We provide the means for the collection, organization and computerized retrieval of knowledgeand Lightweight Data Forwarder for Linux, BSD, macOS and Windows.

September 5, 2023


NOTE: This is a minor hotfix release that covers for corner cases for metrics handling. We keep same release notes as part of v2

Release Notes v2.1.9

Fluent Bit is a Fast and Lightweight Data Processor and Forwarder for Linux, BSD and OSX. We are proud to announce the availability of Fluent Bit v2.1.9.


Fluent Bit v2.1 is the start of the new stable series of the project. During the last months our primary focus has been around extending support for Metrics, Traces and improving performance, among many others.

  • Core

    • io: added code to detect non-recoverable connection errors
    • tls: openssl: added code to propagate syscall errors
    • config_format: Yaml
      • support idiomatic Yaml (camelCase)
      • use a stack based parser
    • utils: use ferror and not math to check file handler for error.
    • utils: suppress errno when file is empty but readable.
    • utils: check existence of machine-id files before reading them. (#7806)
    • emitter_create: exit and destroy instance on fail
    • lua: pass index to lua_arraylength
    • input: apply back pressure if input threaded plugin is paused (#7847)
    • input: send resume signal to the input thread event loop if plugin is threaded
    • config: throw an error if a configuration property is not applied.
    • core: Expand pthread stack size on macOS
    • aws: Allocate S3_KEY_SIZE +1 instead of S3_KEY_SIZE for allocating buffer for s3 key
    • upstream: added code to discard failed connections
  • Libs

    • c-ares: upgrade to v1.19.1
  • Plugins


On every release, there are many people involved doing contributions on different areas like bug reporting, troubleshooting, documentation and coding, without these contributions from the community, the project won’t be the same and won’t be in the good shape that it is now. So THANK YOU! to everyone who takes part of this journey!

Join us

We want to hear about you, our community is growing and you can be part of it!, you can contact us at:

Latest Version

New release on June 11, 2024

Fluent Bit v3.0.7 is out!

Check out the Release Notes, read the Updated Documentation or jump directly to the Downloads Section.

We are part of a wide community, no vendor lock-in.