Release v1.29.0/v0.51.0/v0.5.0

[MrAlias]

This release is the last to support Go 1.21. The next release will require at least Go 1.22.

Added

• Add MacOS ARM64 platform to the compatibility testing suite. ([chore] Update macOS runners #5577)
• Add InstrumentationScope field to SpanStub in go.opentelemetry.io/otel/sdk/trace/tracetest, as a replacement for the deprecated InstrumentationLibrary. (Allow relying on InstrumentationScope in SpanStub and fix remaining deprecation issues #5627)
• Make the initial release of go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc. This new module contains an OTLP exporter that transmits log telemetry using gRPC. This module is unstable and breaking changes may be introduced. See our versioning policy for more information about these stability guarantees. (Include otlploggrpc module into the experimental-logs #5629)
• Add Walk function to TraceState in go.opentelemetry.io/otel/trace to iterate all the key-value pairs. (OpenCensus bridge to support TraceState #5651)
• Bridge the trace state in go.opentelemetry.io/otel/bridge/opencensus. (OpenCensus bridge to support TraceState #5651)
• Zero value of SimpleProcessor in go.opentelemetry.io/otel/sdk/log no longer panics. (sdk/log: SimpleProcessor to not panic for zero value #5665)
• The FilterProcessor interface type is added in go.opentelemetry.io/otel/sdk/log/internal/x. This is an optional and experimental interface that log Processors can implement to instruct the Logger if a Record will be processed or not. It replaces the existing Enabled method that is removed from the Processor interface itself. It does not fall within the scope of the OpenTelemetry Go versioning and stability policy and it may be changed in backwards incompatible ways or removed in feature releases. (Move log.Processor.Enabled to independent FilterProcessor interfaced type #5692)
• Support Go 1.23. (Add support for go 1.23 #5720)

Changed

• NewMemberRaw, NewKeyProperty and NewKeyValuePropertyRaw in go.opentelemetry.io/otel/baggage allow UTF-8 string in key. (baggage: Accept non-ASCII keys #5132)
• Processor.OnEmit in go.opentelemetry.io/otel/sdk/log now accepts a pointer to Record instead of a value so that the record modifications done in a processor are propagated to subsequent registered processors. (sdk/log: Processor.OnEmit accetps a Record pointer #5636)
• SimpleProcessor.Enabled in go.opentelemetry.io/otel/sdk/log now returns false if the exporter is nil. (sdk/log: SimpleProcessor to not panic for zero value #5665)
• Update the concurrency requirements of Exporter in go.opentelemetry.io/otel/sdk/log. (sdk/log: SimpleProcessor synchronizes OnEmit calls #5666)
• SimpleProcessor in go.opentelemetry.io/otel/sdk/log synchronizes OnEmit calls. (sdk/log: SimpleProcessor synchronizes OnEmit calls #5666)
• The Processor interface in go.opentelemetry.io/otel/sdk/log no longer includes the Enabled method. See the FilterProcessor interface type added in go.opentelemetry.io/otel/sdk/log/internal/x to continue providing this functionality. (Move log.Processor.Enabled to independent FilterProcessor interfaced type #5692)
• The SimpleProcessor type in go.opentelemetry.io/otel/sdk/log is no longer comparable. (Ensure exported struct in sdk/log are not comparable #5693)
• The BatchProcessor type in go.opentelemetry.io/otel/sdk/log is no longer comparable. (Ensure exported struct in sdk/log are not comparable #5693)

Fixed

• Correct comments for the priority of the WithEndpoint and WithEndpointURL options and their corresponding environment variables in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. ( Correct the comment for the priority of options and environments on otlptracehttp #5584)
• Pass the underlying error rather than a generic retry-able failure in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp, go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp and go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (Parse errormsgs in retryable status codes #5541)
• Correct the Tracer, Meter, and Logger names used in go.opentelemetry.io/otel/example/dice. (Update example instrumentation names #5612)
• Correct the Tracer names used in go.opentelemetry.io/otel/example/namedtracer. (Update example instrumentation names #5612)
• Correct the Tracer name used in go.opentelemetry.io/otel/example/opencensus. (Update example instrumentation names #5612)
• Correct the Tracer and Meter names used in go.opentelemetry.io/otel/example/otel-collector. (Update example instrumentation names #5612)
• Correct the Tracer names used in go.opentelemetry.io/otel/example/passthrough. (Update example instrumentation names #5612)
• Correct the Meter name used in go.opentelemetry.io/otel/example/prometheus. (Update example instrumentation names #5612)
• Correct the Tracer names used in go.opentelemetry.io/otel/example/zipkin. (Update example instrumentation names #5612)
• Correct comments for the priority of the WithEndpoint and WithEndpointURL options and their corresponding environment variables in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc and go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (Correct the comment for the priority of options and environments on otlpmetric #5641)
• Correct comments for the priority of the WithEndpoint and WithEndpointURL options and their corresponding environment variables in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp. (Correct the comment for the priority of options and environments on otlploghttp #5650)
• Stop percent encoding header environment variables in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp, go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc and go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp (Bugfix: OTLP exporters should not percent decode the key when parsing HEADERS env vars #5705)
• Remove invalid environment variable header keys in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc, go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp, go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc and go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp (Bugfix: OTLP exporters should not percent decode the key when parsing HEADERS env vars #5705)

Removed

• The Enabled method of the SimpleProcessor in go.opentelemetry.io/otel/sdk/log is removed. (Move log.Processor.Enabled to independent FilterProcessor interfaced type #5692)
• The Enabled method of the BatchProcessor in go.opentelemetry.io/otel/sdk/log is removed. (Move log.Processor.Enabled to independent FilterProcessor interfaced type #5692)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (2a54df7) to head (1842fb6).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5732   +/-   ##
=====================================
  Coverage   84.5%   84.5%           
=====================================
  Files        272     272           
  Lines      22661   22661           
=====================================
+ Hits       19154   19155    +1     
+ Misses      3167    3166    -1     
  Partials     340     340           

see 1 file with indirect coverage changes