ZABBIX 3.4 监控服务器TCP连接状态(六)

TCP的连接状态对于我们web服务器来说是至关重要的,尤其是并发量ESTAB;或者是syn_recv值,假如这个值比较大的话我们可以认为是不是受到了攻击,或是是time_wait值比较高的话,我们要考虑看我们内核是否需要调优,太高的time_wait值的话会占用太多端口,要是端口少的话后果不堪设想

 一、TCP状态介绍

 

1、man netstat查看TCP的各种状态信息描述:

LISTEN -侦听来自远方TCP端口的连接请求; 

SYN-SENT -在发送连接请求后等待匹配的连接请求; 

SYN-RECEIVED -在收到和发送一个连接请求后等待对连接请求的确认; 

ESTABLISHED -代表一个打开的连接,数据可以传送给用户; 

FIN-WAIT-1 -等待远程TCP的连接中断请求,或先前的连接中断请求的确认;

FIN-WAIT-2 -从远程TCP等待连接中断请求; 

CLOSE-WAIT -等待从本地用户发来的连接中断请求; 

CLOSING -等待远程TCP对连接中断的确认; 

LAST-ACK -等待原来发向远程TCP的连接中断请求的确认; 

TIME-WAIT -等待足够的时间以确保远程TCP接收到连接中断请求的确认; 

CLOSED -没有任何连接状态;

2、监控原理
[root@Node1 ~]# /bin/netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S[a]}'  //通过netstat获取相关值
LISTEN 10
ESTABLISHED 1
TIME_WAIT 178
[root@Node1 ~]# 

 

二、监控脚本编写

1、编写脚本,放于 /etc/zabbix/zabbix_agentd.d/目录下

 1 [root@Node1 zabbix_agentd.d]# cat tcp_status.sh
 2 #!/bin/bash
 3 #This script is used to get tcp and udp connetion status
 4 #tcp status
 5 metric=$1
 6 tmp_file=/tmp/tcp_status.txt
 7 /bin/netstat -an|awk '/^tcp/{++S[$NF]}END{for(a in S) print a,S[a]}' > $tmp_file
 8 case $metric in
 9    closed)
10           output=$(awk '/CLOSED/{print $2}' $tmp_file)
11           if [ "$output" == "" ];then
12              echo 0
13           else
14              echo $output
15           fi
16         ;;
17    listen)
18           output=$(awk '/LISTEN/{print $2}' $tmp_file)
19           if [ "$output" == "" ];then
20              echo 0
21           else
22              echo $output
23           fi
24         ;;
25    synrecv)
26           output=$(awk '/SYN_RECV/{print $2}' $tmp_file)
27           if [ "$output" == "" ];then
28              echo 0
29           else
30              echo $output
31           fi
32         ;;
33    synsent)
34           output=$(awk '/SYN_SENT/{print $2}' $tmp_file)
35           if [ "$output" == "" ];then
36              echo 0
37           else
38              echo $output
39           fi
40         ;;
41    established)
42           output=$(awk '/ESTABLISHED/{print $2}' $tmp_file)
43           if [ "$output" == "" ];then
44              echo 0
45           else
46              echo $output
47           fi
48         ;;
49    timewait)
50           output=$(awk '/TIME_WAIT/{print $2}' $tmp_file)
51           if [ "$output" == "" ];then
52              echo 0
53           else
54              echo $output
55           fi
56         ;;
57    closing)
58           output=$(awk '/CLOSING/{print $2}' $tmp_file)
59           if [ "$output" == "" ];then
60              echo 0
61           else
62              echo $output
63           fi
64         ;;
65    closewait)
66           output=$(awk '/CLOSE_WAIT/{print $2}' $tmp_file)
67           if [ "$output" == "" ];then
68              echo 0
69           else
70              echo $output
71           fi
72         ;;
73    lastack)
74           output=$(awk '/LAST_ACK/{print $2}' $tmp_file)
75           if [ "$output" == "" ];then
76              echo 0
77           else
78              echo $output
79           fi
80          ;;
81    finwait1)
82           output=$(awk '/FIN_WAIT1/{print $2}' $tmp_file)
83           if [ "$output" == "" ];then
84              echo 0
85           else
86              echo $output
87           fi
88          ;;
89    finwait2)
90           output=$(awk '/FIN_WAIT2/{print $2}' $tmp_file)
91           if [ "$output" == "" ];then
92              echo 0
93           else
94              echo $output
95           fi
96          ;;
97          *)
98           echo -e "\e[033mUsage: sh  $0 [closed|closing|closewait|synrecv|synsent|finwait1|finwait2|listen|established|lastack|timewait]\e[0m"
99 esac

 

赋予脚本执行权限:

[root@Node1 ~]# chmod a+x /etc/zabbix/zabbix_agentd.d/tcp_status.sh   //赋予执行权限
[root@Node1 ~]# ll /etc/zabbix/zabbix_agentd.d/tcp_status.sh
-rwxr-xr-x 1 root root 2502 Jan 18 09:48 /etc/zabbix/zabbix_agentd.d/tcp_status.sh
[root@Node1 ~]# 

2、添加zabbix配置文件,放于 /etc/zabbix/zabbix_agentd.d/目录下(agent的配置文件 /etc/zabbix/zabbix_agentd.conf 中定义了其他key的包含目录)创建配置文件tcp_status.conf

[root@Node1 ~]# cat /etc/zabbix/zabbix_agentd.d/tcp_status.conf 
UserParameter=tcp.status[*],/etc/zabbix/zabbix_agentd.d/tcp_status.sh "$1"   //脚本路径
[root@Node1 ~]# 

3、确保配置Agent配置文件开启自定义参数UnsafeUserParameters=1

[root@Node1 ~]# grep -n "^[a-Z]" /etc/zabbix/zabbix_agentd.conf
13:PidFile=/var/run/zabbix/zabbix_agentd.pid
32:LogFile=/var/log/zabbix/zabbix_agentd.log
43:LogFileSize=0
57:DebugLevel=3
97:Server=172.17.21.208
138:ServerActive=172.17.21.208
149:Hostname=Node1.contoso.com
267:Include=/etc/zabbix/zabbix_agentd.d/*.conf    
286:UnsafeUserParameters=1                //1代表允许,0代表关闭

4、重启zabbix-agent服务

[root@Node1 ~]# systemctl restart zabbix-agent.service 

  备注:因为脚本是把tcp的一些信息存放在/tmp/下,为了zabbix可以读取到我们设置zabbix可以读的权限,确保属主与属组都为zabbix即可

[root@Node1 ~]# chown zabbix.zabbix /tmp/tcp_status.txt   //改变属主与属主
[root@Node1 ~]# ll /tmp/tcp_status.txt
-rw-rw-r-- 1 zabbix zabbix 38 Jan 18 11:32 /tmp/tcp_status.txt

5、在zabbix servere服务器上测试,是否能正常获取数据

[root@Node3 ~]# zabbix_get -s 172.17.21.206 -p 10050 -k "tcp.status[listen]"
0
[root@Node3 ~]# zabbix_get -s 172.17.21.206 -p 10050 -k "tcp.status[timewait]"
183
[root@Node3 ~]# zabbix_get -s 172.17.21.206 -p 10050 -k "tcp.status[established]"
2
[root@Node3 ~]# 

 

三、WEB界面配置

1、导入事先准备好的TCP Connection Status模板,Configuration-->Templates-->Import,选择相应的模板,点击Import即可


   2、关联模板,Configuration-->Hosts-->Node1--Templates,选择模板,点击Updtae即可

 

3、查看TCP状态:

Monitoring-->Graphs-->Host(Node1)-->Grahp(TCP Status)

 

附模板:Template_TCP_Status.xml

<?xml version="1.0" encoding="UTF-8"?>
<zabbix_export>
    <version>3.4</version>
    <date>2018-01-18T11:10:22Z</date>
    <groups>
        <group>
            <name>Templates</name>
        </group>
    </groups>
    <templates>
        <template>
            <template>Template TCP Connection Status</template>
            <name>Template TCP Connection Status</name>
            <description/>
            <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/>
                    <snmp_oid/>
                    <key>tcp.status[closed]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>CLOSE_WAIT</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[closewait]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>CLOSING</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[closing]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>ESTABLISHED</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[established]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>FIN_WAIT1</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[finwait1]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>FIN_WAIT2</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[finwait2]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>LAST_ACK</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[lastack]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>LISTEN</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[listen]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>SYN_RECV</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[synrecv]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>SYN_SENT</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[synsent]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
                <item>
                    <name>TIME_WAIT</name>
                    <type>0</type>
                    <snmp_community/>
                    <snmp_oid/>
                    <key>tcp.status[timewait]</key>
                    <delay>60s</delay>
                    <history>90d</history>
                    <trends>365d</trends>
                    <status>0</status>
                    <value_type>3</value_type>
                    <allowed_hosts/>
                    <units/>
                    <snmpv3_contextname/>
                    <snmpv3_securityname/>
                    <snmpv3_securitylevel>0</snmpv3_securitylevel>
                    <snmpv3_authprotocol>0</snmpv3_authprotocol>
                    <snmpv3_authpassphrase/>
                    <snmpv3_privprotocol>0</snmpv3_privprotocol>
                    <snmpv3_privpassphrase/>
                    <params/>
                    <ipmi_sensor/>
                    <authtype>0</authtype>
                    <username/>
                    <password/>
                    <publickey/>
                    <privatekey/>
                    <port/>
                    <description/>
                    <inventory_link>0</inventory_link>
                    <applications>
                        <application>
                            <name>TCP Status</name>
                        </application>
                    </applications>
                    <valuemap/>
                    <logtimefmt/>
                    <preprocessing/>
                    <jmx_endpoint/>
                    <master_item/>
                </item>
            </items>
            <discovery_rules/>
            <httptests/>
            <macros/>
            <templates/>
            <screens/>
        </template>
    </templates>
    <triggers>
        <trigger>
            <expression>{Template TCP Connection Status:tcp.status[listen].last()}&gt;500</expression>
            <recovery_mode>0</recovery_mode>
            <recovery_expression/>
            <name>There are too many TCP LISTEN status</name>
            <correlation_mode>0</correlation_mode>
            <correlation_tag/>
            <url/>
            <status>0</status>
            <priority>4</priority>
            <description/>
            <type>0</type>
            <manual_close>0</manual_close>
            <dependencies/>
            <tags/>
        </trigger>
        <trigger>
            <expression>{Template TCP Connection Status:tcp.status[timewait].last()}&gt;10000</expression>
            <recovery_mode>0</recovery_mode>
            <recovery_expression/>
            <name>There are too many TCP TIME_WAIT status</name>
            <correlation_mode>0</correlation_mode>
            <correlation_tag/>
            <url/>
            <status>0</status>
            <priority>4</priority>
            <description/>
            <type>0</type>
            <manual_close>0</manual_close>
            <dependencies/>
            <tags/>
        </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>
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        </graph>
    </graphs>
</zabbix_export>
View Code

 

https://www.cnblogs.com/cloudos/
posted @ 2018-01-18 12:53  cloudos  阅读(2165)  评论(0编辑  收藏  举报