大流量WEB架构-LVS集群配置

一.环境
lvs-dr
eth0    192.168.1.50
eth0:1    192.168.1.55(VIP)
web1
eth0    192.168.1.51
lo:0    192.168.1.55(VIP)
web2
eth0    192.168.1.52
lo:0    192.168.1.55(VIP)

注:所有真实IP必须在同一网段,VIP可以用其他网段

二.lvs-dr配置
1)检查内核是否支持ipvs
modprobe -l | grep “ipvs”

2)安装ipvsadm
apt-get install ipvsadm

3)启用ip转发
vi /etc/sysctl.conf
net.ipv4.ip_forward = 1

4)配置脚本
vi bin/lvs-dr.sh
#!/bin/bash
#description:start lvs_server
#set lvs
/sbin/ipvsadm -C
/sbin/ipvsadm -A -t 192.168.1.55:80 -s rr
/sbin/ipvsadm -a -t 192.168.1.55:80 -r 192.168.1.51:80 -g -w 1
/sbin/ipvsadm -a -t 192.168.1.55:80 -r 192.168.1.52:80 -g -w 1
/etc/init.d/ipvsadm save

三.WEB配置
1)配置脚本
vi bin/lvs-web.sh
#!/bin/bash
#Description : RealServer Start!
#Write by:hugwww
#Last Modefiy:2009.1.24
VIP=192.168.1.55
/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
/sbin/route add -host $VIP dev lo:0
echo “1″ >/proc/sys/net/ipv4/conf/lo/arp_ignore
echo “2″ >/proc/sys/net/ipv4/conf/lo/arp_announce
echo “1″ >/proc/sys/net/ipv4/conf/all/arp_ignore
echo “2″ >/proc/sys/net/ipv4/conf/all/arp_announce
sysctl -p
#end

IPVS已实现了以下十种调度算法:
* 轮叫调度(Round-Robin Scheduling)
* 加权轮叫调度(Weighted Round-Robin Scheduling)
* 最小连接调度(Least-Connection Scheduling)
* 加权最小连接调度(Weighted Least-Connection Scheduling)
* 基于局部性的最少链接(Locality-Based Least Connections Scheduling)
* 带复制的基于局部性最少链接(Locality-Based Least Connections with Replication Scheduling)
* 目标地址散列调度(Destination Hashing Scheduling)
* 源地址散列调度(Source Hashing Scheduling)
* 最短预期延时调度(Shortest Expected Delay Scheduling)
* 不排队调度(Never Queue Scheduling)

注:WEB服务器可以是windows 2003,windows 2008,win7,linux,freeBSD,UNIX等

完成!

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