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tahoe-lafs/misc/munin/tahoe-stats.plugin-conf

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stats: add a simple stats gathering system We have a desire to collect runtime statistics from multiple nodes primarily for server monitoring purposes. This implements a simple implementation of such a system, as a skeleton to build more sophistication upon. Each client now looks for a 'stats_gatherer.furl' config file. If it has been configured to use a stats gatherer, then it instantiates internally a StatsProvider. This is a central place for code which wishes to offer stats up for monitoring to report them to, either by calling stats_provider.count('stat.name', value) to increment a counter, or by registering a class as a stats producer with sp.register_producer(obj). The StatsProvider connects to the StatsGatherer server and provides its provider upon startup. The StatsGatherer is then responsible for polling the attached providers periodically to retrieve the data provided. The provider queries each registered producer when the gatherer queries the provider. Both the internal 'counters' and the queried 'stats' are then reported to the gatherer. This provides a simple gatherer app, (c.f. make stats-gatherer-run) which prints its furl and listens for incoming connections. Once a minute, the gatherer polls all connected providers, and writes the retrieved data into a pickle file. Also included is a munin plugin which knows how to read the gatherer's stats.pickle and output data munin can interpret. this plugin, tahoe-stats.py can be symlinked as multiple different names within munin's 'plugins' directory, and inspects argv to determine which data to display, doing a lookup in a table within that file. It looks in the environment for 'statsfile' to determine the path to the gatherer's stats.pickle. An example plugins-conf.d file is provided.
2008-01-31 03:11:07 +00:00
[tahoe_storage_allocated]
env.statsfile /home/robk/trees/tahoe/stats_gatherer/stats.pickle
[tahoe_storage_consumed]
env.statsfile /home/robk/trees/tahoe/stats_gatherer/stats.pickle
[tahoe_runtime_load_avg]
env.statsfile /home/robk/trees/tahoe/stats_gatherer/stats.pickle
[tahoe_runtime_load_peak]
env.statsfile /home/robk/trees/tahoe/stats_gatherer/stats.pickle
[tahoe_storage_bytes_added]
env.statsfile /home/robk/trees/tahoe/stats_gatherer/stats.pickle
[tahoe_storage_bytes_freed]
env.statsfile /home/robk/trees/tahoe/stats_gatherer/stats.pickle
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