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[Fluent Bit](https://fluentbit.io) is a lightweight and high-performance Telemetry Agent designed to collect, process, and forward **Logs**, **Metrics**, and **Traces** from any source to any destination.
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[Fluent Bit](http://fluentbit.io) is a fast Log, Metrics and Traces Processor and Forwarder for Linux, Windows, Embedded Linux, MacOS and BSD family operating systems. It's part of the Graduated [Fluentd](http://fluentd.org) Ecosystem and a [CNCF](https://cncf.io)sub-project.
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It's part of the Graduated [Fluentd](https://fluentd.org) Ecosystem and a CNCF[Cloud Native Computing Foundation](https://cncf.io) project.
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Fluent Bit allows to collect different signal types such as logs, metrics and traces from different sources, process them and deliver them to different backends such as [Fluentd](http://fluentd.org), Elasticsearch, Splunk, DataDog, Kafka, New Relic, Azure services, AWS services, Google services, NATS, InfluxDB or any custom HTTP end-point.
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Fluent Bit supports a wide array of platforms, including Linux, Windows, MacOS, BSD, and Embedded environments, and is built for maximum efficiency with minimal CPU and memory footprint.
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Fluent Bit comes with full SQL [Stream Processing](https://docs.fluentbit.io/manual/stream-processing/introduction) capabilities: data manipulation and analytics using SQL queries.
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Fluent Bit runs on x86_64, x86, arm32v7, and arm64v8 architectures.
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---
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## Features
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## 📌 Roadmap & Maintenance
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- High Performance at low CPU and Memory footprint
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- Data Parsing
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- Convert your unstructured messages using our parsers: [JSON](https://docs.fluentbit.io/manual/pipeline/parsers/json), [Regex](https://docs.fluentbit.io/manual/pipeline/parsers/regular-expression), [LTSV](https://docs.fluentbit.io/manual/pipeline/parsers/ltsv) and [Logfmt](https://docs.fluentbit.io/manual/pipeline/parsers/logfmt)
-[Data Buffering](https://docs.fluentbit.io/manual/administration/buffering-and-storage) in memory and file system
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- Networking
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- Security: built-in TLS/SSL support
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- Asynchronous I/O
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- Pluggable Architecture and [Extensibility](https://docs.fluentbit.io/manual/development): Inputs, Filters and Outputs
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- More than 70 built-in plugins available
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- Extensibility
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- Write any input, filter or output plugin in C language
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- Write [Filters in Lua](https://docs.fluentbit.io/manual/filter/lua) or [Output plugins in Golang](https://docs.fluentbit.io/manual/development/golang-output-plugins)
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-[Monitoring](https://docs.fluentbit.io/manual/administration/monitoring): expose internal metrics over HTTP in JSON and [Prometheus](https://prometheus.io/) format
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-[Stream Processing](https://docs.fluentbit.io/manual/stream-processing/introduction): Perform data selection and transformation using simple SQL queries
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- Create new streams of data using query results
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- Aggregation Windows
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- Data analysis and prediction: Timeseries forecasting
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- Portable: runs on Linux, MacOS, Windows and BSD systems
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We follow a fast-paced development cycle, with major releases every 3–4 months.
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The active development branch (`master`) is currently focused on **v4.1**.
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## Fluent Bit in Production
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For version-specific maintenance timelines and policies, see our [MAINTENANCE.md](https://github.com/fluent/fluent-bit/blob/master/MAINTENANCE.md).
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Fluent Bit is a widely adopted solution in production environments. As of 2024, Fluent Bit has surpassed 15 billion downloads and continues to be deployed over 10 million times daily. Below is a preview of some of the organizations that rely heavily on Fluent Bit in their production systems:
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To track upcoming milestones, visit the [project roadmap](https://github.com/fluent/fluent-bit/wiki/Roadmap).
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> If your company uses Fluent Bit and is not listed, feel free to open a GitHub issue and we will add the logo.
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---
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## Key Features
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## [Documentation](https://docs.fluentbit.io)
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- ⚡ **High Performance** with low memory footprint
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- 📦 **Pluggable Architecture**: 70+ built-in plugins for Inputs, Filters, and Outputs
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- 🧠 **SQL Stream Processing**: Perform analytics and transformations with SQL queries
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- 🔒 **Secure Networking**: Built-in TLS/SSL support and async I/O
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- 📊 **Monitoring**: Expose internal metrics over HTTP/Prometheus
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- 🧩 **Extensibility**:
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- Write plugins in **C**, filters in **Lua**, and outputs in **Go**
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- 🔌 **Supports Logs, Metrics, and Traces** with unified processing and delivery
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Our official project documentation for [installation](https://docs.fluentbit.io/manual/installation), [configuration](https://docs.fluentbit.io/manual/administration/configuring-fluent-bit), deployment and development topics is located here:
If you aim to build Fluent Bit from sources, you can go ahead and start with the following commands.
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---
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## Quick Start
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Build from source:
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```bash
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cd build
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bin/fluent-bit -i cpu -o stdout -f 1
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```
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If you are interested into more details, please refer to the [Build & Install](https://docs.fluentbit.io/manual/installation/sources/build-and-install) section.
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More details: [Build & Install](https://docs.fluentbit.io/manual/installation/sources/build-and-install)
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#### Requirements
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- CMake >= 3.0
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- Flex
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- Bison
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- YAML library/headers
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- OpenSSL library/headers
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#### Linux Packages
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We provide packages for most common Linux distributions:
Fluent Bit is fully supported on Windows environments, get started with [these instructions](https://docs.fluentbit.io/manual/installation/windows).
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#### Running on s390x
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Fluent Bit runs on Linux on IBM Z(s390x), but the WASM filter plugin is not. For the LUA filter plugin, it runs when `libluajit` is installed on the system and fluent bit is built with `FLB_LUAJIT` and `FLB_PREFER_SYSTEM_LIB_LUAJIT` on.
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### Plugins: Inputs, Filters and Outputs
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[Fluent Bit](http://fluentbit.io) is based in a pluggable architecture where different plugins plays a major role in the data pipeline:
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#### Input Plugins
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| name | title | description |
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| :--- | :--- | :--- |
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|[collectd](https://docs.fluentbit.io/manual/pipeline/inputs/collectd)| Collectd | Listen for UDP packets from Collectd. |
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|[cpu](https://docs.fluentbit.io/manual/pipeline/inputs/cpu-metrics)| CPU Usage | measure total CPU usage of the system. |
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|[disk](https://docs.fluentbit.io/manual/pipeline/inputs/disk-io-metrics)| Disk Usage | measure Disk I/Os. |
|[s3](https://docs.fluentbit.io/manual/pipeline/outputs/s3)| S3 | Flush records to s3 |
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|[stackdriver](https://docs.fluentbit.io/manual/pipeline/outputs/stackdriver)| Google Stackdriver Logging | Flush records to Google Stackdriver Logging service. |
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|[stdout](https://docs.fluentbit.io/manual/pipeline/outputs/standard-output)| Standard Output | Flush records to the standard output. |
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|[splunk](https://docs.fluentbit.io/manual/pipeline/outputs/splunk)| Splunk | Flush records to a Splunk Enterprise service |
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|[tcp](https://docs.fluentbit.io/manual/pipeline/outputs/tcp-and-tls)| TCP & TLS | Flush records to a TCP server. |
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|[td](https://docs.fluentbit.io/manual/pipeline/outputs/treasure-data)|[Treasure Data](http://www.treasuredata.com)| Flush records to the [Treasure Data](http://www.treasuredata.com) cloud service for analytics. |
-[Filter Plugins](https://docs.fluentbit.io/manual/pipeline/filters): enrich and transform data
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-[Output Plugins](https://docs.fluentbit.io/manual/pipeline/outputs): deliver data to external services
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See the full plugin list in our [documentation](https://docs.fluentbit.io/manual/pipeline/inputs).
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---
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## 🚀 Production Usage
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Fluent Bit is deployed **over 10 million times daily** and has surpassed **15 billion downloads**.
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Used by companies like:
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> Want to add your logo? [Open an issue](https://github.com/fluent/fluent-bit/issues).
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---
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## Contributing
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[Fluent Bit](https://fluentbit.io) 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 our [Community Channels](https://fluentbit.io/community/).
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Fluent Bit is open to community contributions!
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If you are interested in contributing to Fluent bit with bug fixes, new features or coding in general, please refer to the code [CONTRIBUTING](CONTRIBUTING.md) guidelines. You can also refer the Beginners Guide to contributing to Fluent Bit [here.](DEVELOPER_GUIDE.md)
[Fluent Bit](http://fluentbit.io) is sponsored and maintained by several companies in the Cloud Native community, including all the major cloud providers.
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## Authors
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You can see a list of contributors [here](https://github.com/fluent/fluent-bit/graphs/contributors).
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Fluent Bit is a CNCF sub-project, sponsored and maintained by major cloud providers and a growing community of contributors and maintainers from across the Cloud Native ecosystem.
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