以下只是簡單的安裝配置，并沒有測試這套負載，各種參數大家可以自己測試

vip：10.0.50.170

lvs server：10.0.50.183

real server：10.0.50.184/185

183/184/185同步時間，并且安裝nginx

# ntpdate time.nist.gov

# yum install nginx

# /etc/init.d/nginx start

在184/185上編寫測試頁面/usr/share/nginx/html/index.html

183上安裝ipvsadm*和keepalived

# yum install keepalived ipvsadm*

# vim /etc/sysctl.conf

net.ipv4.ip_forward = 1

# sysctl -p

# vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived

global_defs {

? ?notification_email {

? ? ?acassen@firewall.loc

? ? ?failover@firewall.loc

? ? ?sysadmin@firewall.loc

? ?}

? ?notification_email_from Alexandre.Cassen@firewall.loc

? ?smtp_server 127.0.0.1

? ?smtp_connect_timeout 30

? ?router_id LVS_DEVEL

}

vrrp_instance VI_1 {

? ? state MASTER

? ? interface em1

? ? virtual_router_id 51

? ? priority 100

? ? advert_int 1

? ? authentication {

? ? ? ? auth_type PASS

? ? ? ? auth_pass 1111

? ? }

? ? virtual_ipaddress {

? ? ? ? 10.0.50.170

? ? }

}

virtual_server 10.0.50.170 80 {

? ? delay_loop 6

? ? lb_algo rr

? ? lb_kind DR

? ? nat_mask 255.255.255.0

? ? persistence_timeout 50

? ? protocol TCP

? ? real_server 10.0.50.184 80 {

? ? ? ? weight 1

? ? ? ? TCP_CHECK {

? ? ? ? ? ? connect_timeout 3

? ? ? ? ? ? nb_get_retry 3

? ? ? ? ? ? delay_before_retry 3

? ? ? ? }

? ? }

? ? real_server 10.0.50.185 80 {

? ? ? ? weight 1

? ? ? ? TCP_CHECK {

? ? ? ? ? ? connect_timeout 3

? ? ? ? ? ? nb_get_retry 3

? ? ? ? ? ? delay_before_retry 3

? ? ? ? }

? ? }

}

# /etc/init.d/keepalived start

# chkconfig keepalived on

# cd /etc/init.d/

# vi lvs

#!/bin/sh

# description: Start LVS of Director server

WEB_VIP=10.0.50.170

WEB_RIP1=10.0.50.184

WEB_RIP2=10.0.50.185

SET_VIP () {

/sbin/ifconfig em1:0 $WEB_VIP netmask 255.255.255.0 broadcast $WEB_VIP up

/sbin/route add -host $WEB_VIP dev em1:0

/sbin/ipvsadm -A -t $WEB_VIP:80 -s wrr -p 3

/sbin/ipvsadm -a -t $WEB_VIP:80 -r $WEB_RIP1:80 -g -w 1

/sbin/ipvsadm -a -t $WEB_VIP:80 -r $WEB_RIP2:80 -g -w 1

}

case "$1" in

?start)

? /sbin/ipvsadm -C

? SET_VIP

? touch /var/lock/ipvsadm >/dev/null 2>&1

? echo "ipvsadm start"

;;

?stop)

?/sbin/ipvsadm -C

?/sbin/ipvsadm -Z

?/sbin/ifconfig em1:0 down

?route del $WEB_VIP > /dev/null 2>&1

? rm -fr /var/lock/ipvsadm >/dev/null 2>&1

?echo "ipvsadm stoped"

;;

?status)

?if [ ! -e /var/lock/ipvsadm ];then

? ? ?echo "ipvsadm is stoped "

? ?exit 1

else

? /sbin/ipvsadm -ln

? ? echo "ipvsadm is ok"

fi

;;

?restart)

?/sbin/ipvsadm -C

?/sbin/ipvsadm -Z

?/sbin/ifconfig em1:0 down

? route del $WEB_VIP > /dev/null 2>&1

? rm -fr /var/lock/ipvsadm >/dev/null 2>&1

?SET_VIP

? touch /var/lock/ipvsadm >/dev/null 2>&1

? echo "ipvsadm ?restart .."

;;

*)

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

? ?exit 1

esac

?exit 0

# /etc/init.d/lvs start

184/185機器都執行lvsrs腳本

# vi lvsrs

#!/bin/bash

#!/bin/bash

#description : start Real Server

VIP=10.0.50.170

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

case "$1" in

? ? ? ? start)

? ? ? ? echo " Start LVS of Real Server "

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

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

? ? ? ? #注釋：這四句目的是為了關閉ARP廣播響應，使VIP不能向網絡內發送廣播，以防止網絡出現混亂

? ? ? ? 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

? ? ? ? ;;

? ? ? ? stop)

? ? ? ? /sbin/ifconfig lo:0 down

? ? ? ? echo "close LVS Director server"

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

? ? ? ? exit 1

esac

# /etc/init.d/lvsrs start

參考http://blog.sina.com.cn/s/blog_6e834de50100pnfr.html

1.我同事曾經問過兩臺物理機的實現：

例如以上183/184上同時安裝并啟動nginx\keepalived\lvs腳本\lvsrs腳本

2.關于以下兩個區別：

/sbin/ipvsadm -A -t $WEB_VIP:80 -s wrr -p 3

或者/sbin/ipvsadm -A -t $WEB_VIP:80 -s rr

轉載于:https://blog.51cto.com/guowang327/1669873

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