VRRP笔记三:配置keepalived为实现haproxy高可用的双主模型配置文件示例：

说明：其基本实现思想为创建两个虚拟路由器，并以两个节点互为主从。

! Configuration File for keepalived  

global_defs {
   notification_email {
         linuxedu@foxmail.com
         mageedu@.com
   }
   notification_email_from kanotify@magedu.com
   smtp_connect_timeout
   smtp_server 127.0.0.1
   router_id LVS_DEVEL
}  

vrrp_script chk_haproxy {
    script "killall -0 haproxy"
    interval
    weight
}  

vrrp_script chk_mantaince_down {
   script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
   interval
   weight
}

vrrp_instance VI_1 {
    interface eth0
    state MASTER  # BACKUP for slave routers
    priority   #  for BACKUP
    virtual_router_id
    garp_master_delay  

    authentication {
        auth_type PASS
        auth_pass password
    }
    track_interface {
       eth0
    }
    virtual_ipaddress {
        172.16.100.1/ dev eth0 label eth0:
    }
    track_script {
        chk_haproxy
        chk_mantaince_down
    }  

    notify_master "/etc/keepalived/notify.sh master"
    notify_backup "/etc/keepalived/notify.sh backup"
    notify_fault "/etc/keepalived/notify.sh fault"
} 

vrrp_instance VI_2 {
    interface eth0
    state BACKUP  # BACKUP for slave routers
    priority   #  for BACKUP
    virtual_router_id
    garp_master_delay  

    authentication {
        auth_type PASS
        auth_pass password
    }
    track_interface {
       eth0
    }
    virtual_ipaddress {
        172.16.100.2/ dev eth0 label eth0:
    }
    track_script {
        chk_haproxy
        chk_mantaince_down
    }
}

说明：
、对于VI_1和VI_2来说，两个节点要互为主从关系；