zabbix系列(七)zabbix3.0新增對tcp連線數及狀態的監控
netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S[a]}'
TIME_WAIT 79
ESTABLISHED 6
LISTEN 3
可以使用man netstat檢視TCP的各種狀態資訊描述
ESTABLISHED socket已經建立連線
CLOSED socket沒有被使用,無連線
CLOSING 伺服器端和客戶端都同時關閉連線
CLOSE_WAIT 等待關閉連線
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被動關閉後傳送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
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.
2.在需要被監控的zabbix-agent端新增指令碼編寫
建立資料夾
mkdir -p /usr/local/zabbix-agent/scripts/
mkdir -p /etc/zabbix/zabbix_agentd.d/
#!/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 $output
fi
;;
timewait)
output=$(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
賦予指令碼執行許可權
chmod o+x /usr/local/zabbix-agent/scripts/tcp_conn_status.sh
3.agent的配置檔案 /etc/zabbix/zabbix_agentd.conf 中定義了其他key的包含目錄 Include=/etc/zabbix/zabbix_agentd.d/, 接著在 /etc/zabbix/zabbix_agentd.d/ 目錄新建一個檔案 tcp-status-params.conf, 內容如下
vim /etc/zabbix/zabbix_agentd.d/tcp-status-params.conf
UserParameter=tcp.status[*],/usr/local/zabbix-agent/scripts/tcp_conn_status.sh $1重啟agent
service zabbix-agent restart
4.zabbix-master服務端測試
zabbix_get -s 192.168.3.86 -p 10050 -k "tcp.status[listen]"
13
5.zabbix web端配置:
登入Zabbix3.0 的web介面,一次選擇 Configuration > Templates , 在主介面的右上角有個 Import 按鈕,用來匯入模板
zabbix-tcp-status.xml
<?xml version="1.0" encoding="UTF-8"?>
<zabbix_export>
<version>2.0</version>
<date>2014-12-04T09:41:57Z</date>
<groups>
<group>
<name>Templates</name>
</group>
</groups>
<templates>
<template>
<template>Template TCP Connection Status</template>
<name>Template TCP Connection Status</name>
<groups>
<group>
<name>Templates</name>
</group>
</groups>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<items>
<item>
<name>CLOSED</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[closed]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>CLOSE_WAIT</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[closewait]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>CLOSING</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[closing]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>ESTABLISHED</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[established]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>FIN_WAIT1</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[finwait1]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>FIN_WAIT2</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[finwait2]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>LAST_ACK</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[lastack]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>LISTEN</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[listen]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>SYN_RECV</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[synrecv]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>SYN_SENT</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[synsent]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
<item>
<name>TIME_WAIT</name>
<type>0</type>
<snmp_community/>
<multiplier>0</multiplier>
<snmp_oid/>
<key>tcp.status[timewait]</key>
<delay>60</delay>
<history>90</history>
<trends>365</trends>
<status>0</status>
<value_type>3</value_type>
<allowed_hosts/>
<units/>
<delta>0</delta>
<snmpv3_contextname/>
<snmpv3_securityname/>
<snmpv3_securitylevel>0</snmpv3_securitylevel>
<snmpv3_authprotocol>0</snmpv3_authprotocol>
<snmpv3_authpassphrase/>
<snmpv3_privprotocol>0</snmpv3_privprotocol>
<snmpv3_privpassphrase/>
<formula>1</formula>
<delay_flex/>
<params/>
<ipmi_sensor/>
<data_type>0</data_type>
<authtype>0</authtype>
<username/>
<password/>
<publickey/>
<privatekey/>
<port/>
<description/>
<inventory_link>0</inventory_link>
<applications>
<application>
<name>TCP Status</name>
</application>
</applications>
<valuemap/>
</item>
</items>
<discovery_rules/>
<macros/>
<templates/>
<screens/>
</template>
</templates>
<triggers>
<trigger>
<expression>{Template TCP Connection Status:tcp.status[timewait].last()}>10000</expression>
<name>There are too many TCP TIME_WAIT status</name>
<url/>
<status>0</status>
<priority>4</priority>
<description/>
<type>0</type>
<dependencies/>
</trigger>
</triggers>
<graphs>
<graph>
<name>TCP Status</name>
<width>900</width>
<height>200</height>
<yaxismin>0.0000</yaxismin>
<yaxismax>100.0000</yaxismax>
<show_work_period>1</show_work_period>
<show_triggers>1</show_triggers>
<type>0</type>
<show_legend>1</show_legend>
<show_3d>0</show_3d>
<percent_left>0.0000</percent_left>
<percent_right>0.0000</percent_right>
<ymin_type_1>0</ymin_type_1>
<ymax_type_1>0</ymax_type_1>
<ymin_item_1>0</ymin_item_1>
<ymax_item_1>0</ymax_item_1>
<graph_items>
<graph_item>
<sortorder>0</sortorder>
<drawtype>0</drawtype>
<color>C80000</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[closed]</key>
</item>
</graph_item>
<graph_item>
<sortorder>1</sortorder>
<drawtype>0</drawtype>
<color>00C800</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[closewait]</key>
</item>
</graph_item>
<graph_item>
<sortorder>2</sortorder>
<drawtype>0</drawtype>
<color>0000C8</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[closing]</key>
</item>
</graph_item>
<graph_item>
<sortorder>3</sortorder>
<drawtype>0</drawtype>
<color>C800C8</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[established]</key>
</item>
</graph_item>
<graph_item>
<sortorder>4</sortorder>
<drawtype>0</drawtype>
<color>00C8C8</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[finwait1]</key>
</item>
</graph_item>
<graph_item>
<sortorder>5</sortorder>
<drawtype>0</drawtype>
<color>C8C800</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[finwait2]</key>
</item>
</graph_item>
<graph_item>
<sortorder>6</sortorder>
<drawtype>0</drawtype>
<color>C8C8C8</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[lastack]</key>
</item>
</graph_item>
<graph_item>
<sortorder>7</sortorder>
<drawtype>0</drawtype>
<color>960000</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[listen]</key>
</item>
</graph_item>
<graph_item>
<sortorder>8</sortorder>
<drawtype>0</drawtype>
<color>009600</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[synrecv]</key>
</item>
</graph_item>
<graph_item>
<sortorder>9</sortorder>
<drawtype>0</drawtype>
<color>000096</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[synsent]</key>
</item>
</graph_item>
<graph_item>
<sortorder>10</sortorder>
<drawtype>0</drawtype>
<color>960096</color>
<yaxisside>0</yaxisside>
<calc_fnc>2</calc_fnc>
<type>0</type>
<item>
<host>Template TCP Connection Status</host>
<key>tcp.status[timewait]</key>
</item>
</graph_item>
</graph_items>
</graph>
</graphs>
</zabbix_export>
在對應主機上新增tcp的監控:
新增報警,當tcp連線數超過5W報警:
{Template TCP Connection Status:tcp.status[established].last()}>50000
最終效果圖:
某些伺服器的established連線很多(3W或更多),如果突然下降到一定的值(1000),這個可能也是問題(可能某個前端的服務出問題了,新的使用者進不來),需要對這個值進行監控
{192.168.1.13:tcp_est_status.last()}<1000
後記:發現通過netstat監控伺服器的tcp等連線數效率比較低,netstat統計佔用大量cpu帶來伺服器額外的壓力,通過ss命令會更加合適,詳情請看:
http://blog.csdn.net/reblue520/article/details/52908966