Fluent Bit core and plug-ins are licensed under the terms of the Apache License v2. It's open and business friendly.
Originally made for Embedded Linux systems, it aims to keep a small footprint. Optimized for low memory and CPU usage.
By default it provides built-in metrics interface to measure CPU usage and trace the Linux Kernel log buffer.
Engineered for Embedded Linux with a strong focus on OpenEmbedded and Yocto Project.
All features such as built-in metrics and I/O plugins, are optional at build time. The core can be extended through a simple registration API
.Despite being lightweight, FluentBit design consider high performance a critical piece in data collection, for hence the serialization of data is performed using MessagePack, a binary representation of JSON.