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View Code? Open in Web Editor NEWMunin plugins for Varnish.
Munin plugins for Varnish.
============= munin.varnish ============= Introduction ============ A buildout recipe that packages and configures the munin tool *varnish_* to enable monitoring of Varnish. Contains a modified version of *varnish_* `r4439 <http://varnish-cache.org/browser/trunk/varnish-tools/munin/varnish_?rev=4439>`__ created by Kristian Lyngstol which works with Varnish 2.0 or newer. How to use it ============= You can use it with a part like this:: [buildout] parts = ... munin-varnish [munin-varnish] recipe = munin-varnish varnishstat = ${varnish-build:location}/bin/varnishstat Where ``varnish-build`` would be a typical cmmi part that builds Varnish. And the ``varnishstat`` option is the full path to the *varnishstat* binary. This part will create a script in the buildout bin directory called *munin-varnish* which is used to monitor all the different aspects. The current list of aspects available for monitoring is (``bin/munin-varnish suggest``):: expunge transfer_rates objects uptime request_rate memory_usage hit_rate threads backend_traffic Each of these need to be installed as symlinks into the munin-node plugins. For example:: cd /etc/munin/plugins ln -s /path/to/buildout/bin/munin-varnish varnish_expunge Monitoring multiple instances ----------------------------- You can use the optional parameter `name` to add a name to the graph titles:: [munin-varnish] recipe = munin-varnish varnishstat = ${varnish-build:location}/bin/varnishstat name = Project X In the above Example calling ``graph_title Object expunging`` would become ``graph_title Object expunging - Project X``. To monitor multiple instances you need to be able to put different symlinks into your ``etc/munin/plugins/`` directory. You can use double underscore in the symlink installation to separate the instance name from the aspect. The above installation example would become:: cd /etc/munin/plugins ln -s /path/to/buildout/bin/munin-varnish varnish_projectX__expunge (**ATTENTION**: note the double underscore!). We are using a slightly modified version of *varnish_* to support multiple instances. See this `post on varnish-dev <http://lists.varnish-cache.org/pipermail/varnish-dev/2009-December/002347.html>`__ for more information. Notes ===== * A build of *varnishstat* requires the developer's libraries for ncurses. If you don't have a *varnishstat* in your build of Varnish then most likely you need to install the ncurses-devel or libncurses5-dev package and then get buildout to rebuild Varnish. * The hit_rate aspect only works correctly with a munin server running version 1.4.0 alpha or better. However hit rate data is also available in request_rate where it is presented as raw rates rather than normalized as a percentage. Credits ======= Michael Dunstan, Author Harald Friessnegger, added support for multiple instances
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