参考http://john88wang.blog.51cto.com/2165294/1586234/
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[$1]} END {for (a in S) {printf "%11-s %s\n",a,S[a]}}‘
LISTEN 9
ESTAB 1
State 1
TIME-WAIT 110
第二种监控方法用netstat
/bin/netstat -an|awk ‘/^tcp/{++S[$NF]}END{for(a in S) print a,S[a]}‘
LISTEN 9
ESTABLISHED 1
SYN_SENT 1
TIME_WAIT 126
3 监控脚本编写
vi /usr/local/zabbix/scripts/tcp.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[a]}‘ > $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)
4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.sh $1
然后重启agentd服务
5 测试链接
zabbix_get -s 192.168.234.133 -p 10055 -k tcp.status[timewait]
6 倒入模板，确认出图
