Simple daemon for easy stats aggregation

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Patrick Scharrenberg 845c129a9f create log directory on startup as statsd does not start without it		2014-03-21 11:43:04 +01:00
backends	Enhancement: consume logger in graphite and repeater backends	2013-12-07 00:12:22 +01:00
bin	add bin/statsd	2012-06-28 16:07:37 +02:00
debian	create log directory on startup as statsd does not start without it	2014-03-21 11:43:04 +01:00
docs	fixed a link	2013-12-31 13:51:12 +01:00
examples	Julia statsd client implementation	2014-02-26 12:03:17 -08:00
lib	lib/helpers: added support for null 'ms' metrics.	2014-02-22 22:54:32 -08:00
test	tests: improved tests for lib/helpers	2014-02-22 22:54:32 -08:00
utils	clearer sample graphite url	2013-02-19 19:02:37 -05:00
.gitignore	Be more nodeish... package.json and gitignore	2012-02-15 16:22:24 -05:00
.travis.yml	use travis ci to deploy npm packages from tags	2013-12-05 16:40:43 -05:00
CONTRIBUTING.md	move contributing information into CONTRIBUTING.md	2014-01-29 14:07:16 +01:00
Changelog.md	bump to v0.7.1	2014-02-06 11:36:34 +01:00
LICENSE	adding license (mit)	2010-12-29 19:50:11 -05:00
README.md	move contributing information into CONTRIBUTING.md	2014-01-29 14:07:16 +01:00
exampleConfig.js	Clarify use of backends with example	2014-03-12 09:03:44 -04:00
exampleProxyConfig.js	Update to use config library, make cacheSize a config option, and switch to using the health status	2013-04-10 18:54:08 +00:00
package.json	bump to v0.7.1	2014-02-06 11:36:34 +01:00
proxy.js	Performance tweaks to proxy	2013-12-06 08:56:40 -05:00
run_tests.sh	Make failing tests exit with non-zero status	2012-07-20 22:17:08 -07:00
stats.js	Enhancement: inject logger object into backend	2013-11-28 18:01:16 +01:00

README.md

StatsD

A network daemon that runs on the Node.js platform and listens for statistics, like counters and timers, sent over UDP and sends aggregates to one or more pluggable backend services (e.g., Graphite).

We (Etsy) blogged about how it works and why we created it.

Inspiration

StatsD was inspired (heavily) by the project (of the same name) at Flickr. Here's a post where Cal Henderson described it in depth: Counting and timing Cal re-released the code recently: Perl StatsD

Key Concepts

buckets Each stat is in its own "bucket". They are not predefined anywhere. Buckets can be named anything that will translate to Graphite (periods make folders, etc)
values Each stat will have a value. How it is interpreted depends on modifiers. In general values should be integer.
flush After the flush interval timeout (defined by config.flushInterval, default 10 seconds), stats are aggregated and sent to an upstream backend service.

Installation and Configuration

Install node.js
Clone the project
Create a config file from exampleConfig.js and put it somewhere
Start the Daemon:

node stats.js /path/to/config

Debugging

There are additional config variables available for debugging:

debug - log exceptions and print out more diagnostic info
dumpMessages - print debug info on incoming messages

For more information, check the exampleConfig.js.

Tests

A test framework has been added using node-unit and some custom code to start and manipulate statsd. Please add tests under test/ for any new features or bug fixes encountered. Testing a live server can be tricky, attempts were made to eliminate race conditions but it may be possible to encounter a stuck state. If doing dev work, a killall statsd will kill any stray test servers in the background (don't do this on a production machine!).

Tests can be executed with ./run_tests.sh.