LVS + keepalived + httpd High Availability cluster

Experimental Information and topology:
Note: Centos 6.5 selinux–disabled iptables off

ServerName	Ipaddress Information
Lvsmaster	172.16.100.10/24
Lvsbackup	172.16.100.11/24
Vip	172.16100.200/24
RealServer1	172.16.100.100/24
RealServer2	172.16.100.101/24

1. Configuring LVs Master & LVs Backup

# yum Install popt popt-devel popt-static libnl-devel libnl–y

# mkdir-p Mkdir/usr/local/src/lvs

# cd/usr/local/src/lvs/

Installing Ipvsadm

# wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.26.tar.gz

# tar ZXVF ipvsadm-1.26.tar.gz

# make && make install && echo "Install LVS OK"

Installing keepalived

# wget http://www.keepalived.org/software/keepalived-1.2.13.tar.gz

# tar ZXVF keepalived-1.2.13.tar.gz

# CD keepalived-1.2.13

#./configure && make && make install && echo "installkeepalived OK" | | echo "Install keepalived is failed"

Configure keepalived as the startup script:

# cp/usr/local/etc/rc.d/init.d/keepalived/etc/init.d/

# cp/usr/local/etc/sysconfig/keepalived/etc/sysconfig/

# mkdir/etc/keepalived

# cp/usr/local/etc/keepalived/keepalived.conf/etc/keepalived/

# cp/usr/local/sbin/keepalived/usr/sbin/

LVS Backup Configuration Ibid.

Master keepalived.conf configuration file:

! Configuration File for Keepalived

global_defs{

Notification_email {

[Email protected]

}

Notification_email_from [email protected]

Smtp_server 127.0.0.1

router_id Lvs_devel

}

vrrp_instancevi_1 {

State MASTER

Interface eth0

VIRTUAL_ROUTER_ID 51

Priority 100

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1q2w3e4r5t6y

}

virtual_ipaddress {

172.16.100.200

}

}

VIRTUAL_SERVER172.16.100.200 80 {

Delay_loop 6

Lb_algo WRR

Lb_kind DR

Persistence_timeout 60

Protocol TCP

Real_server 172.16.100.100 80 {

Weight 3

Tcp_check {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

Real_server 172.16.100.101 80 {

Weight 3

Tcp_check {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

}

Lvs Backup configuration file:

! Configuration File for Keepalived

global_defs{

Notification_email {

[Email protected]

}

Notification_email_from [email protected]

Smtp_server 127.0.0.1

router_id Lvs_devel

}

vrrp_instancevi_1 {

State BACKUP

Interface eth0

VIRTUAL_ROUTER_ID 51

Priority 99

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1q2w3e4r5t6y

}

virtual_ipaddress {

172.16.100.200

}

}

VIRTUAL_SERVER172.16.100.200 80 {

Delay_loop 6

Lb_algo WRR

Lb_kind DR

Persistence_timeout 60

Protocol TCP

Real_server 172.16.100.100 80 {

Weight 3

Tcp_check {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

Real_server 172.16.100.101 80 {

Weight 3

Tcp_check {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

}

The two realserver configuration scripts are as follows:

#!/bin/bash

#

# Script to start LVS DR real server.

# Description:lvs DR Real Server

#

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

vip=172.16.100.200

Host= '/bin/hostname '

Case "$" in

Start

# Start LVS-DR Real Server on the this machine.

/sbin/ifconfig Lo Down

/sbin/ifconfig lo Up

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

/sbin/ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up

/sbin/route add-host $VIP Dev lo:0

;;

Stop

# Stop LVS-DR Real Server loopback device (s).

/sbin/ifconfig lo:0 Down

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_ignore

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

;;

Status

# Status of Lvs-dr Real server.

Islothere= '/sbin/ifconfig lo:0 | grep $VIP '

Isrothere= ' Netstat-rn | grep "lo:0" | grep $VIP '

if [! "$islothere"-O! " Isrothere "];then

# either the route or the lo:0 device

# not found.

echo "LVS-DR Real server Stopped."

Else

echo "LVS-DR Real server Running."

Fi

;;

*)

# Invalid entry.

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

Exit 1

;;

Esac

# sh realserver.sh start

1. Access verification:

   1. Arbitrarily shut down a Web server, the service can be accessed normally
   2. Arbitrarily close one LVS, the service can be accessed normally

This article is from the "Sword Slave" blog, be sure to keep this source http://diudiu.blog.51cto.com/6371183/1568003

LVS + keepalived + httpd high Availability cluster (RPM)