v4.0.1

KNOWLEDGE BASE

Release Notes v4.0.1

Fluent Bit is a Fast and Lightweight Data Processor and Forwarder for Linux, BSD, Windows and macOS. We are proud to announce the availability of Fluent Bit v4.0.1.

What’s new ?

In v4.0 series, we have upgraded our internal dependencies and deprecated packages for older targets like Ubuntu 16.04, 18.04 and 20.04. In addition, due to Kafka library updates, we have disabled Kafka support for CentOS 7 and Amazon Linux 2.

Core

• input_chunk: fix missing initialization in routes_mask (#10223) (PR #10224)
• plugin_proxy: fixed memory leak (PR #10179)
• config_format
  • yaml: fix double-free from freeing state before cleanup on exit. (#10199) (PR #10199)
  • fix SEGV from missing return check (PR #10216)
• build
  • new FLB_KAFKA (default: on) option (PR #10195)
• tests
  • internal: fuzzers: extend ctrace fuzzer (PR #10217)
• mp: fix flb_mp_accessor_keys_remove for subkey siblings (PR #10013)
• conf: parsers: fix istio-envoy-proxy parser regex (PR #10203)

Libraries

• cfl: upgrade to v0.6.0 (PR #10195)
• chunkio: upgrade to v1.5.3 (PR #10195)
• ctraces: upgrade to v0.6.4 (PR #10195)
• cmetrics: upgrade to v1.0.0 (PR #10195)
• cprofiles: upgrade to v0.1.1 (PR #10195)
• nghttp2: upgrade to v1.65.0 (PR #10195)
• fluent-otel-proto: upgrade to v0.9.1 (PR #10195)
• librdkafka: upgrade to v2.8.0 (PR #10195)
• monkey: upgrade to v1.8.3 (PR #10195)

Plugins

• Storage_backlog (Input)
  • added missing routing mask initialization (PR #10183)
  • improved dummy route mask allocation strategy (PR #10183)
• Ebpf (Input)
  • remove cmake requirement (PR #10195)
• Tail (Input)
  • make read_from_head after the initial discovery optional (PR #10227)
  • added missing header (PR #10227)
  • fix disposal order to prevent use after free (PR #10237)
• OpenTelemetry (Input)
  • add missing schema_url property to scope. (PR #10201)
• Geoip2 (Filter)
  • upgrade libmaxminddb to v1.12.2 (PR #10195)
• Azure kusto (Output)
  • added buffering support (#9797) (PR #9797)
• Azure blob (Output)
  • fixed double free (PR #10235)
• OpenTelemetry (Output)
  • add record accessor for scope.schema_url for scope_logs. (PR #10201)
• Oracle log analytics (Output)
  • fix use-after-free on flush failure (PR #10189)
• Podman Metrics (Input)
  • fixed use after free which was discovered by failed CI builds (after migration from GCC 7 to GCC 9 in https://github.com/fluent/fluent-bit/pull/10230). (PR #10234)

Join us

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

• Github: http://github.com/fluent/fluent-bit
• Slack: http://slack.fluentd.org
• Twitter: @fluentbit