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Fluent Bit is a Data Forwarder for Linux, Embedded Linux, OSX and BSD family operating systems. It's part of the Fluentd Ecosystem. Fluent Bit allows collection of information from different sources, buffering and dispatching them to different outputs such as Fluentd, Elasticsearch, Nats or any HTTP end-point within others. It's fully supported on x86_64, x86 and ARM architectures.

For more details about it capabilities and general features please visit the official documentation:

https://docs.fluentbit.io/

Quick Start

$ cd build
$ cmake ..
$ make
$ bin/fluent-bit -i cpu -o stdout

Features

Fluent Bit support the following features through plugins:

Input plugins

name	option	description
CPU	cpu	gather CPU usage between snapshots of one second. It support multiple cores
Disk	disk	usage of block device
Dummy	dummy	generates dummy event
Exec	exec	executes external program and collects event logs
Forward	forward	Fluentd forward protocol
Memory	mem	usage of system memory
MQTT	mqtt	start a MQTT server and receive publish messages
Netif	netif	usage of network interface
Kernel Ring Buffer	kmsg	read Linux Kernel messages, same behavior as the dmesg command line program
Syslog	syslog	read messages from a syslog daemon
Systemd/Journald	systemd	read messages from journald, part of the systemd suite
Serial Port	serial	read from serial port
Standard Input	stdin	read from the standard input
Head	head	read first part of files
Health	health	check health of TCP services
Process	proc	check health of Process
Random	random	generate random numbers
Tail	tail	tail log files
TCP	tcp	listen for raw JSON map messages over TCP

Filter Plugins

name	option	description
Record Modifier	record_modifier	Append/Remove key-value pair
Grep	grep	Match or exclude specific records by patterns
Nest	nest	Nest specific records by patterns
Kubernetes	kubernetes	Enrich logs with Kubernetes Metadata
Stdout	stdout	Print records to the standard output interface
Parser	parser	Parse records

Output Plugins

name	option	description
Counter	counter	count records
Elasticsearch	es	flush records to a Elasticsearch server
File	file	flush records to a file
FlowCounter	flowcounter	count records and its size
Forward	forward	flush records to a Fluentd service. On the Fluentd side, it requires an in_forward.
NATS	nats	flush records to a NATS server
HTTP	http	flush records to a HTTP end point
InfluxDB	influxdb	flush records to InfluxDB time series database
Plot	plot	generate a file for gnuplot
Standard Output	stdout	prints the records to the standard output stream
Treasure Data	td	flush records to Treasure Data service (cloud analytics)

Official Documentation

The official documentation of Fluent Bit can be found in the following site:

http://fluentbit.io/documentation/

Contributing

In order to contribute to the project please refer to the CONTRIBUTING guidelines.

Contact

Feel free to join us on our Slack channel, Mailing List or IRC:

• Slack: http://slack.fluentd.org (#fluent-bit channel)
• Mailing List: https://groups.google.com/forum/#!forum/fluent-bit
• IRC: irc.freenode.net #fluent-bit
• Twitter: http://twitter.com/fluentbit

License

This program is under the terms of the Apache License v2.0.

Authors

Fluent Bit is made and sponsored by Treasure Data among other contributors.