Monitoring custom attributes via SNMP

There comes a time in every network admin’s career when management/developers/dbas need to monitor some obscure attribute on a particular server. Invariably, there is no pre-existing plugin in nagios to monitor this attribute. The solution of course is to write your own plugin to monitor this attribute. There are at least a couple of ways … Continue reading Monitoring custom attributes via SNMP

Monitoring Tomcat via JMX–Lessons Learned: Part 2

In my previous post I mentioned that the check_jmx plugin I've used for monitoring JMX does not output perfdata data, which is useful for programs such as Centreon and Nagios which use this data to graph the output of the plugin. The developers have made an excellent job with this plugin, and I hope they … Continue reading Monitoring Tomcat via JMX–Lessons Learned: Part 2

Monitoring Tomcat via JMX–Lessons Learned: Part 1

Requirement : monitoring vital Tomcat statistics such as active & idle threads, memory consumption and so on. JMX (java monitoring extensions) is quite well documented – so a google search should bring you up to speed, but in a nutshell, JMX is almost like a java-centric SNMP. Java app developers can make certain attributes such … Continue reading Monitoring Tomcat via JMX–Lessons Learned: Part 1