LVS-DR直接路由实现负载均衡示例

要求：通过使用LVS的直接路由来实现服务器的负载均衡

注：在做实验之前一定要先关闭每台主机的防火墙与SELinux

拓扑图

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LVS服务器配置:

1> 开启转发功能

[root@localhost ~]# echo 1 > /proc/sys/net/ipv4/ip_forward

2> 安装lvs控制软件ipvsadm

[root@localhost ~]# mount /dev/cdrom /mnt/cdrom

mount: block device /dev/cdrom is write-protected, mounting read-only

[root@localhost ~]# cd /mnt/cdrom/Cluster

[root@localhost Cluster]# rpm -ivh ipvsadm-1.24-10.i386.rpm

warning: ipvsadm-1.24-10.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

Preparing...            ###################################### [100%]

1:ipvsadm              ###################################### [100%]

3> 创建规则

[root@localhost Cluster]# ipvsadm -A -t 192.168.2.11:80 -s rr

[root@localhost Cluster]# ipvsadm -a -t 192.168.2.11:80 -r 192.168.2.20 -g

[root@localhost Cluster]# ipvsadm -a -t 192.168.2.11:80 -r 192.168.2.30 -g

4> 保存规则并启动服务

[root@localhost Cluster]# service ipvsadm save

Saving IPVS table to /etc/sysconfig/ipvsadm:              [  OK  ]

[root@localhost Cluster]# service ipvsadm start

Clearing the current IPVS table:                          [  OK  ]

Applying IPVS configuration:                              [  OK  ]

Http server 1 配置

1>    安装http服务器软件

[root@localhost ~]# mount /dev/cdrom /mnt/cdrom

mount: block device /dev/cdrom is write-protected, mounting read-only

[root@localhost ~]# cd /mnt/cdrom/Server/

[root@localhost Server]# rpm -ivh httpd-2.2.3-31.el5.i386.rpm

warning: httpd-2.2.3-31.el5.i386.rpm: Header V3 DSA signature: NOKEY, key ID 37017186

Preparing...              ################################## [100%]

1:httpd                  #################################### [100%]

[root@localhost Server]#

2>    开启服务

[root@localhost Server]# service httpd start

Starting httpd:                                            [  OK  ]

3>    为http服务创建一个主页

[root@localhost Server]# echo "111111" > /var/www/html/index.html

4>    开启arp过滤

先查看arp支持的状态

[root@localhost Server]# sysctl -a | grep arp

dev.parport.parport0.devices.lp.timeslice = 200

dev.parport.parport0.devices.active = none

dev.parport.parport0.modes = PCSPP,TRISTATE

dev.parport.parport0.dma = -1

dev.parport.parport0.irq = 7

dev.parport.parport0.base-addr = 888                                                      0

dev.parport.parport0.spintime = 500

dev.parport.default.spintime = 500

dev.parport.default.timeslice = 200

net.ipv4.conf.eth1.arp_accept = 0

net.ipv4.conf.eth1.arp_ignore = 0

net.ipv4.conf.eth1.arp_announce = 0

net.ipv4.conf.eth1.arp_filter = 0

net.ipv4.conf.eth1.proxy_arp = 0

net.ipv4.conf.eth0.arp_accept = 0

net.ipv4.conf.eth0.arp_ignore = 0

net.ipv4.conf.eth0.arp_announce = 0

net.ipv4.conf.eth0.arp_filter = 0

net.ipv4.conf.eth0.proxy_arp = 0

net.ipv4.conf.lo.arp_accept = 0

net.ipv4.conf.lo.arp_ignore = 0

net.ipv4.conf.lo.arp_announce = 0

net.ipv4.conf.lo.arp_filter = 0

net.ipv4.conf.lo.proxy_arp = 0

net.ipv4.conf.default.arp_accept = 0

net.ipv4.conf.default.arp_ignore = 0

net.ipv4.conf.default.arp_announce = 0

net.ipv4.conf.default.arp_filter = 0

net.ipv4.conf.default.proxy_arp = 0

net.ipv4.conf.all.arp_accept = 0

net.ipv4.conf.all.arp_ignore = 0

net.ipv4.conf.all.arp_announce = 0

net.ipv4.conf.all.arp_filter = 0

net.ipv4.conf.all.proxy_arp = 0

对其进行过滤

[root@localhost ~]# echo "net.ipv4.conf.all.arp_ignore = 2" >> /etc/sysctl.conf

[root@localhost ~]# echo "net.ipv4.conf.eth0.arp_announce = 1" >> /etc/sysctl.conf

5>    添加到主机192.168.2.11的路由

[root@localhost ~]# route add -host 192.168.2.11 dev lo:0