statsd
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statsd

Network daemon for the collection and aggregation of realtime application metrics

0.8.5  •  Published 3 months ago  •  by statsd  •  MIT License

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

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 integers.

  • 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

Docker

Statsd supports docker in two ways:

Manual installation

  • Install Node.js (All Current and LTS Node.js versions are supported.)
  • Clone the project
  • Create a config file from exampleConfig.js and put it somewhere
  • Start the Daemon: node stats.js /path/to/config

Usage

The basic line protocol expects metrics to be sent in the format:

<metricname>:<value>|<type>

So the simplest way to send in metrics from your command line if you have StatsD running with the default UDP server on localhost would be:

echo "foo:1|c" | nc -u -w0 127.0.0.1 8125

More Specific Topics

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.

History

statsd was originally written at (Etsy) and released with a blog post 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

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Popularity

Weekly Downloads
5.6K
Stars
14.2K

Maintenance

Development

Last ver 3 months ago
Created 8 years ago
Last commit 3 months ago
3 days between commits

Technology

Node version: 8.15.0
287.6K unpacked

Legal and Compliance

MIT License
OSI Approved
0 vulnerabilities

Contributors

217 contributors
Daniel Schauenberg
Maintainer, 220 commits, 185 merges, 5 PRs
Works at github
Steve Ivy
204 commits
Dan Rowe
104 commits, 36 merges, 36 PRs
Works at Wayfair
Erik Kastner
38 commits, 23 merges
Patrick Koch
29 commits, 19 merges, 1 PRs
Works at Etsy
Elliot Blackburn
Maintainer, 28 commits, 5 merges, 6 PRs
Works at justeat

Tags

statsd
etsy
metric
aggregation
realtime
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