4台机器， 两台LVS机器通过Keepalived做HA。 两台Web机器

机器信息：

debian: 192.168.0.186 (LVS)

centos:192.168.0.188 (LVS)

debian: 192.168.0.183 (web)

debian: 192.168.0.190 (web)

============

组LVS

两台调度机配置：

centos: yum -y install ipvsadm

debian: apt-get install ipvsadm

ifconfig eth0:0 192.168.0.251 broadcast 192.168.0.255 netmask 255.255.255.0
route add -host 192.168.0.251 dev eth0:0

#配置转发 /etc/sysctrl.conf , net.ipv4.ip_forward=1

ipvsadm –C
ipvsadm -A -t 192.168.0.251:80
ipvsadm -a -t 192.168.0.251:80 -r 192.168.0.190 -w 3
ipvsadm -a -t 192.168.1.251:80 -r 192.168.0.183 -w 3

两台WEB真实机配置：
ifconfig lo:0 192.168.0.251 broadcast 192.168.0.251 netmask 255.255.255.255
#arp抑制
net.ipv4.ip_forward=1
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

============== 以上LVS 配置完成 ===============

==================

两台LVS机器用keepalived 组HA

安装keepalived . debian系统可以apt安装

主、从机的 /etc/keepalived/keepalived.conf 配置文件 大致如下：

! Configuration File for keepalived

global_defs {
   notification_email {
     bigbenz8@hotmail.com
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 150
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 111111
    }
    virtual_ipaddress {
        192.168.0.251
    }
}

virtual_server 192.168.0.251 80{
    delay_loop 3
    lb_algo wlc
    lb_kind DR
    persistence_timeout 1200
    protocol TCP
    ha_suspend
    real_server 192.168.0.183 80{
        weight 3
        TCP_CHECK {
            connect_timeout 3
        }
    }
    real_server 192.168.0.190 80{
        weight 3
        TCP_CHECK {
            connect_timeout 3
        }
    }
}

================= 以上HA配置完成 ============