centos 5.5 64位 Lvs+keepalived-1.1.19配置

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centos 5.5 64位 Lvs+keepalived-1.1.19配置实验环境：
四台服务器，一台做主调度器，一台做备用的调度器，两台做web服务器
1、主调度器的ip：192.168.160.201 网关:192.168.160.1
2、备用调度器的ip:192.168.160.199 网关：192.168.160.1
3、vip的ip：192.168.160.200
4、两台web服务器的ip分别为:192.168.160.202和203，网关:192.168.160.1
5、分别配置两台web服务器以下内容：
vi /etc/ sysctl.conf 增加如下内容：
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
[iyunv@websrv1 ~]# ip addr add 192.168.160.200/32 dev lo:0 ——配置vip的地址，否则无法把数据传送到客户端
[iyunv@websrv1 ~]# ip addr list—-检查配置是否正确
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet 192.168.160.200/32 brd 192.168.160.200 scope global lo:0
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:50:56:a3:11:d3 brd ff:ff:ff:ff:ff:ff
inet 192.168.160.202/24 brd 192.168.160.255 scope global eth0
inet6 fe80::250:56ff:fea3:11d3/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
这样配置完以后，重启机器或者网络信息会丢失，如查永久保存这个信息的话，可以在写一个脚本放到/etc/rc.local的文件中，让它随机启动。我们也可以这样，
[iyunv@websrv1 network-scripts]# vi ifcfg-lo:0
DEVICE=lo:0
IPADDR=192.168.160.200
NETMASK=255.255.255.255
# If you’re having problems with gated making 127.0.0.0/8 a martian,
# you can change this to something else (255.255.255.255, for example)
ONBOOT=yes
然后，保存退出，重起机器后，确认是否工作正常
6、在websrv2也做同样的操作
7、配置主调度器
首先安装ipvsadm软件，这个软件可以到官方网站下载，我下载的版本是ipvsadm-1.24.tar.gz
tar zxvf ipvsadm-1.24.tar.gz
cd ipvsadm-1.24
ln -s /usr/src/kernels/2.6.18-194.el5-x86_64 /usr/src/linux
make
make install
然后再安装keepalived-1.1.19.tar.gz
tar zxvf keepalived-1.1.19.tar.gz
cd keepalived-1.1.19
./configure –prefix=/usr/local/keepalived
make
make install
添加vip地址在网卡中
[iyunv@lvssrv1 ~]# ip addr add 192.168.160.200/32 dev eth1:0
[iyunv@lvssrv1 ~]#ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
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: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:50:56:a3:25:90 brd ff:ff:ff:ff:ff:ff
inet 192.168.160.201/24 brd 192.168.160.255 scope global eth1
inet 192.168.160.200/32 scope global eth1
inet6 fe80::250:56ff:fea3:2590/64 scope link
valid_lft forever preferred_lft forever
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
新建一个脚本文件ipvs.sh，内容如下：
ipvsadm -C
ipvsadm -A -t 192.168.160.200:80 -s wlc
ipvsadm -a -t 192.168.160.200:80 -r 192.168.160.202:80 -g
ipvsadm -a -t 192.168.160.200:80 -r 192.168.160.203:80 -g
[iyunv@lvssrv1 ~]#chmod u+x ipvs.sh
[iyunv@lvssrv1 ~]#./ipvs.sh
用ipvsadm查看一下，工作是否正常
[iyunv@lvssrv1 ~]# ipvsadm
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCPlocalhost:http wlc persistent 50
-> localhost:http Route 100
-> localhost:http Route 100
[iyunv@lvssrv1 ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP192.168.160.200:80 wlc persistent 50
-> 192.168.160.203:80 Route 100
-> 192.168.160.202:80 Route 100
下面开始配置keepavlied
[iyunv@lvssrv1 ~]# cd /usr/local/keepalived/etc/keepalived/
[iyunv@lvssrv1 ~]#cp keepalived.conf keepalived.conf.bak
[iyunv@lvssrv1 ~]#vi keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_TEST
}
vrrp_instance VI_1 {
state MASTER
interface eth1
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.160.200
}
}
virtual_server 192.168.160.200 80 {
delay_loop 6
lb_algo wlc
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.160.202 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 30
}
}
real_server 192.168.160.203 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 30
}
}
}
保存，就可以了，然后
cp /usr/local/keepalive/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
cp /usr/local/keepalive/etc/sysconfig/keepalived /etc/sysconfig/
mkdir /etc/keepalived
cp /usr/local/keepalive/etc/keepalived/keepalived.conf /etc/keepalived/
cp /usr/local/keepalive/sbin/keepalived /usr/sbin/
这样就可以用
service keepalived start|stop来管理keepalived
可以用service keepalived start来启动keepalived，用ps 去查看一下相关的进程是否存在，tail -f /var/log/messages看一下日志
到此主调度服务器就完成配置了，现在我们要配置备用调度器，备用调度器的配置跟主调度器一样，只不过不用去配置vip地址了，还有keepalived.conf文件有三处需要修改的地方如下：
[iyunv@lvssrv2 keepalived]# more keepalived.conf
! Configuration File for keepalived
global_defs {
router_id LVS_BAK
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 50
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.160.200
}
}
virtual_server 192.168.160.200 80 {
delay_loop 6
lb_algo wlc
lb_kind DR
persistence_timeout 50
protocol TCP
real_server 192.168.160.202 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 30
}
}
real_server 192.168.160.203 80 {
weight 1
TCP_CHECK {
connect_port 80
connect_timeout 30
}
}
}
一个地方的router_id名不同，还有状态不同,一个是master，一个是backup，还有一个是priority不同。其它的不变,还有一点需要说明一下，我主服务器因为是用的eth1网卡，所以相应的配置文件也需要进行变换。
这样环境就搭建完毕，可以进行测试，经过测试，所有的功能都已经实现。