The Tun model experiment of LVS

Three virtual machines to do LVS load balancing experiment, VM01 is load balancer, only a network card, VM02 and vm03 are real Web servers, their relationship, here and the NAT mode of the difference between the LVS is the server IP address can be in a network segment. This is the legendary Tun tunnel model.

Vm01

eth0:192.168.1.200

vip:192.168.1.30

Vm02

eth1:192.168.1.201

Vm03

eth1:192.168.1.202

First, Load balancer installation

Ipvs is the foundation of the entire load balancing, and without this foundation, fault isolation and failover are meaningless

[Root@vm01 ~]# Yum install-y ipvsadm

[Root@vm01 ~]# lsmod |grep Ip_vs

[Root@vm01 ~]# modprobe Ip_vs

[Root@vm01 ~]# lsmod |grep Ip_vs

Ip_vs 122241 0

It is not up to the process to judge if the Ip_vs module is loaded, because here is a command and no process is generated.

Second, create the LVs Tun mode startup script

[Root@vm01 ~]# Vim/etc/init.d/lvstun

#!/bin/bash

vip=192.168.1.30

rip1=192.168.1.201

rip2=192.168.1.202

Case "$" in

Start

echo "Start LVS of Directorserver Tun"

/sbin/iptables-f

/sbin/ipvsadm-c

/sbin/ifconfig tunl0 $VIP broadcast $VIP netmask 255.255.255.255 up

/sbin/route add-host $VIP Dev tunl0

/sbin/ipvsadm-a-T $VIP: 80-s RR

/sbin/ipvsadm-a-T $VIP: 80-r $RIP 1-i

/sbin/ipvsadm-a-T $VIP: 80-r $RIP 2-i

/sbin/ipvsadm

;;

Stop

echo "Stop LVS of Directorserver Tun"

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

/sbin/ipvsadm-c

/sbin/ifconfig tunl0 Down

;;

*)

echo "Error"

Exit 1

Esac

[ROOT@VM01 ~] #chmod A+x/etc/init.d/lvstun

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