CentOS5.5搭建LVS环境

时间:2015-04-07 18:25来源:btschina.com 作者:btschina.com 举报 点击:

CentOS5.5 + LVS(Master+Slave)+ 2 WEB,

Web提前配置好页面,以便区分是分配到哪台真机上,

实验前防火墙、selinux关闭。

 

1. 下载相关软件包
#wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
#wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz

2. 安装LVS和Keepalived

#lsmod |grep ip_vs
#uname -r

2.6.18-274.17.1.el5xen

#tar zxvf ipvsadm-1.24.tar.gz

#cd ipvsadm-1.24
#make && make install

 

#tar zxvf keepalived-1.1.15.tar.gz

#cd keepalived-1.1.15

#./configure –prefix=/usr/local/keepalived–with-kernel-dir=/usr/src/linux/

#make && make install

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

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

#mkdir /etc/keepalived

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

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

# /etc/init.d/keepalived start

Startingkeepalived:                                       [  OK  ]

 

3.配置keepalived.conf,如下:

Master机器配置:

#VIP1

vrrp_instance VI_1 {

stateBACKUP

# lvs_sync_daemon_interface eth1

nopreempt

interfaceeth0

virtual_router_id 62

priority100     # 备份服务上将100改为99

advert_int3

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.2.228/16 brd 192.168.255.255 deveth0 label eth0:0 ### bt web 的vip

}

}

 

virtual_server 192.168.2.228 80 {

delay_loop6                  #(每隔10秒查询realserver状态)

lb_algowrr                  #(lvs 算法)

lb_kindDR                  #(Direct Route)

persistence_timeout 60        #(同一IP的连接60秒内被分配到同一台realserver)

inhibit_on_failure

protocolTCP                #(用TCP协议检查realserver状态)

 

real_server192.168.2.184 80 {

weight10

notify_down  “/root/bin/notify_mail.sh btweb01192.168.2.184″

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

}

}

real_server192.168.2.199 80 {

weight 10

notify_down ”/root/bin/notify_mail.sh btweb02 192.168.2.199″

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

}

}

}

 

Slave机器配置:

# VIP1

vrrp_instance VI_1 {

stateBACKUP             #备份服务器上将MASTER改为BACKUP

# lvs_sync_daemon_interface eth1

nopreempt

interfaceeth0

virtual_router_id62

priority100     # 备份服务上将100改为99

advert_int3

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.2.228/16 brd 192.168.255.255 dev eth0 label eth0:0 ### btweb 的vip

}

}

 

virtual_server 192.168.2.228 80 {

delay_loop6                  #(每隔10秒查询realserver状态)

lb_algowrr                  #(lvs 算法)

lb_kindDR                  #(Direct Route)

persistence_timeout 60        #(同一IP的连接60秒内被分配到同一台realserver)

inhibit_on_failure

protocolTCP                #(用TCP协议检查realserver状态)

 

real_server192.168.2.184 80 {

weight10

notify_down ”/root/bin/notify_mail.sh btweb01 192.168.2.184″

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

}

}

real_server192.168.2.199 80 {

weight10

notify_down ”/root/bin/notify_mail.sh btweb02 192.168.2.199″

TCP_CHECK {

connect_timeout 10

nb_get_retry 3

delay_before_retry 3

connect_port 80

}

}

}

 

5.real机器配置

[root@vm02 ~]# more lvs_real.sh

#!/bin/bash

SNS_VIP=192.168.2.228

 

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

 

case”$1″ in

start)

ifconfig lo:0 $SNS_VIP netmask 255.255.255.255 broadcast $SNS_VIP

/sbin/route add -host $SNS_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 >/dev/null 2>&1

echo “RealServer Start OK”

 

;;

stop)

ifconfig lo:0 down

route del $SNS_VIP >/dev/null 2>&1

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

echo “RealServer Stoped”

;;

*)

echo “Usage: $0 {start|stop}”

exit 1

esac

 

exit0

 

6.测试

 

[root@test1 ~]# ipvsadm -Ln

IP Virtual Server version 1.2.1 (size=4096)

Prot LocalAddress:Port Scheduler Flags

-> RemoteAddress:Port           Forward Weight ActiveConn InActConn

TCP  192.168.2.228:80 wrr persistent 60

-> 192.168.2.184:80             Route   10     0          0

-> 192.168.2.199:80             Route   10     0          5

禁用realserver机器:

ipvsadm -d -t 192.168.2.228:80 -r 192.168.2.199:80

启用realserver机器:

ipvsadm -a -t 192.168.2.228:80 -r 192.168.2.199:80

1.关掉任何一台web或nginx,网页能正常访问。

2.关闭任何一台lvs,网页能正常访问。

证明实验成功。

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