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Fluent Bit is a fast Log Processor and Forwarder for Linux, Windows, Embedded Linux, MacOS and BSD family operating systems. It's part of the GraduatedFluentd Ecosystem and aCNCF sub-project.

Fluent Bit allows to collect log events or metrics from different sources, process them and deliver them to different backends such asFluentd, Elasticsearch, Splunk, DataDog, Kafka, New Relic, Azure services, AWS services, Google services, NATS, InfluxDB or any custom HTTP end-point.

Fluent Bit comes with full SQLStream Processing capabilities: data manipulation and analytics using SQL queries.

Fluent Bit runs on x86_64, x86, arm32v7, and arm64v8 architectures.

• High Performance at low CPU and Memory footprint
• Data Parsing
  • Convert your unstructured messages using our parsers:JSON,Regex,LTSV andLogfmt
• 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 andExtensibility: Inputs, Filters and Outputs
  • More than 70 built-in plugins available
  • Extensibility
    • Write any input, filter or output plugin in C language
    • WriteFilters in Lua orOutput plugins in Golang
• Monitoring: expose internal metrics over HTTP in JSON andPrometheus 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 is used widely in production environments. As of 2022,Fluent Bit surpasses 3 Billion downloads and continues to be deployed over10 million times a day. The following is a preview of who uses Fluent Bit heavily in production:

If your company uses Fluent Bit and is not listed, feel free to open a GitHub issue and we will add the logo.

Our official project documentation forinstallation,configuration, deployment and development topics is located here:

• https://docs.fluentbit.io

If you aim to build Fluent Bit from sources, you can go ahead and start with the following commands.

cd buildcmake ..makebin/fluent-bit -i cpu -o stdout -f 1

If you are interested into more details, please refer to theBuild & Install section.

• CMake >= 3.0
• Flex
• Bison
• YAML library/headers
• OpenSSL library/headers

We provide packages for most common Linux distributions:

• Debian
• Raspbian
• Ubuntu
• CentOS

Our Linux containers images are the most common deployment model, thousands ofnew installation happen every day, learn more about the available images andtagshere.

Fluent Bit is fully supported on Windows environments, get started withthese instructions.

Fluent Bit runs on Linux on IBM Z(s390x), but the WASM filter plugin is not. For the LUA filter plugin, it runs whenlibluajit is installed on the system and fluent bit is built withFLB_LUAJIT andFLB_PREFER_SYSTEM_LIB_LUAJIT on.

Fluent Bit is based in a pluggable architecture where different plugins plays a major role in the data pipeline:

Fluent Bit is an open project, several individuals and companies contribute in different forms like coding, documenting, testing, spreading the word at events within others. If you want to learn more about contributing opportunities please reach out to us through ourCommunity Channels.

If you are interested in contributing to Fluent bit with bug fixes, new features or coding in general, please refer to the codeCONTRIBUTING guidelines. You can also refer the Beginners Guide to contributing to Fluent Bithere.

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

• Slack (#fluent-bit channel)
• Twitter

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

Fluent Bit is sponsored and maintained by several companies in the Cloud Native community, including all the major cloud providers.

You can see a list of contributorshere.