fluent-bit
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Description:
Fast and Lightweight Logs and Metrics processor
Type: Formula  |  Latest Version: 4.2.1@0  |  Tracked Since: Dec 18, 2025
Links: Homepage  |  GitHub  |  Docs  |  @fluentbit  |  formulae.brew.sh
Stars: 7,525  |  Forks: 1,847  |  Language: C  |  Category: Devops
Tags: logging metrics observability devops kubernetes
Install: brew install fluent-bit
About:
Fluent Bit is a high-performance, open-source log processor and forwarder designed for cloud-native environments. It collects, parses, filters, and forwards logs and metrics from various sources to multiple destinations like Elasticsearch, Datadog, and Kafka. Its primary value is providing a lightweight, efficient data pipeline agent with a minimal memory footprint.
Key Features:
  • High-performance log processing and forwarding
  • Extensible plugin architecture for inputs, filters, and outputs
  • Built-in metrics and health monitoring
  • Low memory footprint and CPU usage
  • Native support for Kubernetes and Docker
Use Cases:
  • Centralized logging and monitoring in Kubernetes clusters
  • Streaming application log data to analytics backends
  • Building lightweight data pipelines for IoT and edge computing
Alternatives:
  • fluentd – Fluent Bit is a lighter-weight, more performant subset of Fluentd, designed as a forwarder/agent.
  • Logstash – Fluent Bit is generally more resource-efficient, while Logstash offers a broader set of built-in plugins.
  • Vector – Both are high-performance data pipelines; Vector is written in Rust and emphasizes reliability and observability.
Version History
Detected Version Rev Change Commit
Dec 24, 2025 5:03am 4.2.1 0 VERSION_BUMP 9c20bcd1
Dec 18, 2025 5:02am 4.2.0 0 VERSION_BUMP c6977cfd
Nov 12, 2025 2:31am 0 VERSION_BUMP 57f25e35
Oct 9, 2025 2:05pm 0 VERSION_BUMP 7614f5c9
Sep 24, 2025 10:57pm 0 VERSION_BUMP 9965759f
Sep 18, 2025 11:35am 0 VERSION_BUMP 34943426
Sep 18, 2025 10:58am 0 VERSION_BUMP ba370b4b
Sep 14, 2025 7:55pm 0 VERSION_BUMP 2a449dd8
Dec 31, 2024 4:54am 0 VERSION_BUMP 3e4cb4de
Nov 18, 2024 3:35pm 0 VERSION_BUMP 1f318ba0
Sep 17, 2024 2:47am 0 VERSION_BUMP ade4ca73