Fluent Bit v4: A Decade of Innovation and What’s Next
Talkat KubeCon + CloudNativeCon Europe 2025 · on Friday, 2025-04-04· at 13:45· Platinum Suite | Level 3 | Room 3-4·
summary
Fluent Bit v4, released Monday, focuses on concrete wins: trace sampling adds probabilistic head sampling plus tail/table buffering to keep all failure traces while downsampling successes; conditional processing lets processors run per-input based on message content instead of tag-only routing; TLS now supports min/max versions and cipher controls; config files can load secrets and Lua from disk; Zig integration ships for output plugins with Rust/Go/WASM plugin paths planned; pipelines can run in parallel and Fluent Bit keeps its low-memory, Kubernetes-friendly footprint.
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chapters (7)
- 0:00Fluent Bit v4 intro
- 4:18Origins and purpose
- 7:52Vendor-agnostic architecture
- 11:28Deployment options
- 14:21New v4 features
- 23:24Future roadmap
- 26:02Q&A
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