在RedHat EL 4.0 中实现高可用WEB负载均衡群集

一、Director配置

1、设置网络接口地址
[root @director root] # vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.0.255
HWADDR=00:0C:29:A2:BD:B5
IPADDR=192.168.0.160
NETMASK=255.255.255.0
NETWORK=192.168.0.0
ONBOOT=yes
2、编辑 lvs 脚本
[root @director root] # vi /etc/init.d/lvsdr
#!/bin/bash
VIP=192.168.0.222
RIP1=192.168.0.249
RIP2=192.168.0.251
/etc/rc.d/init.d/funcions
case "$1" in
start)
echo "start LVS of DirectorServer"
#Set the Virtual ip address
/sbin/ifconfig eth0:0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev eth0:0
# Clear ipvs Table
/sbin/ipvsadm -C
# set lvs
/sbin/ipvsadm -A -t $VIP:80 -s rr
/sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g
/sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g
#Run Lvs
/sbin/ipvsadm
;;
stop)
echo "close LVS Directorsever"
/sbin/ipvsadm -C
/sbin/ifconfig eth0:0 down
;;
*)
echo "Usage: $0 {start|stop}"
exit 1
esac
# 保存并退出，将该文件设置为可执行文件
[root @director root] # chmod 755 /etc/init.d/lvsdr
3、安装 ipvsadm
[root @ Director root] # modprobe –l | grep ipvs
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_ftp.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_lblc.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_wlc.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_sed.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_rr.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_wrr.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_nq.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_sh.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_dh.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_lblcr.ko
/lib/modules/2.6.9-11.EL/kernel/net/ipv4/ipvs/ip_vs_lc.ko
[root @director root] # ln –s /usr/src/kernels/2.6.9-11.EL-i686 /usr/src/linux
[root @ director root] # tar xzvf ipvsadm-1.24.tar.gz
[root @ director ipvsadm-1.24] # cd ipvsadm-1.24
[root @ director ipvsadm-1.24] # make
[root @ director ipvsadm-1.24] # make install
由于在这里我搭建的是 WEB 的负载均衡群集，而我在安装 Redhat EL 4.0 时并没有选择安装 WEB 服务器组件，所以这里需要另外安装，如果已安装的朋友可以略过这里（注：可以用 rpm –qa |grep http 查看是否已经安装）

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