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67 lines
3 KiB
Text
67 lines
3 KiB
Text
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-------- JMX plugin for Munin ---------
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Java JMX Munin plugin enables you to monitor JMX attributes in Munin.
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As soon as JMX embedded in Java 5, any Java process may expose parameters to be monitored using JMX interface,
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look http://java.sun.com/j2se/1.5.0/docs/guide/management/agent.html and http://java.sun.com/jmx for details
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In Java version < 5 it is still possible to expose JMX interface using third party libraries
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To see what can be monitored by JMX, run <JDK>/bin/jconsole.exe and connect to
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the host/port you setup in your Java process.
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Some examples are:
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* standard Java JMX implementation exposes memory, threads, OS, garbage collector parameters
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* Tomcat exposes multiple parameters - requests, processing time, threads, etc..
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* spring framework allows to expose Java beans parameters to JMX
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* your application may expose any attributes for JMX by declaration or explicitly.
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* can monitor localhost or remote processes
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-------- Installation ---------
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Pre-requsisites are:
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- installed munin-node
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- Java version 5 JRE
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1) Files from "plugin" folder must be copied to /usr/share/munin/plugins (or another - where your munin plugins located)
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2) Make sure that jmx_ executable : chmod a+x /usr/share/munin/plugins/jmx_
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3) Copy configuration files that you want to use, from "examples" folder, into /usr/share/munin/plugins folder
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4) create links from the /etc/munin/plugins folder to the /usr/share/munin/plugins/jmx_
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The name of the link must follow wildcard pattern:
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jmx_<configname>,
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where configname is the name of the configuration (config filename without extension), for example:
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ln -s /usr/share/munin/plugins/jmx_ /etc/munin/plugins/jmx_process_memory
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5) optionally specify the environment variable for JMX URL. The default URL corresponds to localhost:1616.
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If you have different port listening by JMX or different hostname to monitor, specify jmxurl parameter
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in /etc/munin/plugin-conf.d/munin-node:
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[jmx_*]
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env.jmxurl service:jmx:rmi:///jndi/rmi://localhost:1616/jmxrmi
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-------- Check Installation ---------
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To check that all installed properly, try invoke plugins from command line, using links like:
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root@re:/etc/munin/plugins# ./jmx_java_process_memory config
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graph_category Java
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...
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root@re:/etc/munin/plugins# ./jmx_java_process_memory
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java_memory_nonheap_committed.value 35291136
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...
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If you have configured environment for jmxurl, do not forget to export it before!
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-------- Configuration Files ---------
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Folder "examples" contains configuration files for Java and Tomcat monitoring examples.
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The format of configuration file is a superset of Munin plugin "config" command output
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(http://munin.projects.linpro.no/wiki/protocol-config)
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It has the following additions:
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<fieldname>.jmxObjectName JMX object name, e.g. java.lang:type=Memory
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<fieldname>.jmxAttributeName JMX attribute name, e.g. NonHeapMemoryUsage
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<fieldname>.jmxAttributeKey If attribute is a composed data (structure), the name of the field in structure, e.g. max
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% separates comments in file
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