Release v1.27.0/v0.49.0/v0.3.0

[MrAlias]

This release includes the first beta release of the OpenTelemetry Logs Bridge API and SDK for Go.

Added

• Add example for go.opentelemetry.io/otel/exporters/stdout/stdoutlog. (Add example for stdoutlog #5242)
• Add RecordFactory in go.opentelemetry.io/otel/sdk/log/logtest to facilitate testing exporter and processor implementations. (sdk/log/logtest: Add RecordFactory #5258)
• Add RecordFactory in go.opentelemetry.io/otel/log/logtest to facilitate testing bridge implementations. (log/logtest: add Record Factory #5263)
• The count of dropped records from the BatchProcessor in go.opentelemetry.io/otel/sdk/log is logged. (Log records dropped by the BatchProcessor #5276)
• Add metrics in the otel-collector example. (Collector example: add metrics #5283)
• Add the synchronous gauge instrument to go.opentelemetry.io/otel/metric. (Add the synchronous gauge to the metric API and SDK #5304)
  • An int64 or float64 synchronous gauge instrument can now be created from a Meter.
  • All implementations of the API (go.opentelemetry.io/otel/metric/noop, go.opentelemetry.io/otel/sdk/metric) are updated to support this instrument.
• Add logs to go.opentelemetry.io/otel/example/dice. (Add logs to dice example #5349)

Changed

• The Shutdown method of Exporter in go.opentelemetry.io/otel/exporters/stdout/stdouttrace ignores the context cancellation and always returns nil. (Remove context check on stdout exporters #5189)
• The ForceFlush and Shutdown methods of the exporter returned by New in go.opentelemetry.io/otel/exporters/stdout/stdoutmetric ignore the context cancellation and always return nil. (Remove context check on stdout exporters #5189)
• Apply the value length limits to Record attributes in go.opentelemetry.io/otel/sdk/log. (Truncate and de-duplicate log attribute values #5230)
• De-duplicate map attributes added to a Record in go.opentelemetry.io/otel/sdk/log. (Truncate and de-duplicate log attribute values #5230)
• go.opentelemetry.io/otel/exporters/stdout/stdoutlog won't print timestamps when WithoutTimestamps option is set. (stdoutlog: Do not print timestamps when WithoutTimestamps is set #5241)
• The go.opentelemetry.io/otel/exporters/stdout/stdoutlog exporter won't print AttributeValueLengthLimit and AttributeCountLimit fields now, instead it prints the DroppedAttributes field. (The stdoutlog exporter prints DroppedAttributes field instead of Limits fields #5272)
• Improved performance in the Stringer implementation of go.opentelemetry.io/otel/baggage.Member by reducing the number of allocations. (feat: opt for concatenation instead of using fmt.Sprintf #5286)
• Set the start time for last-value aggregates in go.opentelemetry.io/otel/sdk/metric. (Support Delta & Cumulative temporality for LastValue aggregates #5305)
• The Span in go.opentelemetry.io/otel/sdk/trace will record links without span context if either non-empty TraceState or attributes are provided. (Record links with empty span context #5315)
• Upgrade all dependencies of go.opentelemetry.io/otel/semconv/v1.24.0 to go.opentelemetry.io/otel/semconv/v1.25.0. (Update all semconv use to v1.25.0 #5374)

Fixed

• Comparison of unordered maps for go.opentelemetry.io/otel/log.KeyValue and go.opentelemetry.io/otel/log.Value. (log: Fix comparison of unordered map values #5306)
• Fix the empty output of go.opentelemetry.io/otel/log.Value in go.opentelemetry.io/otel/exporters/stdout/stdoutlog. (Fix empty log body printed by stdoutlog exporter #5311)
• Split the behavior of Recorder in go.opentelemetry.io/otel/log/logtest so it behaves as a LoggerProvider only. (Split log/logtest into a recorder and a logger #5365)
• Fix wrong package name of the error message when parsing endpoint URL in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp. (Fix package prefix of error in otlploghttp #5371)
• Identify the Logger returned from the global LoggerProvider in go.opentelemetry.io/otel/log/global with its schema URL. (Identify logger with schemaURL in global logger provider #5375)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.5%. Comparing base (0d3dddc) to head (2588fd7).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #5392   +/-   ##
=====================================
  Coverage   84.5%   84.5%           
=====================================
  Files        268     268           
  Lines      17796   17796           
=====================================
  Hits       15052   15052           
  Misses      2430    2430           
  Partials     314     314           

Files	Coverage Δ
bridge/opencensus/version.go	100.0% <100.0%> (ø)
exporters/otlp/otlplog/otlploghttp/version.go	100.0% <100.0%> (ø)
...xporters/otlp/otlpmetric/otlpmetricgrpc/version.go	100.0% <100.0%> (ø)
...xporters/otlp/otlpmetric/otlpmetrichttp/version.go	100.0% <100.0%> (ø)
exporters/otlp/otlptrace/version.go	100.0% <100.0%> (ø)
sdk/metric/version.go	100.0% <100.0%> (ø)
sdk/version.go	100.0% <100.0%> (ø)
version.go	100.0% <100.0%> (ø)