rr
-> 10.10.54.157:80 Route 1 1 0
-> 10.10.54.159:80 Route 1 0 1
##由上面查看157机子上"ActiveConn"变为1
##重新执行 telnet 10.10.54.151 80 操作后，发现159机子"ActiveConn"变为1
##上面测试结果显示，LVS负载均衡已经成功
测试故障转移是否成功
1.当掉master主机155
shell> /etc/init.d/keepalived stop
Stopping keepalived: [ OK ]
2.backup主机上查看ip信息
shell> ip add list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 08:00:27:1f:da:47 brd ff:ff:ff:ff:ff:ff
inet 10.10.54.156/24 brd 10.10.54.255 scope global eth0
inet 10.10.54.151/24 scope global secondary eth0:1
inet6 fe80::a00:27ff:fe1f:da47/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
link/ether 08:00:27:ac:b4:36 brd ff:ff:ff:ff:ff:ff
3.测试backup是否可以负载
shell> telnet 10.10.54.151 80
shell> ipvsadm -ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP 10.10.54.151:80 rr
-> 10.10.54.157:80 Route 1 1 0
-> 10.10.54.159:80 Route 1 0 0
##由上面可知，LVS故障转移成功
更多CentOS相关信息见CentOS 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=14
