cacti监控TCP端口连接数

 

今天动手做了个监控nginx连接数的模板：

 

修改被监控端snmpd.conf,在最后增加一行：

[root@localhost ~]# vim /etc/snmp/snmpd.conf

extend .1.3.6.1.4.1.2021.21 webconn /bin/bash /etc/snmp/webconn.sh

 

再在/etc/snmp下创建获取端口连接数的脚本webconn.sh

#!/bin/sh
#If more than one IP or port Please '|' separated
ip="58.251.x.x|119.145.x.x"  #我们服务器是双线接入，所以有2个IP
port="80|443"                #我这里是监控80和443端口
webconn=`netstat -nt |grep ESTABLISHED |awk '{print $4}'|awk '/('$ip'):('$port')/'| wc -l`
websyn=`netstat -nt |grep SYN_RECV |awk '{print $4}'|awk '/('$ip'):('$port')/'| wc -l`
weback=`netstat -nt |grep LAST_ACK |awk '{print $4}'|awk '/('$ip'):('$port')/'| wc -l`
webwait=`netstat -nt |grep TIME_WAI |awk '{print $4}'|awk '/('$ip'):('$port')/'| wc -l`
echo $webconn
echo $websyn
echo $weback
echo $webwait
再赋予脚本可执行权限

[root@localhost ~]# chmod a+x /etc/snmp/webconn.sh

[root@localhost ~]# service snmpd restart

 

接下来在cacti上验证看能否通过snmp抓取到客户端的数据：

[root@monitor ~]# snmpwalk -v 2c -c public 172.16.88.10 .1.3.6.1.4.1.2021.21
UCD-SNMP-MIB::ucdavis.21.1.0 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.21.2.1.2.7.119.101.98.99.111.110.110 = STRING: "/bin/bash"
UCD-SNMP-MIB::ucdavis.21.2.1.3.7.119.101.98.99.111.110.110 = STRING: "/etc/snmp/webconn.sh"
UCD-SNMP-MIB::ucdavis.21.2.1.4.7.119.101.98.99.111.110.110 = ""
UCD-SNMP-MIB::ucdavis.21.2.1.5.7.119.101.98.99.111.110.110 = INTEGER: 5
UCD-SNMP-MIB::ucdavis.21.2.1.6.7.119.101.98.99.111.110.110 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.21.2.1.7.7.119.101.98.99.111.110.110 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.21.2.1.20.7.119.101.98.99.111.110.110 = INTEGER: 4
UCD-SNMP-MIB::ucdavis.21.2.1.21.7.119.101.98.99.111.110.110 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.21.3.1.1.7.119.101.98.99.111.110.110 = STRING: "221"
UCD-SNMP-MIB::ucdavis.21.3.1.2.7.119.101.98.99.111.110.110 = STRING: "221
16
1
19"
UCD-SNMP-MIB::ucdavis.21.3.1.3.7.119.101.98.99.111.110.110 = INTEGER: 4
UCD-SNMP-MIB::ucdavis.21.3.1.4.7.119.101.98.99.111.110.110 = INTEGER: 0
UCD-SNMP-MIB::ucdavis.21.4.1.2.7.119.101.98.99.111.110.110.1 = STRING: "221"
UCD-SNMP-MIB::ucdavis.21.4.1.2.7.119.101.98.99.111.110.110.2 = STRING: "16"
UCD-SNMP-MIB::ucdavis.21.4.1.2.7.119.101.98.99.111.110.110.3 = STRING: "1"
UCD-SNMP-MIB::ucdavis.21.4.1.2.7.119.101.98.99.111.110.110.4 = STRING: "19"

 

若有上面的输出则说明成功了，接下来就只要建cacti的模板了，这里就不讲建立模板的过程了，我已经把模板导出来，有需要可下载附件包含模板和脚本

 

文件:	监控tcp端口连接数模板.rar
大小:	11KB
下载:	下载

 

另外我的cacti是0.8.7f的，不同版本模板的hash值不一样，所以非0.8.7f版本的cacti导入此模板会报错，不过可将模板里的0020全部替换成你所用版本的 hash值就可以解决，下面是每个版本对应的hash值：
   1. "0.8.4"  => "0000",  
   2. "0.8.5"  => "0001",  
   3. "0.8.5a" => "0002",  
   4. "0.8.6"  => "0003",  
   5. "0.8.6a" => "0004",  
   6. "0.8.6b" => "0005",  
   7. "0.8.6c" => "0006",  
   8. "0.8.6d" => "0007",  
   9. "0.8.6e" => "0008",  
  10. "0.8.6f" => "0009",  
  11. "0.8.6g" => "0010",  
  12. "0.8.6h" => "0011",  
  13. "0.8.6i" => "0012",  
  14. "0.8.6j" => "0013",  
  15. "0.8.7"  => "0014",  
  16. "0.8.7a" => "0015",  
  17. "0.8.7b" => "0016",  
  18. "0.8.7c" => "0017",  
  19. "0.8.7d" => "0018" 
  20. "0.8.7e" => "0019"
  21. "0.8.7f" => "0020"