Images and binaries here: https://github.com/open-telemetry/opentelemetry-collector-releases/releases/tag/v0.122.0

End User Changelog

🛑 Breaking changes 🛑

• service: Batch processor telemetry is no longer emitted at "basic" verbosity level (#7890)
  According to the guidelines, basic-level telemetry should be reserved for core Collector APIs.
  Components such as the batch processor should emit telemetry starting from the "normal" level
  (which is also the default level).

  Migration: If your Collector telemetry was set to level: basic and you want to keep seeing
  batch processor-related metrics, consider switching to level: normal instead.

💡 Enhancements 💡

• service: Add service.AllowNoPipelines feature gate to allow starting the Collector without pipelines. (#12613)
  This can be used to start with only extensions.

• mdatagen: Delete generated_status.go if the component type doesn't require it. (#12346)

• componenttest: Improve config struct mapstructure field tag checks (#12590)
  remain tags and omitempty tags without a custom field name will now pass validation.

• service: include component id/type in start error (#10426)

• mdatagen: Add deprecation date and migration guide fields as part of component metadata (#12359)

• confmap: Introduce a new feature flag to allow for merging lists instead of discarding the existing ones. (#8394, #8754, #10370)
  You can enable this option via the command line by running following command:
  otelcol --config=main.yaml --config=extra_config.yaml --feature-gates=-confmap.enableMergeAppendOption

• zpagesextension: Add expvar handler to zpages extension. (#11081)

🧰 Bug fixes 🧰

• confmap: Maintain nil values when marshaling or unmarshaling nil slices (#11882)
  Previously, nil slices were converted to empty lists, which are semantically different
  than a nil slice. This change makes this conversion more consistent when encoding
  or decoding config, and these values are now maintained.

• service: do not attempt to register process metrics if they are disabled (#12098)

API Changelog

🛑 Breaking changes 🛑

• auth, authtest: Remove deprecated modules extension/auth and extension/auth/authtest (#12543)
  Use extension/extensionauth and extension/extensionauth/extensionauthtest instead.

• extensionauth: Remove deprecated methods from the Func types. (#12547)

• extensiontest, connectortest, processortest, receivertest, scrapertest, exportertest: Remove deprecated NewNopSettingsWithType functions, use NewNopSettings instead. (#12221)

• extensionauthtest: Remove the extensionauthtest.MockClient struct. (#12567)

  • Use extensionauthtest.NewNopClient to create a client with a noop implementation.
  • Use extensionauthtest.NewErrorClient to create a client that always returns an error.
  • Implement the extensionauth interfaces for custom mock client implementations.

• component/componenttest: Remove the deprecated componenttest.TestTelemetry in favor of componenttest.Telemetry (#12419)

• exporterhelper: Remove the Request.Export function in favor of an equivalent request consume func in the New[Traces|Metrics|Logs|Profiles]Request (#12637)

🚩 Deprecations 🚩

• exporterhelper: Deprecate per signal converter in favor of generic version (#12631)

• extensionauth: Deprecate extensionauth.NewClient and extensionauth.NewServer. (#12574)

  • Manually implement the interfaces instead.

• configauth: Deprecate configauth.Authenticator.GetClientAuthenticator. (#12574)

  • Use the per-protocol methods instead.

🚀 New components 🚀

• receiverhelper: Split receiverhelper into a separate module (#28328)

💡 Enhancements 💡

• cmd/mdatagen: Add supportsSignal func for Metadata type in mdatagen. (#12640)
• receiver: Mark module as stable (#12513)
• pdata/pcommon: Introduce Equal() method for comparison equality to Value, ByteSlice, Float64Slice, Int32Slice, Int64Slice, StringSlice, Uint64Slice, Map and Slice (#12594)
• pdata: Add iterator All method to pdata slices and map types. (#11982)
• pdata/pprofile: Introduce AddAttribute helper method to modify the content of attributable records (#12206)