zabbix监控tcp连接数
tcp各个状态的意思：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 The socket is waiting after close to handle packets still in the network. 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 The remote end has shut down, and the socket is closed. Waiting for acknowledgement. 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.
1 搭建环境：
zabbix server :centos 6 ip 192.168.234.134
zabbix client (nginx) :centos 7 ip:192.168.234.133
2 监控方法：
第一种监控方法用ss/usr/sbin/ss state all | awk '{++S[$1]} END {for (a in S) {printf "%11-s %s\n",a,S}}'
LISTEN 9
ESTAB 1
State 1
TIME-WAIT 110第二种监控方法用netstat/bin/netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S}'
LISTEN 9
ESTABLISHED 1
SYN_SENT 1
TIME_WAIT 1263 监控脚本编写
vi /usr/local/zabbix/scripts/tcp_status.sh#!/bin/bash
#this script is used to get tcp and udp connetion status
#tcp status
metric=$1
tmp_file=/tmp/tcp_status.txt
/bin/netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S}' > $tmp_file
case $metric in
closed)
output=$(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\e[0m"
esac4添加zabbix客户端配置文件vi /usr/local/zabbix/etc/zabbix_agentd.conf 添加
UserParameter=tcp.status[*],/usr/local/zabbix/scripts/tcp_status.sh $1然后重启agentd服务
5 测试链接zabbix_get -s 192.168.234.133 -p 10050 -k tcp.status6 倒入模板，确认出图
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