Lvs Dr 模式配置

1、Dr 安装 ipvsadm

# yum -y install ipvsadm

# lsmod | grep ip_vs    #检查ipvs模块是否加载进系统。把ipvs模块加载进系统，需要我们执行ipvsadm命令才会加载进去，或者modprobe ip_vs。

# modprobe ip_vs      #加载ipvs模块

# lsmod | grep ip_vs

ip_vs                 125220  0

# echo 1 > /proc/sys/net/ipv4/ip_forward  #开启路由转发

2、Dr 配置VIP地址

# ifconfig  eth0:0  VIP/24

# route add -host  VIP  dev  eth0

3、配置LVS、添加Real server节点

# ipvsadm -C            #清空原有配置

# ipvsadm -A -t VIP:80 -s rr -p 20        #指定VIP

# ipvsadm -a -t VIP:80 -r RS1:80 -g -w 1   #rs1节点

# ipvsadm -a -t VIP:80 -r RS2:80 -g -w 1   #rs2节点

# ipvsadm -L -n                      #查看lvs 配置

 

脚本

# vim /usr/local/sbin/ipvs

#!/bin/bash

PORT=80

VIP=192.168.119.150

RIP=(192.168.119.134

192.168.119.135

)

start(){

ifconfig eth0:0 $VIP/24 up

route add -host $VIP dev eth0

ipvsadm -C

ipvsadm -A -t $VIP:$PORT -s rr -p 20for ((i=0;i<${#RIP[*]};i++))do

ipvsadm -a -t $VIP:$PORT -r ${RIP[$i]}:$PORT -g -w 1

done

}

stop(){

ipvsadm -C

ifconfig eth0:0 down

route del -host $VIP dev eth0

}case "$1" in

start)

start

echo "ipvs is start"

;;

stop)

stop

echo "ipvs is stop"

;;

restart)

stop

echo "ipvs is stop"

start

echo "ipvs is start"

;;

*)

echo "usage:$0 {start|stop|restart}"

esac

 

4、Rs 配置

添加lo端口的VIP

# ifconfig lo:0  192.168.119.150/32 up

# route add -host 192.168.119.150 dev lo

ARP抑制

# 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_announce

# echo "2">/proc/sys/net/ipv4/conf/all/arp_announce

脚本

#!/bin/bash

VIP=192.168.119.150

PORT=80

case "$1" in

start)

ifconfig eth0:0 $VIP/32 up

route add -host $VIP dev eth0

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_announce

echo "2">/proc/sys/net/ipv4/conf/all/arp_announce

echo "start LVS of REALServer IP"

;;

stop)

ifconfig eth0:0 $VIP/32 down

route del -host $VIP dev eth0

echo "0">/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "0">/proc/sys/net/ipv4/conf/lo/arp_announce

echo "0">/proc/sys/net/ipv4/conf/all/arp_announce

echo "0">/proc/sys/net/ipv4/conf/all/arp_announce

echo "stop LVS OF REALServer"

;;*)

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

esac