Fluent Bit v1.5 Documentation

High Performance Logs Processor

Fluent Bit is a Fast and Lightweight Log Processor, Stream Processor and Forwarder for Linux, OSX, Windows and BSD family operating systems. It has been made with a strong focus on performance to allow the collection of events from different sources without complexity.


  • High Performance

  • Data Parsing

  • Reliability and Data Integrity

  • Networking

    • Security: built-in TLS/SSL support

    • Asynchronous I/O

  • Pluggable Architecture and Extensibility: Inputs, Filters and Outputs

  • Monitoring: expose internal metrics over HTTP in JSON and Prometheus format

  • Stream Processing: Perform data selection and transformation using simple SQL queries

    • Create new streams of data using query results

    • Aggregation Windows

    • Data analysis and prediction: Timeseries forecasting

  • Portable: runs on Linux, MacOS, Windows and BSD systems

Fluent Bit, Fluentd and CNCF

Fluent Bit is a sub-component of the Fluentd project ecosystem, it's licensed under the terms of the Apache License v2.0. This project was created by Treasure Data and is its current primary sponsor.

Nowadays Fluent Bit get contributions from several companies and individuals and same as Fluentd, it's hosted as a CNCF subproject.

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