feat(fluentbit): Update fluent/fluent-bit to v4 which adds support for structured metadata to the out_loki plugin

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This PR contains the following updates:

Package	Type	Update	Change
fluent/fluent-bit	final	major	3.2.10 -> 4.0.0
fluent/fluent-bit		major	3.2 -> 4.0

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Release Notes

fluent/fluent-bit (fluent/fluent-bit)

v4.0.0: Fluent Bit 4.0.0

Compare Source

https://fluentbit.io/announcements/v4.0.0/

What's Changed

• build: bump to 4.0.0 by @​edsiper in https://github.com/fluent/fluent-bit/pull/9781
• packaging: raspbian: support raspbian bookworm package creation by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9760
• stackdriver: add cloud_logging_base_url by @​braydonk in https://github.com/fluent/fluent-bit/pull/9779
• CODEOWNERS: change out_stackdriver code owners by @​braydonk in https://github.com/fluent/fluent-bit/pull/9806
• lib: monkey: add missing files by @​edsiper in https://github.com/fluent/fluent-bit/pull/9804
• in_systemd: fix buffer over-read by @​bpetermannS11 in https://github.com/fluent/fluent-bit/pull/9789
• core: profile signal path addition by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/9748
• readme: add swym logo to fluentbit_users.png by @​erikbledsoe in https://github.com/fluent/fluent-bit/pull/9809
• custom_calyptia: switch to YAML for Fleet config by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9698
• tests: runtime_shell: custom_calyptia prevent fail on macOS at cleanup by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9827
• workflows: macos: Build Intel Mac packages by macos-14-large runner by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9834
• http: fixed assorted header related issues in both client and server by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/9848
• lib: monkey: upgrade to v1.8.2 by @​edsiper in https://github.com/fluent/fluent-bit/pull/9850
• in_ebpf: core: Prepare eBPF skeletons before starting to compile in_ebpf plugin properly by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9856
• pack: fix missing scientific notation in JSON parser by @​aivarasbaranauskas in https://github.com/fluent/fluent-bit/pull/9852
• package: distro: dockerfiles: Install libcurl development package for oauthoicd on rdkafka by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9860
• workflows: update daily builds for 3.2 by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9866
• workflows: speed up Raspbian builds by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9838
• workflows: increase size of container builders by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9869
• packaging: skip empty repos by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9880
• workflows: split container builds per-arch by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9875
• in_opentelemetry: fix finalization of group for gRPC payload by @​edsiper in https://github.com/fluent/fluent-bit/pull/9882
• tests: in_kubernetes_events: try/wait for output to make tests less flakey, re #​9570. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/9877
• in_calyptia_fleet: log info about config pulled from API by @​nuclearpidgeon in https://github.com/fluent/fluent-bit/pull/9892
• workflows: disable s390x container builds for release by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9898
• in_tail: reintroduced the old ignore_older behavior as opt-in by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/9911
• log: added a new management signal to overcome a dedadlock by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/9918
• workflows: remove qemu usage by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/9931
• in_opentelemetry: add support for OpenTelemetry JSON traces by @​edsiper in https://github.com/fluent/fluent-bit/pull/9938
• zstd: introduce zstd compression support in Fluent Bit (cleanup) by @​edsiper in https://github.com/fluent/fluent-bit/pull/9890
• out_opentelemetry: auto configure HTTP/2 protocol when gRPC is enabled by @​edsiper in https://github.com/fluent/fluent-bit/pull/9930
• in_opentelemetry: refactor Logs handling and add support for gRPC message compression by @​edsiper in https://github.com/fluent/fluent-bit/pull/9953
• in_kubernetes_events: fix sqldb cleanup by @​cm-rudolph in https://github.com/fluent/fluent-bit/pull/9894
• input_chunk: log plugin alias instead of plugin name if exists. by @​lecaros in https://github.com/fluent/fluent-bit/pull/9961
• conditionals: add NOT_REGEX operator to conditional processing by @​niedbalski in https://github.com/fluent/fluent-bit/pull/9960
• in_splunk: fix memory corruption by resetting parser after reallocation by @​niedbalski in https://github.com/fluent/fluent-bit/pull/9965
• http input layer: fix parser state after memory reallocation by @​edsiper in https://github.com/fluent/fluent-bit/pull/9970
• in_http: add compression handling support for gzip, snappy and zstd by @​edsiper in https://github.com/fluent/fluent-bit/pull/9977
• bug-fix : Check for clang build dependency when building ebpf by @​abhi-jha in https://github.com/fluent/fluent-bit/pull/9926
• out_http: add zstd and snappy compression by @​edsiper in https://github.com/fluent/fluent-bit/pull/9979
• CODEOWNERS: add AWS code-owners for AWS-related files by @​singholt in https://github.com/fluent/fluent-bit/pull/9951
• conditionals: add GTE and LTE operators by @​niedbalski in https://github.com/fluent/fluent-bit/pull/9980
• workflows: bump ossf/scorecard-action from 2.4.0 to 2.4.1 by @​dependabot in https://github.com/fluent/fluent-bit/pull/9998
• security update: CVE-2024-50608 and CVE-2024-50609 by @​edsiper in https://github.com/fluent/fluent-bit/pull/9993
• workflows: pin QEMU version for Raspbian only by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10005
• bug-fix: Set correct and unique repo meta data by @​pluhmen in https://github.com/fluent/fluent-bit/pull/9949
• in_opentelemetry: fix groups encoding by closing headers properly by @​edsiper in https://github.com/fluent/fluent-bit/pull/10018
• internal: test: conditional: Add Byte-Order-Mark(BOM) for non western Windows environments by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9988
• filter_kubernetes: add owner references information into record. by @​shuaich in https://github.com/fluent/fluent-bit/pull/9719
• zstd: add support for compressed unknown size by @​edsiper in https://github.com/fluent/fluent-bit/pull/10021
• out_http: fix logic to handle status of compressed payloads (fix #​10016) by @​edsiper in https://github.com/fluent/fluent-bit/pull/10023
• ra: add support for direct array access notation by @​niedbalski in https://github.com/fluent/fluent-bit/pull/10007
• workflows: bump uraimo/run-on-arch-action from 2 to 3 by @​dependabot in https://github.com/fluent/fluent-bit/pull/10034
• workflows: update release with minor fixes by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10040
• packaging: revert apt repo origin/label info. by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10045
• workflows: ensure we approve cosign by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10046
• out_splunk: added otlp metadata support by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10035
• filter_modifier: added missing log event encoder and decoder disposal by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10057
• http_server_http1: updated the request size measurement function by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10062
• input_thread: added missing sanity check by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10048
• out_loki: add stuctured_metadata_map_keys by @​0x006EA1E5 in https://github.com/fluent/fluent-bit/pull/9530
• in_opentelemetry: logs: add missing checks for resource and scope by @​edsiper in https://github.com/fluent/fluent-bit/pull/10077
• out_opentelemetry: restored old group meta record processing mechanism by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10080
• tests: fix tests that call pthread_join on stopped contexts and crash on macos. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/10025
• workflows: remove invalid sync directory by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10088
• out_opentelemetry: switch config property 'http2' default to 'off' by @​edsiper in https://github.com/fluent/fluent-bit/pull/10089
• out_gelf: fix crash after missing short_message key by @​bpetermannS11 in https://github.com/fluent/fluent-bit/pull/10087
• in_opentelemetry: fix handling of status code in JSON traces by @​edsiper in https://github.com/fluent/fluent-bit/pull/10091
• workflows: support optional image pushing by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10106
• record_accesor: fix return value for flb_ra_get_kv_pair when get_ra_parser fails. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/10105
• workflows: fix optional image pushing by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10107
• input_chunk: check return values when calculating found chunks for new space. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/9921
• aws: add support for EKS Pod Identity by @​zhihonl in https://github.com/fluent/fluent-bit/pull/10114
• processor: fix missing read_groups flags for log event decoder by @​edsiper in https://github.com/fluent/fluent-bit/pull/10117
• processor_sampling: new trace sampling processor by @​edsiper in https://github.com/fluent/fluent-bit/pull/10029
• out_splunk: when packing OTel metadata, include resource attributes by @​edsiper in https://github.com/fluent/fluent-bit/pull/10119
• custom: add support for net properties to custom plugins. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/9821
• input: add support for upstream configuration for input client plugins. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/8142
• out_exit: add time_count (seconds) and record_count parameters for out_exit. by @​pwhelan in https://github.com/fluent/fluent-bit/pull/8621
• tls: add support for setting min/max TLS version and cipher list by @​edsiper in https://github.com/fluent/fluent-bit/pull/10133
• workflows: update release promotion to correctly sync by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10135
• windows: disable unused build targets and optimise container by @​patrick-stephens in https://github.com/fluent/fluent-bit/pull/10136
• in_kafka: optimize poll timeout handling for threaded and main event loop modes by @​nareshku in https://github.com/fluent/fluent-bit/pull/10122
• task_map: added task map scaling by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10044
• out_azure_kusto: azure managed identity support added by @​dceravigupta in https://github.com/fluent/fluent-bit/pull/10036
• help: register global options by @​edsiper in https://github.com/fluent/fluent-bit/pull/10134
• processor: add conditional processing support for logs by @​niedbalski in https://github.com/fluent/fluent-bit/pull/10142
• processor_labels: add support for record accessor in values by @​edsiper in https://github.com/fluent/fluent-bit/pull/9841
• env: add support to set environment variable content from a file by @​edsiper in https://github.com/fluent/fluent-bit/pull/10144
• simdutf: simdutf_connector: in_tail: Implement UTF-16LE/UTF-16BE encoder by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9468
• simd: riscv: implement RVV intrinsics by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9731
• unescape: Decode \u escaped characters for surrogate pairs correctly by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9799
• systemd: build: Add sethostname workaround for AmazonLinux2 by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9845
• kafka: Display error messages on error for rd_kafka_conf_set() by @​cosmo0920 in https://github.com/fluent/fluent-bit/pull/9859
• pipe: add flb_pipe_error by @​braydonk in https://github.com/fluent/fluent-bit/pull/10017
• headers: cleanup paths for external header inclusion by @​edsiper in https://github.com/fluent/fluent-bit/pull/10054
• out_datadog: Fix formatting issue when setting a static hostname by @​ddrthall in https://github.com/fluent/fluent-bit/pull/10104
• version: update copyright to 2025 by @​edsiper in https://github.com/fluent/fluent-bit/pull/10147
• processor_content_modifier: fix and enhance data type conversion by @​edsiper in https://github.com/fluent/fluent-bit/pull/10146
• core: zig integration addition by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10149
• log_event_decoder: improved group metadata fields are availability by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10151
• routes_mask: added auto scalable route mask size feature by @​leonardo-albertovich in https://github.com/fluent/fluent-bit/pull/10155
• out_splunk: do not fail on Opentelemetry packing if some Log fields are missing by @​edsiper in https://github.com/fluent/fluent-bit/pull/10153

New Contributors

• @​abhi-jha made their first contribution in https://github.com/fluent/fluent-bit/pull/9926
• @​singholt made their first contribution in https://github.com/fluent/fluent-bit/pull/9951
• @​pluhmen made their first contribution in https://github.com/fluent/fluent-bit/pull/9949
• @​dceravigupta made their first contribution in https://github.com/fluent/fluent-bit/pull/10036
• @​ddrthall made their first contribution in https://github.com/fluent/fluent-bit/pull/10104

Full Changelog: fluent/fluent-bit@v3.2.4...v4.0.0

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