keepalived主備模式同時都有VIP問題

原始出處：http://bbs.chinaunix.net/thread-4174822-1-1.html 

(出處: http://bbs.chinaunix.net/)

keepalived 主（192.168.1.3）

! Configuration File for keepalived

global_defs {
   notification_email {
     #admin@demo.com
   }
   #notification_email_from admin@demo.com
   #smtp_server 127.0.0.1
   #smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_script chk_nginx {

script "/etc/keepalived/check_nginx.sh"

interval 2

weight 2

}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.1.2
    }
    track_script {
        chk_nginx
    }
}


keepalived 備（192.168.1.4）

! Configuration File for keepalived

global_defs {
   notification_email {
     #admin@michael-demo.com
   }
   #notification_email_from admin@michael-demo.com
   #smtp_server 127.0.0.1
   #smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_script chk_nginx {

script "/etc/keepalived/check_nginx.sh"

interval 2

weight 2
}

vrrp_instance VI_1 {
    state       MASTER
    interface eth0
    virtual_router_id 51
    priority 98
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        221.1.220.206
    }
    track_script {
        chk_nginx
    }
}




如今問題是兩臺機器都有VIP .可是一臺重啓或宕機。另一臺能接管。備機state改成BACKUP模式也白搭！


keepalived 主日誌：

Apr 17 07:30:04 localhost kernel: Bluetooth: RFCOMM socket layer initialized
Apr 17 07:30:04 localhost kernel: Bluetooth: RFCOMM TTY layer initialized
Apr 17 07:30:04 localhost kernel: Bluetooth: RFCOMM ver 1.8
Apr 17 07:30:04 localhost kernel: Bluetooth: HIDP (Human Interface Emulation) ver 1.1
Apr 17 07:36:39 localhost Keepalived_vrrp[2520]: VRRP_Script(chk_nginx) timed out
Apr 17 07:36:39 localhost Keepalived_vrrp[2520]: VRRP_Script(chk_nginx) succeeded
Apr 17 07:36:55 localhost Keepalived_vrrp[2520]: VRRP_Script(chk_nginx) timed out
Apr 17 07:36:55 localhost Keepalived_vrrp[2520]: VRRP_Script(chk_nginx) succeeded
Apr 17 07:54:13 localhost Keepalived_vrrp[2520]: VRRP_Script(chk_nginx) timed out
Apr 17 07:54:13 localhost Keepalived_vrrp[2520]: VRRP_Script(chk_nginx) succeeded


keepalived 備日誌：

Apr 16 23:51:29  Keepalived_vrrp[4733]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)]
Apr 16 23:51:29 Keepalived_vrrp[4733]: VRRP_Script(chk_nginx) succeeded
Apr 16 23:51:30  Keepalived_vrrp[4733]: VRRP_Instance(VI_1) Transition to MASTER STATE
Apr 16 23:51:31  Keepalived_vrrp[4733]: VRRP_Instance(VI_1) Entering MASTER STATE
Apr 16 23:51:31 Keepalived_vrrp[4733]: VRRP_Instance(VI_1) setting protocol VIPs.
Apr 16 23:51:31  Keepalived_healthcheckers[4732]: Netlink reflector reports IP 192.168.1.2 added
Apr 16 23:51:31 Keepalived_vrrp[4733]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.2
Apr 16 23:51:31  avahi-daemon[3246]: Registering new address record for 192.168.1.2 on eth0.
Apr 16 23:51:31  Keepalived_vrrp[4733]: Netlink reflector reports IP 19.168.1.2 added
Apr 16 23:51:36  Keepalived_vrrp[4733]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.1.2


解決方法吧，出現這問題的場景是在阿里VPS雲服務器網絡環境中，由於路由交換層禁用了ARP的廣播限制，形成KEEPALIVE主備協議沒法經過廣播的方式進行通訊，形成主備兩臺服務器都強佔HAVIP地址，出現同時兩臺服務器都有VIP地址的狀況出現，必須經過配置來指定IP的兩臺服務器間進行通信（阿里說明文檔中解釋只能支持兩臺使用同一個HAVIP地址），基於如下方法能夠的狀況下，多備方式用一樣的方式也應該可行 ，有須要的兄弟能夠測試下多IP備的方式（正常狀況須要主備一對主備就夠了）。
在網卡配置後面須要加上如下配置：

    priority 100  ##主服務100 備服務90只要小於100就能夠
    unicast_src_ip  192.168.1.21##（本地IP地址）
    unicast_peer {
                  192.168.1.22##（對端IP地址）此地址必定不能忘記
                       }

（對端IP地址）問題一直沒注意。