linux LVS DR模式配置

拓扑图：

测试环境：CentOS 6.5 X86 64位

配置步骤：

1、  安装测试环境

[root@UCS-1 ~]# yum -y install httpd

[root@UCS-1 ~]# chkconfig --add httpd

[root@UCS-1 ~]# chkconfig --level 35 httpd on

[root@UCS-1 ~]# cd /var/www/html/

[root@UCS-1 html]# touch index.html

[root@UCS-1 html]# vi index.html

<h1>服务器IP地址:192.168.5.11</h1>

[root@UCS-1 html]# chown -R apache:apache index.html

[root@UCS-1 html]# /etc/init.d/httpd start

[root@UCS-2 ~]# yum -y install httpd

[root@UCS-2 ~]# chkconfig --add httpd

[root@UCS-2 ~]# chkconfig --level 35 httpd on

[root@UCS-2 ~]# vi /etc/httpd/conf/httpd.conf

[root@UCS-2 ~]# cd /var/www/html/

[root@UCS-2 html]# touch index.html

[root@UCS-2 html]# vi index.html

<h1>服务器IP地址:192.168.5.12</h1>

[root@UCS-2 html]# chown -R apache:apache index.html

[root@UCS-2 html]# /etc/init.d/httpd start

2、  安装LVS软件

[root@UCS-3 data]# wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz  

[root@UCS-3 data]# tar zxvf ipvsadm-1.24.tar.gz

[root@UCS-3 data]# cd ipvsadm-1.24

[root@UCS-3 ipvsadm-1.24]# ln -s /usr/src/kernels/2.6.32-431.el6.x86_64/ /usr/src/linux

[root@UCS-3 ipvsadm-1.24]# make all

[root@UCS-3 ipvsadm-1.24]# make install

[root@UCS-3 ipvsadm-1.24]# ipvsadm --version

ipvsadm v1.24 2005/12/10 (compiled with getopt_long and IPVS v1.2.1)

[root@UCS-3 ipvsadm-1.24]#

3、  配置网卡

[root@UCS-3 data]# cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0

[root@UCS-3 data]# vi /etc/sysconfig/network-scripts/ifcfg-eth0:0

DEVICE=eth0:0

TYPE=Ethernet

ONBOOT=yes

NM_CONTROLLED=yes

BOOTPROTO=static

IPADDR=192.168.5.10

NETMASK=255.255.255.255

打开网卡转发功能

[root@UCS-3 data]# vi /etc/sysctl.conf

net.ipv4.ip_forward =1

[root@UCS-3 data]# sysctl –p

[root@UCS-3 data]# route add -host 192.168.5.10 dev eth0:0

[root@UCS-1 ~]# cp /etc/sysconfig/network-scripts/ifcfg-lo /etc/sysconfig/network-scripts/ifcfg-lo:0

[root@UCS-1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-lo:0

DEVICE=lo:0

IPADDR=192.168.5.10

NETMASK=255.255.255.255

ONBOOT=yes

关闭ARP广播响应

#!/bin/bash
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

[root@UCS-2 ~]# cp /etc/sysconfig/network-scripts/ifcfg-lo /etc/sysconfig/network-scripts/ifcfg-lo:0

[root@UCS-2 ~]# vi /etc/sysconfig/network-scripts/ifcfg-lo:0

DEVICE=lo:0

IPADDR=192.168.5.10

NETMASK=255.255.255.255

ONBOOT=yes

~ 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                                                                                                                                            

~[root@UCS-2 ~]# sysctl –p

[root@UCS-2 ~]# /etc/init.d/network restart

[root@UCS-2 ~]# route add -host 192.168.5.10 dev lo:0

[root@UCS-3 ~]# ipvsadm –C

[root@UCS-3 ~]# ipvsadm -At 192.168.5.10:80 -s rr

[root@UCS-3 ~]# ipvsadm -at 192.168.5.10:80 -r 192.168.5.11:80 -g

[root@UCS-3 ~]# ipvsadm -at 192.168.5.10:80 -r 192.168.5.12:80 –g

[root@UCS-3 ~]# ipvsadm -L -n

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.5.10:80 rr

  -> 192.168.5.12:80              Route   1      0          3        

  -> 192.168.5.11:80              Route   1      0          2        

[root@UCS-3 ~]#

[root@UCS-3 ~]# ipvsadm -L -c

IPVS connection entries

pro expire state       source             virtual            destination

TCP 01:29  FIN_WAIT    192.168.101.190:51228 192.168.5.10:http  192.168.5.11:http

TCP 01:35  FIN_WAIT    192.168.101.190:51231 192.168.5.10:http  192.168.5.12:http

TCP 01:29  FIN_WAIT    192.168.101.190:51227 192.168.5.10:http  192.168.5.12:http

4、  测试如下