Fluent Bit documentation

Fluent Bit is a fast and lightweight telemetry agent for logs, metrics, and traces for Linux, macOS, Windows, and BSD family operating systems. Fluent Bit has been made with a strong focus on performance to allow the collection and processing of telemetry data from different sources without complexity.

Features

• High performance: High throughput with low resources consumption

• Data parsing

  • Convert your unstructured messages using Fluent Bit parsers: , , and

• Metrics support: Prometheus and OpenTelemetry compatible

• Reliability and data integrity

  • handling

  • in memory and file system

• Networking

  • Security: Built-in TLS/SSL support

  • Asynchronous I/O

• Pluggable architecture and : Inputs, Filters and Outputs:

  • Connect nearly any source to nearly any destination using preexisting plugins

  • Extensibility:

• : Expose internal metrics over HTTP in JSON and format

• : Perform data selection and transformation using basic SQL queries

  • Create new streams of data using query results

  • Aggregation windows

• Portable: Runs on Linux, macOS, Windows and BSD systems

For more details about changes in each release, refer to the .

If you are upgrading from the Fluent Bit 4.2 series, start with and .

Fluent Bit is a graduated sub-project under the umbrella of .

Fluent Bit was originally created by and is now sponsored by . As a CNCF-hosted project, it's a fully vendor-neutral and community-driven project.

Fluent Bit, including its core, plugins, and tools, is distributed under the terms of the .