linux lvs DR 负载均衡集群搭建

Director:
    配置网卡：
        配置eth0的ip用以跟其他的realserver通信    
            #ifconfig eth0 192.168.3.1 netmask 255.255.255.0 up
        配置eth0的别名，并将VIP配置上
            #ifconfig eth0:1 192.168.3.100 broadcast 192.168.3.100 netmask 255.255.255.255 up
    打开路由转发功能：
        #echo 1 > /proc/sys/net/ipv4/ip_forward
    配置ipvs规则：
        #ipvsadm -A -t 192.168.3.100:80 -s wlc
        #ipvsadm -a -t 192.168.3.100:80 -r 192.168.3.10 -w 1
        #ipvsadm -a -t 192.168.3.100:80 -r 192.168.3.20 -w 5
        #ipvsadm -a -t 192.168.3.100:80 -r 192.168.3.30 -w 10
    查看ipvs规则：
        #ipvsadm -L -n
          IP Virtual Server version 1.2.1 (size=4096)
          Prot LocalAddress:Port Scheduler Flags
              -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
           TCP  192.168.3.100:80 wlc
              -> 192.168.3.30:80              Route   10     0          0 
              -> 192.168.3.20:80              Route   5     0          0         
              -> 192.168.3.10:80              Route   1      0          0 

Realserver:
    配置网卡：
        配置eth0的ip用以跟Director通信  
            #vim ifcfg-eth0
                DEVICE=eth0
                BOOTPROTO=static
                NETMASK=255.255.255.0
                IPADDR=192.168.3.10
                GATWAY=192.168.3.1
                ONBOOT=yes

        配置lo的别名，并将VIP配置上，当realserver返回数据时将其作为源地址
            #vim ifcfg-lo:1
                DEVICE=lo:1
                IPADDR=192.168.3.100
                NETMASK=255.255.255.255
                BROADCAST=192.168.3.100
                ONBOOT=yes

        添加路由信息,配置到VIP的数据都从lo:1出去：
            #vim /etc/sysconfig/static-routes
                any host 192.168.3.100 dev lo:1

        设置ip_ignore和ip_annouce参数
            #vim /etc/sysctl.conf
                net.ipv4.conf.lo.arp_ignore = 1
                net.ipv4.conf.lo.arp_announce = 2
                net.ipv4.conf.all.arp_ignore = 1
                net.ipv4.conf.all.arp_announce = 2