zabbix監控linux tcp鏈接數

linux：

在linux上手動得到tcp鏈接數的命令爲：

netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S[a]}'

#ESTABLISHED       socket已經創建鏈接  
#CLOSED            socket沒有被使用，無鏈接  
#CLOSING           服務器端和客戶端都同時關閉鏈接  
#CLOSE_WAIT        等待關閉鏈接  
#TIME_WAIT         表示收到了對方的FIN報文，併發送出了ACK報文，等待2MSL後就可回到CLOSED狀態  
#LAST_ACK          遠端關閉，當前socket被動關閉後發送FIN報文，等待對方ACK報文  
#LISTEN            監聽狀態  
#SYN_RECV          接收到SYN報文  
#SYN_SENT          已經發送SYN報文

在zabbix_agent端編輯配置文件:

vi /etc/zabbix/zabbix_agentd.conf
Include=/etc/zabbix/zabbix_agentd.d/

#編寫一個獲取tcp狀態的腳本：
mkdir /etc/zabbix/zabbix_agentd.d/script 
  
#此處注意，必定不要將腳本直接放到/etc/zabbix/zabbix_agentd.d/目錄下，不然zabbix_agent會把它當作本身的配置文件執行，形成重啓不成功
vi /etc/zabbix/zabbix_agentd.d/script/tcp_status.sh

#!/bin/bash
#this script is get tcp status
tmp_file=/tmp/tcp_status.txt
/bin/netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S[a]}' > $tmp_file
 
case $1 in
   closed)
          output=$(awk '/CLOSED/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   listen)
          output=$(awk '/LISTEN/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   synrecv)
          output=$(awk '/SYN_RECV/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   synsent)
          output=$(awk '/SYN_SENT/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   established)
          output=$(awk '/ESTABLISHED/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   timewait)
          output=$(awk '/TIME_WAIT/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   closing)
          output=$(awk '/CLOSING/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   closewait)
          output=$(awk '/CLOSE_WAIT/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
        ;;
   lastack)
          output=$(awk '/LAST_ACK/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
         ;;
   finwait1)
          output=$(awk '/FIN_WAIT1/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
         ;;
   finwait2)
          output=$(awk '/FIN_WAIT2/{print $2}' $tmp_file)
          if [ "$output" == "" ];then
             echo 0
          else
             echo $output
          fi
         ;;
         *)
          echo -e "\e[033mUsage: sh  $0 [closed|closing|closewait|synrecv|synsent|finwait1|finwait2|listen|established|lastack|timewait]\e[0m"
   
esac

#賦予腳本可執行權限
chmod +x /etc/zabbix/zabbix_agentd.d/script/tcp_status.sh

編寫zabbix_agent上的自定義key：

vi /etc/zabbix/zabbix_agentd.conf
UserParameter=tcp.status[*],/etc/zabbix/zabbix_agentd.d/script/tcp_status.sh $1

重啓zabbix_agent:

/etc/init.d/zabbix_agent restart

在服務端測試輸入參數返回的值：

zabbix_get -s 118.190.114.140 -p 10050 -k tcp.status[listen]

最後在zabbix上建立監控項和觸發器，附件中上傳了一個附件，裏面是tcp_status模板，直接在配置——模板——導入便可。