redturtle.munin 1.0a1

Munin plugins for Zope/Plone.

Introduction

This package provides munin plugins for monitoring various aspects of a Zope instance.

It uses gocept.munin for plugin registration. Please refer to its documentation if you want to write new plugins.

Bits of the code is based on plugins found at munin exchange (many thanks to Gaute Amundsen and Arthur Lutz).

Plugins

Currently there are 4 plugins available:

• “zopethreads” - reports free Zope threads

• “zopecache” - reports database cache parameters

• “zodbactivity” - reports ZODB activity

• “zopememory” - reports Zope memory usage (only works on Linux)

How to use it

• First include the package in your buildout instance slot:

  [instance]
  ...
  eggs =
      ...
      redturtle.munin
  zcml =
      ...
      redturtle.munin

• To create the pluging helper script you’ll also need to include the following, additional section and extend your parts definition:

  [buildout]
  parts =
      ...
      munin
  
  [munin]
  recipe = zc.recipe.egg
  eggs = redturtle.munin
  arguments = http_address='${instance:http-address}', user='${instance:user}'

  The arguments option is used to pass configuration values to the generated helper script, which is then used as the actual munin plugin (see below). Any settings for ip-address, http-address, port-base and user given in the instance section should be repeated here, separated by commas.

  Please be aware, that the variable names use underscores instead of dashes here — the following list shows all supported settings and their respective default values:

  • ip_address=’<ip-address>’ [‘localhost’]

  • http_address=<http-address> [8080]

  • port_base=<port-base> [0]

  • user=<user-credentials> [n.a.]

  Either literal values or references to the instance part can be used here, i.e. “http_address=’${instance:http-address}’, user=’${instance:user}’”. Please note that the resulting line will be verbosely copied into the generated bin/munin script, so the extra quoting is required.

• Now you should be able to call the plugins as follow:

  http://localhost:8080/@@redturtle.munin.plugins/zopethreads

  Where zopethreads is you plugin name. Please note that for security reasons the view requires the View management screens permission.

• Next you need to make symlinks from the helper script inside your buildout’s bin/ to the munin plugin directory. The helper script itself can assist you with this:

  $ bin/munin install /opt/munin/etc/plugins

  This will install the necessary symlinks in the given directory and use the hostname and current directory to assemble their names (see below).

  Alternatively, you may also install the desired symlinks yourself:

  $ cd /opt/munin/etc/plugins
  $ ln -s ~/zope/bin/munin company_zodbactivity_site1

  Here /opt/munin/etc/plugins is your munin directory, ~/zope/ is the root directory of your buildout, zodb_activity the name of the plugin you want to enable, company a placeholder for an arbitrary prefix and site1 the name which will be shown in munin.

• Finally configure the plugin in munin (this step can be skipped if you have correctly set up the arguments option as described in step 2 above):

  $ cd /opt/munin/etc/plugin-conf.d/
  $ vi redturtle.conf
  ... [company_*_site1]
  ... env.AUTH myuser:myuser
  ... env.URL http://localhost:8080/@@redturtle.munin.plugins/%s

  Here myuser:myuser are your Zope user credentials and localhost:8080 your site url. Please check munin for more information about plugin configuration.

References

• redturtle.munin at pypi

• gocept.munin at pypi

• munin project

• munin exchange

Contact

• Andrew Mleczko <andrew.mleczko at redturtle.net>

  RedTurtle Technology, http://www.redturtle.net/
• Andreas Zeidler <az at zitc.de>

  ZITC, http://zitc.de/

Changelog

1.0a1 - 2009/07/17

• Add script option to automatically setup symlinks for all available plugins in the munin plugin directory. [witsch]

• Add plugin to track zope’s memory usage (only available on Linux). [witsch]

• Add logging of slow plugin execution as a safety net. [witsch]

• Allow setting of necessary configuration values directly in buildout. [witsch]

• Refactor and try to simplify things. [witsch]

0.0.3 - 2009/03/30

• Add documentation. [amleczko]

• Refactor plugin registration. [amleczko]

0.0.2 - 2009/03/26

• Small refactoring. [amleczko]

0.0.1 - 2009/03/24

• Initial release. [amleczko]