Using munin plugins

Installing

The default plugin directory is /etc/munin/plugins/.

To install a plugin, place it in the plugin directory, and make it executable.

You can also place the plugin elsewhere, and install a symbolic link in the plugin directory. All the plugins provided with munin are installed in this way.

Configuring

The plugin configuration directory is /etc/munin/plugin-conf.d/. The syntax is:

user <username>

The user the plugin will run as.

Default: munin

group <groupname>

The group the plugin will run as

Default: munin

env.variablename <variable content>

Defines and exports an environment variable called “variablename” with the content set to <variable content>.

There is no need to quote the variable content.

Note

When configuring a munin plugin, add the least amount of extra privileges needed to run the plugin. For instance, do not run a plugin with “user root” to read syslogs, when it may be sufficient to set “group adm” instead.

Example:

[pluginname]
user             username
group            groupname
env.variablename some content for the variable
env.critical     92
env.warning      95

Plugin configuration is optional.

Testing

To test if the plugin works when executed by munin, you can use the munin-run command.

# munin-run myplugin config

# munin-run myplugin