zabbix3.4实现对tcp连接数及状态的监控_zabbix 监控主机tcp连接数

zabbix3.4实现对tcp连接数及状态的监控

一、获取TCP连接数相关方法

方法一：
[root@host-47-98-97-124 scripts]# netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}'
LISTEN 6
ESTABLISHED 64
TIME_WAIT 100

方法二：
[root@host-47-98-97-124 scripts]# ss -ant | awk 'NR>1 {a[$1]++} END {for (b in a) print b,a[b]}'
LISTEN 6
ESTAB 64
TIME-WAIT 100

总结：netstat是遍历/proc下面每个PID目录，ss直接读/proc/net下面的统计信息。所以ss执行的时候消耗资源以及消耗的时间都比netstat少很多。
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二、TCP状态信息描述

ESTABLISHED       socket已经建立连接  
CLOSED            socket没有被使用，无连接  
CLOSING           服务器端和客户端都同时关闭连接  
CLOSE_WAIT        等待关闭连接  
TIME_WAIT         表示收到了对方的FIN报文，并发送出了ACK报文，等待2MSL后就可回到CLOSED状态  
LAST_ACK          远端关闭，当前socket被动关闭后发送FIN报文，等待对方ACK报文  
LISTEN            监听状态  
SYN_RECV          接收到SYN报文  
SYN_SENT          已经发送SYN报文  
FIN_WAIT1         The socket is closed, and the connection is shutting down  
FIN_WAIT2         Connection is closed, and the socket is waiting for a shutdown from the remote end.  
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三、实现zabbix对tcp状态监控

第一步：导入tcp状态监控模板
可以从网上下载tcp状态监控模板，也可以自定义状态监控模板，在这里就不演示了。

第二步：编写tcp状态监控脚本

方法一：
#!/bin/bash

if [ $# -ne 1 ];then
    echo "Follow the script name with an argument "
fi

case $1 in 

    established)   #socket已经建立连接 
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | grep -w ESTABLISHED | cut -d " "  -f 2`
        echo $result
        ;;

    listen)        #监听状态  
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | grep -w LISTEN | cut -d " "  -f 2`
        echo $result
        ;;

    timewait)     #表示收到了对方的FIN报文，并发送出了ACK报文，等待2MSL后就可回到CLOSED状态 
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | grep -w TIME_WAIT | cut -d " "  -f 2`
        echo $result
        ;;

    closed)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/CLOSED/{print $2}'`
        echo $result
        ;;

    closewait)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/CLOSE_WAIT/{print $2}'`
        if [ "$result" == "" ];then
               echo 0
        else
           echo $result
        fi
        ;;

    closing)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/CLOSING/{print $2}'`
        echo $result
        ;;

    finwait1)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/FIN_WAIT1/{print $2}'`
        echo $result
        ;;

    finwait2)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/FIN_WAIT2/{print $2}'`
        echo $result
        ;;

    lastack)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/LAST_ACK /{print $2}'`
        echo $result
        ;;

    synrecv)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/SYN_RECV/{print $2}'`
        echo $result
        ;;

    synsent)
        result=`netstat -an | awk '/^tcp/ {a[$NF]++} END {for (b in a) print b,a[b]}' | awk '/SYN_SENT/{print $2}'`
        echo $result
        ;;  

        *)
          echo -e "\e[033mUsage: sh  $0 [closed|closing|closewait|synrecv|synsent|finwait1|finwait2|listen|established|lastack|timewait]\e[0m"
esac


方法二：
[root@host-47-98-97-124 scripts]# cat Tcp-status.sh 
#!/bin/bash

if [ $# -ne 1 ];then
    echo "Follow the script name with an argument "
fi

case $1 in 

    LISTEN)
        result=`ss -ant | awk 'NR>1 {a[$1]++} END {for (b in a) print b,a[b]}' | awk '/LISTEN/{print $2}'`
        if [ "$result" == "" ];then
               echo 0
        else
           echo $result
        fi
        ;;

    ESTAB)
        result=`ss -ant | awk 'NR>1 {a[$1]++} END {for (b in a) print b,a[b]}' | awk '/ESTAB/{print $2}'`
        if [ "$result" == "" ];then
               echo 0
        else
           echo $result
        fi
        ;;


    CLOSE-WAIT)
        result=`ss -ant | awk 'NR>1 {a[$1]++} END {for (b in a) print b,a[b]}' | awk '/CLOSE-WAIT/{print $2}'`
        if [ "$result" == "" ];then
               echo 0
        else
           echo $result
        fi
        ;;

    TIME-WAIT)
        result=`ss -ant | awk 'NR>1 {a[$1]++} END {for (b in a) print b,a[b]}' | awk '/TIME-WAIT/{print $2}'`
        if [ "$result" == "" ];then
               echo 0
        else
           echo $result
        fi
        ;;

 esac
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四、grafana监控效果图