v1.26.0/v0.120.0

Images and binaries here: https://github.com/open-telemetry/opentelemetry-collector-releases/releases/tag/v0.120.0

End User Changelog

🛑 Breaking changes 🛑

• all: Added support for go1.24, bumped minimum version to 1.23 (#12370)
• mdatagen: Removing deprecated generated funcs and a few test funcs as well. (#12304)
• service: Align component logger attributes with those defined in RFC (#12217)
  See Pipeline Component Telemetry RFC

💡 Enhancements 💡

• otlpreceiver: Update stability for logs (#12335)
• exporterhelper: Implement sync disabled queue used when batching is enabled. (#12245)
• exporterhelper: Enable the new pull-based batcher in exporterhelper (#12291)
• exporterhelper: Update queue size after the element is done exported (#12399)
  After this change the active queue size will include elements in the process of being exported.
• otelcol: Add featuregate command to display information about available features (#11998)
  The featuregate command allows users to view detailed information about feature gates
  including their status, stage, and description.

🧰 Bug fixes 🧰

• memorylimiter: Logger no longer attributes to single signal, pipeline, or component. (#12217)
• otlpreceiver: Logger no longer attributes to random signal when receiving multiple signals. (#12217)
• exporterhelper: Fix undefined behavior access to request after send to next component. This causes random memory access. (#12281)
• exporterhelper: Fix default batcher to correctly call all done callbacks exactly once (#12247)
• otlpreceiver: Fix OTLP http receiver to correctly set Retry-After (#12367)
• otlphttpexporter: Fix parsing logic for Retry-After in OTLP http protocol. (#12366)
  The value of Retry-After field can be either an HTTP-date or delay-seconds and the current logic only parsed delay-seconds.
• cmd/builder: Ensure unique aliases for modules with same suffix (#12201)

API Changelog

🛑 Breaking changes 🛑

• configauth: Remove NewDefaultAuthentication (#12223)
  The value returned by this function will always cause an error on startup.
  In configgrpc.Client/ServerConfig.Auth, nil should be used instead to disable authentication.

• otelcol: Make the ConfigProvider interface a struct (#12297)
  Calls to NewConfigProvider will now return *ConfigProvider,
  but will otherwise work the same as before.

• extension: Remove extension.Settings.ModuleInfo (#12296)

  • The functionality is now available as an optional, hidden interface on service's implementation of the Host

• component: Remove deprecated field component.TelemetrySettings.MetricsLevel. (#11061)

• confighttp: Add ToClientOption type and add it to signature of ToClient method. (#12353)

  • This has no use for now, it may be used in the future.

• mdatagen: Remove unused not_component config for mdatagen (#12237)

🚩 Deprecations 🚩

• component/componenttest: Deprecate CheckReceiverMetrics in componenenttest (#12185)
  Use the metadatatest.AssertEqualMetric series of functions instead of obsreporttest.CheckReceiverMetrics
• component/componenttest: Deprecate CheckReceiverTraces in componenenttest (#12185)
  Use the metadatatest.AssertEqualMetric series of functions instead of obsreporttest.CheckReceiverTraces
• component: Deprecate ConfigValidator and ValidateConfig (#11524)
  Please use Validator and Validate respectively from xconfmap.
• receiver, scraper, processor, exporter, extension: Deprecate existing MakeFactoryMap functions in favor of generic implementation (#12222)
• extension, connector, processor, receiver, exporter, scraper: Deprecate Create* methods from Create*Func types. (#12305)
• extensiontest, connectortest, processortest, receivertest, exportertest, scrapertest: Deprecate *test.NewNopSettings in favor of *test.NewNopSettingsWithType (#12305)

🚀 New components 🚀

• xconfmap: Create the xconfmap module and add the Validator interface and Validate function to facilitate config validation (#11524)

💡 Enhancements 💡

• configgrpc: Add the omitempty mapstructure tag to struct fields (#12191)
  This results in unset fields not being rendered when marshaling.
• confignet: Add the omitempty mapstructure tag to struct fields (#12191)
  This results in unset fields not being rendered when marshaling.
• configtls: Add the omitempty mapstructure tag to struct fields (#12191)
  This results in unset fields not being rendered when marshaling.
• consumer: Clarify that data cannot be accessed after Consume* func is called. (#12284)
• pdata/pprofile: Introduce aggregation temporality constants (#12253)

🧰 Bug fixes 🧰

• configgrpc: Apply configured Headers automatically (#12307)
  configgrpc now calls metadata.AppendToOutgoingContext automatically in an interceptor.
  Components that were manually using metadata.NewOutgoingContext as a workaround no longer need to
  do so, unless they are overwriting or adding header keys.

• configgrpc: Set Auth to nil in NewDefaultClientConfig/NewDefaultServerConfig (#12223)
  The value that was used previously would always cause an error on startup.

• exporterqueue: Fix async queue to propagate cancellation all they way to the queue (#12282)

• otlpreceiver: Fix OTLP http receiver to correctly set Retry-After (#12367)

• extension: Explicitly error out at extension creation time if there is a type mismatch. (#12305)