munin.zope

History

This package was originally started as redturtle.munin by RedTurtle Technology. From 1.1a1 we have move development to munin.zope leaving some free place for other munin plugins.

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 =
      ...
      munin.zope
  zcml =
      ...
      munin.zope

• If you use z3c.autoinclude and plone (default from Plone 3.3.x), you need only eggs stuff:

  [instance]
  ...
  eggs =
      ...
      munin.zope

• 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 = munin.zope
  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.

• When monitoring more than one Zope instance, i.e. in a ZEO setup, separate helper scripts need to be generated. In order to do so the scripts option of zc.recipe.egg can be used like so:

  [buildout]
  parts =
      ...
      munin1
      munin2
  
  [munin1]
  recipe = zc.recipe.egg
  eggs = munin.zope
  scripts = munin=munin1
  arguments = http_address='${instance1:http-address}', user='${instance1:user}'
  
  [munin2]
  recipe = zc.recipe.egg
  eggs = munin.zope
  scripts = munin=munin2
  arguments = http_address='${instance2:http-address}', user='${instance2:user}'

  The necessary symlinks can then be created with each of the scripts in turn (see below). Please note, that in this case you should explicitly provide at least a differing prefix argument.

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

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

  Where zopethreads is you plugin name.

• 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 [<prefix>] [<suffix>]

  This will install the necessary symlinks in the given directory using either the provided prefix and suffix or else 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 munin.zope.conf
  ... [company_*_site1]
  ... env.AUTH myuser:myuser
  ... env.URL http://localhost:8080/@@munin.zope.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.

Security

For security reasons the views requires the View management screens permission...

... or you can use a shared secret on the request, you must configure the shared key on zope.conf adding a stanza like:

<product-config munin.zope>
    secret yoursecrethere
</product-config>

On your buildout instance slot:

zope-conf-additional +=
    <product-config munin.zope>
        secret yoursecrethere
    </product-config>

So you can make a request without authentication, using the secret, like:

http://localhost:8080/@@munin.zope.plugins/zopethreads?secret=yoursecrethere

References

• munin.zope at pypi
• gocept.munin at pypi
• redturtle.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/
• Mauro Amico <mauro at biodec.com>
  Biodec, http://www.biodec.com/