Fluent Bit v1.9 Documentation

​Fluent Bit is a Fast and Lightweight Logs and Metrics 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.
Features
High Performance
Data Parsing
Convert your unstructured messages using our parsers: JSON, Regex, LTSV and Logfmt​
Metrics Collection (Prometheus compatible)
Reliability and Data Integrity
​Backpressure Handling
​Data Buffering in memory and file system
Networking
Security: built-in TLS/SSL support
Asynchronous I/O
Pluggable Architecture and Extensibility: Inputs, Filters and Outputs
More than 80 built-in plugins available
Extensibility
Write any input, filter or output plugin in C language
Bonus: write Filters in Lua or Output plugins in Golang​
​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 CNCF sub-project under the umbrella of Fluentd, it's licensed under the terms of the Apache License v2.0. This project was originally created by Treasure Data and is currently a vendor neutral and community driven project.

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What is Fluent Bit?

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Features

Fluent Bit, Fluentd and CNCF