lvs+frmark

[root@nagios ~]# ln -s  /usr/src/kernels/2.6.18-308.13.1.el5-x86_64/ /usr/src/linux

[root@nagios ~]# yum install ipvsadm

[root@nagios ~]# tar -zxvf keepalived-1.2.7.tar.gz  -C /usr/local

[root@nagios ~]# cd keepalived-1.2.7/

[root@nagios ~]# ./configure 

[root@nagios ~]# make && make install

[root@nagios ~]# cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/

[root@nagios ~]# cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/

[root@nagios ~]# mkdir /etc/keepalived

[root@nagios ~]# cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/

[root@nagios ~]#  cp /usr/local/sbin/keepalived /usr/sbin/

[root@nagios ~]# service keepalived start

[root@nagios ~]# vim /etc/keepalived/keepalived.conf

修改配置文件內容如下

! Configuration File for keepalived

global_defs {

    notification_email {

          yhl5555@126.com

    }

    notification_email_from yhl5555@126.com

    smtp_server 127.0.0.1

   # smtp_connect_timeout 30

    router_id LVS_DEVEL

}

# VIP1

vrrp_instance VI_1 {

     state MASTER

     interface eth0

     virtual_router_id 50

     priority 100

     advert_int 1

     authentication {

         auth_type PASS

         auth_pass 1111

     }

     virtual_ipaddress {

         172.16.1.160

     }

}

virtual_server fwmark 1 {

     delay_loop 6

     lb_algo wrr

     lb_kind DR

 #    persistence_timeout 60

     protocol TCP

     real_server 172.16.1.171 80 {

         weight 3              

         TCP_CHECK {

         connect_timeout 10       

         nb_get_retry 3

         delay_before_retry 3

         connect_port 80

         }

     }

}

virtual_server fwmark 2 {

     delay_loop 6

     lb_algo wrr

     lb_kind DR

 #    persistence_timeout 60

     protocol TCP

     real_server 172.16.1.172 80 {

         weight 3

         TCP_CHECK {

         connect_timeout 10

         nb_get_retry 3

         delay_before_retry 3

         connect_port 80

         }

     }

}  

在lvs調度器上面操作

注意：mangle表的匹配順序是從下到上

[root@nagios ~]# iptables -t mangle -I PREROUTING -s 172.16.0.68 -p tcp -d 172.16.1.160 --dport 80  -j MARK --set-mark 1

[root@nagios ~]# iptables -t mangle -I  PREROUTING -s 172.16.1.173 -p tcp -d 172.16.1.160 --dport 80  -j MARK --set-mark 2

分別在兩臺web服務器上執行realserver.sh綁定虛擬ip，腳本內容如下

#!/bin/bash

SNS_VIP=172.16.1.160

. /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

exit 0

測試效果

1、當來源ip為172.16.0.68的主機訪問目標地址172.16.1.160的80端口時，轉向了keepalived定義的fwmark 1規則

2、當來源ip為172.16.1.173的主機訪問目標地址172.16.1.160的80端口時，轉向了keepalived定義的fwmark 1規則