A detailed analysis of the CentOS of LVs Dr

About LVs DR (Direct Root) mode

DR mode requires Director and realserver on the same network segment, the user through the VIP to access our services, Director received the user's request, will be the request of the target Mac to one of the realserver above, So realserver receive the request processing directly after the content returned to the user, no longer walk directorserver.

Machine Preparation

directserver:192.168.1.200
realserver1:192.168.1.202
realserver2:192.168.1.203
vip:192.168.1.200

Two realserver above all configured static IP, set up a LNMP, how to configure static IP and structure and the focus of this article does not have much relationship, for the moment press not table.

Installation LVs

The code is as follows	Copy Code
wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz TAR-ZXVF ipvsadm-1.24.tar.gz CD ipvsadm-1.24 Ln-s/usr/src/kernels/2.6.32-431.11.2.el6.x86_64//usr/src/linux #一定一定要加这么个软链, otherwise the Linux kernel will not be able to find the error when compiling Make

Make install
After the installation is complete, knock the command Ipvsadm

Description of the installation was successful and properly
Configure Director
Create a file/etc/init.d/lvsdr and give execution permissions:

The code is as follows

Copy Code

#!/bin/sh &NBSP vip=192.168.1.201 rip1=192.168.1.203 rip2=192.168.1.202 ./etc/rc.d/init.d/functions Case "$" in Start)   echo "Start lvs  of Directorserver"   # Set the virtual  IP address    ifconfig eth3:0 $VIP/24    #/sbin/route add-host $VIP Dev eth3:0    #Clear Ipvs Table   /sbin/ipvsadm-c   #set LVS  /sbin/ipvsadm-a-T $VIP: 80-s RR # (if session is required to stay Tim Plus-P defaults to remain 300 seconds)  /sbin/ipvsadm-a-T $VIP: 80-r $RIP 1:80-g  /sbin/ipvsadm-a-T $VIP: 80-r $RIP 2:80-g< br>   #/sbin/ipvsadm-a-T $VIP: 80-r $RIP 3:80–g   #Run LVS  /sbin/ipvsadm   #end ;; Stop)  echo "Close LVS directorserver" /sbin/ipvsadm-c ;; *) Echo "Usage: $ {start|stop}" Exit 1 Esac

Execution:/ETC/INIT.D/LVSDR start

And then ifconfig look at the eth3. Two ip:192.168.1.200 and 192.168.1.201 have been tied up.

Configure Realserver
Create new file/etc/init.d/realserver and give execution permissions

The code is as follows

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#!/bin/sh vip=192.168.1.201 . /etc/rc.d/init.d/functions Case "$" in Start echo "Start LVS of Realserver" Echo 2 >/proc/sys/net/ipv4/conf/all/arp_announce Echo 2 >/proc/sys/net/ipv4/conf/eth2/arp_announce Echo 1 >/proc/sys/net/ipv4/conf/all/arp_ignore Echo 1 >/proc/sys/net/ipv4/conf/eth2/arp_ignore Service Network restart Ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP Route add-host $VIP Dev lo:0 #end ;; Stop echo "Close LVS realserver" Service Network restart ;; *) echo "Usage: $ {start|stop}" Exit 1 Esac /etc/init.d/realserver

Start, ifconfig look at Lo's network card has been the virtual IP to tie up!

Test

Place different content on each realserver, then access via VIP: http://192.168.1.201