lvs+frmark

shuijingping

[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
修改配置文件内容如下
! 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调度器上面操作
注意：mangle表的匹配顺序是从下到上
[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
分别在两台web服务器上执行realserver.sh绑定虚拟ip，脚本内容如下
#!/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
测试效果
1、当来源ip为172.16.0.68的主机访问目标地址172.16.1.160的80端口时，转向了keepalived定义的fwmark 1规则

2、当来源ip为172.16.1.173的主机访问目标地址172.16.1.160的80端口时，转向了keepalived定义的fwmark 1规则