（39）zabbix snmp自定义OID nginx监控实例

为什么要自定义OID？

前面的文章已经讲过zabbix如何使用snmp监控服务器，但是他有一个很明显的局限性：只能监控定义好的OID项目

假如我们想知道nginx进程是否在运行？在没有zabbix agent的情况下，我们该怎么做呢？

接下来就用这个实力来讲解自定义OID

确认SNMP OID是否存在

首先我们需要找一个oid是否被系统暂用，比如.1.3.6.1.4.1.2021.5000

 

1 2	# snmpwalk -v 2c -c public  10.0.91.10  .1.3.6.1.4.1.2021.5000 UCD-SNMP-MIB::ucdavis.5000 = No Such Object available on this agent at this OID

如上说明不存在

增加自定SNMP OID

编写脚本获取nginx进程数

 

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# cat /root/scripts/check_nginx.sh #!/bin/bash nginxNum=`/bin/ps aux | /bin/grep nginx | wc -l` echo $nginxNum

修改配置

 

1 2	# vim /etc/snmp/snmpd.conf extend .1.3.6.1.4.1.2021.5000  check_nginx /root/scripts/check_nginx.sh  // 增加这一行

重启10.0.91.10主机上的snmpd服务

systemctl  restart snmpd

systemctl  status  snmpd

获取snmp信息

以下获取自定义的oid的所有数据，第一行便是我们需要获取的数据，那么在zabbix中写oid .1.3.6.1.4.1.2021.5000.4.1.2.11.99.104.101.99.107.95.110.103.105.110.120.1

 

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# snmpwalk -v 1 -c public 10.0.91.10  .1.3.6.1.4.1.2021.5000 UCD-SNMP-MIB::ucdavis.5000.1.0 = INTEGER: 1 UCD-SNMP-MIB::ucdavis.5000.2.1.2.11.99.104.101.99.107.95.110.103.105.110.120 = STRING: "/root/scripts/check_nginx.sh" UCD-SNMP-MIB::ucdavis.5000.2.1.3.11.99.104.101.99.107.95.110.103.105.110.120 = "" UCD-SNMP-MIB::ucdavis.5000.2.1.4.11.99.104.101.99.107.95.110.103.105.110.120 = "" UCD-SNMP-MIB::ucdavis.5000.2.1.5.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 5 UCD-SNMP-MIB::ucdavis.5000.2.1.6.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 1 UCD-SNMP-MIB::ucdavis.5000.2.1.7.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 1 UCD-SNMP-MIB::ucdavis.5000.2.1.20.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 4 UCD-SNMP-MIB::ucdavis.5000.2.1.21.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 1 UCD-SNMP-MIB::ucdavis.5000.3.1.1.11.99.104.101.99.107.95.110.103.105.110.120 = STRING: "6" UCD-SNMP-MIB::ucdavis.5000.3.1.2.11.99.104.101.99.107.95.110.103.105.110.120 = STRING: "6" UCD-SNMP-MIB::ucdavis.5000.3.1.3.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 1 UCD-SNMP-MIB::ucdavis.5000.3.1.4.11.99.104.101.99.107.95.110.103.105.110.120 = INTEGER: 0 UCD-SNMP-MIB::ucdavis.5000.4.1.2.11.99.104.101.99.107.95.110.103.105.110.120.1 = STRING: "6"

创建snmp item

查看数据：