Fluentd

Fluentd is an event collector system. It is a generalized version of syslogd, which handles JSON objects for its log messages.

Architecture

Fluentd collects events from various data sources and writes them to files, database or other types of storages:

Web apps  ---+                 +--> file
             |                 |
             +-->           ---+
/var/log  ------>  Fluentd  ------> mail
             +-->           ---+
             |                 |
Apache    ----                 +--> Fluentd

Fluent also supports log transfer:

Web server
+---------+
| Fluentd -------
+---------+|     |
 +---------+     |
                 |
Proxy server     |    Log server, Amazon S3, HDFS, ...
+---------+      +--> +---------+
| Fluentd ----------> | Fluentd ||
+---------+|     +--> +---------+|
 +---------+     |     +---------+
                 |
Database server  |
+---------+      |
| Fluentd ---------> mail
+---------+|
 +---------+

An event consists of tag, time and record. Tag is a string separated with ‘.’ (e.g. myapp.access). It is used to categorize events. Time is a UNIX time recorded at occurrence of an event. Record is a JSON object.

Quick Start

$ gem install fluentd
$ # install sample configuration file to the directory
$ fluentd -s conf
$ fluentd -c conf/fluent.conf &
$ echo '{"json":"message"}' | fluent-cat debug.test

Meta

Web site

fluentd.org/

Documents

docs.fluentd.org/

Source repository

github.com/fluent

Discussion

groups.google.com/group/fluentd

Author

Sadayuki Furuhashi

Copyright

© 2011 FURUHASHI Sadayuki

License

Apache License, Version 2.0

Contributors:

Patches contributed by those people.