Heartbeat+ipvsadm+ldirectord高可用双机lvs

LVS简介可以参考：http://blog.csdn.net/harbor1981/article/details/1358925

架构图：





所需软件：

ipvsadm-1.24-10.x86_64.rpm

heartbeat-2.1.3-3.el5.centos.x86_64.rpm

heartbeat-pils-2.1.3-3.el5.centos.x86_64.rpm

heartbeat-stonith-2.1.3-3.el5.centos.x86_64.rpm

PyXML-0.8.4-4.x86_64.rpm

系统环境：CentOS 5.9-64bit

192.168.137.14 虚拟ip

192.168.137.134 lvsmaster lvs主

192.168.137.135 lvsbackup lvs从

192.168.137.130 realserver1 web服务器

192.168.137.131 realserver2 web服务器

1、lvs安装

yum -y install ipvsadm

yum -y install libnet

yum -y install e2fsprogs

yum -y install heartbeat

yum -y install heartbeat-devel

yum -y install heartbeat-ldirectord

echo "192.168.137.135 lvsmaster">>/etc/hosts

echo "192.168.137.135 lvsbackup">>/etc/hosts

2、配置步骤主

lvs配置

(1)lvsdr-basic脚本配置

[root@lvsmaster ~]#cat /etc/init.d/lvsdr-basic

#!/bin/sh

VIP=192.168.137.14

RIP1=192.168.137.130

RIP2=192.168.137.131

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

case "$1" in

start)

echo "start [OK]"

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

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

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

/sbin/ipvsadm -C

/sbin/ipvsadm -A -t$VIP:80 -s rr

/sbin/ipvsadm -a -t$VIP:80 -r $RIP1:80 -g

/sbin/ipvsadm -a -t$VIP:80 -r $RIP2:80 -g

/sbin/ipvsadm

;;

stop)

echo "stop [OK]"

/sbin/ipvsadm -C

;;

*)

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

exit 1

esac

[root@lvsmaster ~]#chmod u+x /etc/init.d/lvsdr-basic

(2)ha.cf配置

[root@lvsmaster ~]#cat /etc/ha.d/ha.cf

debugfile /var/log/ha-debu

logfile /var/log/ha-log

logfacility local0

keepalive 2

warntime 10

deadtime 30

initdead 120

hopfudge 1

udpport 694

bcast eth0

ucast eth0 192.168.137.135

IPauto_failback on

node lvsmaster

node lvsbackup

ping 192.168.137.1

respawn root /usr/lib/heartbeat/ipfail

apiauth ipfail gid=root uid=root

(3)authkeys认证文件的配置

[root@lvsmaster ~]# cat /etc/ha.d/authkeys

auth 3

3 md5 9bf2f23aae3a63c16ea681295ffd7666[root@lvsmaster ~]#chmod u+x 600 authkeys

(4)ldirectord.cf文件配置

[root@lvsmaster ~]# cat /etc/ha.d/ldirectord.cf

checktimeout=3

checkinterval=1

autoreload=no

logfile="/var/log/ldirectord.log"

quiescent=no

virtual=192.168.137.14:80

real=192.168.137.130:80 gate

real=192.168.137.131:80 gate

service=http

request="test.html"

receive="Test"

scheduler=sh

protocol=tcp

(5)haresources文件配置[root@lvsmaster ~]# cat /etc/ha.d/haresources

lvsmaster IPaddr::192.168.137.14/24/eth0 ldirectord lvsdr-basic

(6)关闭ldirectord服务开启heartbeat服务。

[root@lvsmaster ~]# chkconfig --del ldirectord[root@lvsmaster ~]# chkconfig --level 2345 ldirectord off[root@lvsmaster ~]# chkconfig --level 2345 heartbeat on

备份lvs配置(1)switchdr配置

[root@lvsbackup ~]#cat /etc/init.d/switchdr#!/bin/sh

# description: close lo0 and arp_ignore

VIP=192.168.137.14

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

case "$1" in

start)

echo "************* start director server and close tunl ***********"

/sbin/ifconfig lo:0 down

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

;;

stop)

echo "start Real Server"

/sbin/ifconfig eth0:0 down

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

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

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

sysctl -p

;;

*)

echo "Usage: switchdr {start|stop}"

exit 1

esac

[root@lvsbackup ~]#chmod u+x /etc/init.d/switchdr

(2)ha.cf配置

[root@lvsbackup ~]#cat /etc/ha.d/ha.cf

debugfile /var/log/ha-debu

logfile /var/log/ha-log

logfacility local0

keepalive 2

warntime 10

deadtime 30

initdead 120

hopfudge 1

udpport 694

bcast eth0

ucast eth0 192.168.137.134

auto_failback on

node lvsmaster

node lvsbackup

ping 192.168.137.1

respawn root /usr/lib/heartbeat/ipfail

apiauth ipfail gid=root uid=root

(3)authkeys 配置

[root@lvsbackup ~]# cat /etc/ha.d/authkeys

auth 3

3 md5 9bf2f23aae3a63c16ea681295ffd7666[root@lvsbackup ~]#chmod 600 authkeys

(4) ldirectord.cf配置

[root@lvsbackup ~]# cat /etc/ha.d/ldirectord.cf

checktimeout=3

checkinterval=1

autoreload=no

logfile="/var/log/ldirectord.log"

quiescent=no

virtual=192.168.137.14:80

real=192.168.137.130:80 gate

real=192.168.137.131:80 gate

service=http

request="test.html"

receive="Test"

scheduler=sh

protocol=tcp

(5)配置haresources

[root@lvsbackup ~]# cat /etc/ha.d/haresources

lvsmaster IPaddr::192.168.137.14/24/eth0 ldirectord switchdr

(6)关闭ldirectord服务开启heartbeat服务。

[root@lvsbackup ~]# chkconfig --del ldirectord[root@lvsbackup ~]# chkconfig --level 2345 ldirectord off[root@lvsbackup ~]# chkconfig --level 2345 heartbeat on

3、客户端配置ip 192.168.137.131 192.168.137.130

#cat /etc/init.d/realserver

#!/bin/bash

#description : start realserver

VIP=192.168.137.14

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

/sbin/route add -host $VIP dev lo:0echo "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

sysctl -p#chmod u+x /etc/init.d/realserver执行

# /etc/init.d/realserver

查看VIP虚拟ip是否已经绑定：

# ifconfig lo:0

lo:0 Link encap:Local Loopback

inet addr:192.168.137.14 Mask:255.255.255.255

UP LOOPBACK RUNNING MTU:16436 Metric:1

4、启动服务

lvs主

/etc/init.d/heartbeat start

lvs备份

/etc/ini.d/switchdr stop

/etc/init.d/heartbeat start

测试

（1）停掉主备份会接替主,当主恢复时备份自动转为备份状态。

（2）停止一台apache真实服务器。ipvsadm将会自动把这一台机器剔除。

得出结论：不断刷新192.168.137.14，会轮流显示realserver1 web和realserver2 web页面