keepalived檢測腳本及注意事項

keepalived檢測腳本的作用及注意事項：

1. 預設每隔3秒鐘執行一次檢測腳本，檢查nginx服務是否啟動，如果沒啟動就把nginx服務啟動起來，如果啟動不成功，就把keepalived服務down掉，讓漂浮到備keepalived上

2. 檢測腳本

   #!/bin/bash

   run=`ps -C nginx --no-header | wc -l`

   if [ $run -eq 0 ]

   then

   /usr/local/nginx/sbin/nginx -s stop

   /usr/local/nginx/sbin/nginx

   sleep 3

   if [ `ps -C nginx --no-header | wc -l` ]

   then

   killall keepalived

   fi

   fi

3. 檢測腳本一定要寫在vrrp_instance的前面也就是上面，而且花括号一定要有空格，追蹤trace_script要定在vip的後面，多少人栽在了這上面好多小時

4. vrrp_script check_ng {

   script " /etc/keepalived/check_nginx.sh "

   interval 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 {

   192.168.76.25/24

   }

   track_script {

   check_ng

   }

   }

轉載于:https://www.cnblogs.com/mmdln/p/8988977.html