LVS+DR模式

这个脚本是LVS的DR模式  当用户访问192.168.1.22的时候 实际访问的web地址是192.168.1.243和192.168.1.251.

 

Vip 地址 192.168.1.22

客户端一   192.168.1.243

客户端二   192.168.1.251

 

安装软件： yum -y install ipvsadm

将以下代码复制新建脚本 lvs     在将 lvs 复制到 /etc/init.d/ 下 chmod 777 lvs

启动 lvs 脚本   /etc/init.d/lvs start

启动 ipvsadm  /etc/init.d/ipvsadm start

                                                 两个客户端操作相同

完成之后 192.168.1.22 来访问两个客户端的80 端口页面即可

 

#!/bin/bash

#

# LVS script for VS/DR

#

. /etc/rc.d/init.d/functions

#

VIP=192.168.1.22

RIP1=192.168.1.243

RIP2=192.168.1.251

PORT=80

#

case "$1" in

start)         

  /sbin/ifconfig eth0:1 $VIP broadcast $VIP netmask 255.255.255.255 up

  /sbin/route add -host $VIP dev eth0:1

# Since this is the Director we must be able to forward packets

  echo 1 > /proc/sys/net/ipv4/ip_forward

# Clear all iptables rules.

  /sbin/iptables -F

# Reset iptables counters.

  /sbin/iptables -Z

# Clear all ipvsadm rules/services.

  /sbin/ipvsadm -C

# Add an IP virtual service for VIP 192.168.0.219 port 80

# In this recipe, we will use the round-robin scheduling method.

# In production, however, you should use a weighted, dynamic scheduling method.

  /sbin/ipvsadm -A -t $VIP:80 -s wlc

# Now direct packets for this VIP to

# the real server IP (RIP) inside the cluster

 /sbin/ipvsadm -a -t $VIP:80 -r $RIP1 -g -w 1## 有几个 RIP 地址这里就需要几行

  /sbin/ipvsadm -a -t $VIP:80 -r $RIP2 -g -w 1    ##-w 1 为平衡刷新页面

  /bin/touch /var/lock/subsys/ipvsadm &> /dev/null

;;

stop)

# Stop forwarding packets

  echo 0 > /proc/sys/net/ipv4/ip_forward

# Reset ipvsadm

  /sbin/ipvsadm -C

# Bring down the VIP interface

  /sbin/ifconfig eth0:1 down

  /sbin/route del $VIP

  /bin/rm -f /var/lock/subsys/ipvsadm

  echo "ipvs stopped..."

;;

status)

  if [ ! -e /var/lock/subsys/ipvsadm ]; then

    echo "ipvsadm stopped ..."

  else

    echo "ipvs is running ..."

    ipvsadm -L -n

  fi

;;

*)

  echo "Usage: $0 {start|stop|status}"

;;

esac