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 {
         [email protected]
         [email protected]126.com
   }
   notification_email_from [email protected]
   smtp_connect_timeout 3
   smtp_server 127.0.0.1
   router_id LVS_DEVEL
}  

vrrp_script chk_haproxy {
    script "killall -0 haproxy"
    interval 1
    weight 2
}  

vrrp_script chk_mantaince_down {
   script "[[ -f /etc/keepalived/down ]] && exit 1 || exit 0"
   interval 1
   weight 2
}

vrrp_instance VI_1 {
    interface eth0
    state MASTER  # BACKUP for slave routers
    priority 101  # 100 for BACKUP
    virtual_router_id 51
    garp_master_delay 1 

    authentication {
        auth_type PASS
        auth_pass password
    }
    track_interface {
       eth0
    }
    virtual_ipaddress {
        172.16.100.1/16 dev eth0 label eth0:0
    }
    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 100  # 100 for BACKUP
    virtual_router_id 52
    garp_master_delay 1 

    authentication {
        auth_type PASS
        auth_pass password
    }
    track_interface {
       eth0
    }
    virtual_ipaddress {
        172.16.100.2/16 dev eth0 label eth0:1
    }
    track_script {
        chk_haproxy
        chk_mantaince_down
    }
}

说明：
1、对于VI_1和VI_2来说，两个节点要互为主从关系；