Release v1.5.0

[MrAlias]

Added

• Log the Exporters configuration in the TracerProviders message. (Add Marshaling implementations for exporters #2578)

• Added support to configure the span limits with environment variables.
  The following environment variables are supported. (Add env support for span limits configuration #2606, Update span limits to comply with specification #2637)

  • OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT
  • OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT
  • OTEL_SPAN_EVENT_COUNT_LIMIT
  • OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT
  • OTEL_SPAN_LINK_COUNT_LIMIT
  • OTEL_LINK_ATTRIBUTE_COUNT_LIMIT

  If the provided environment variables are invalid (negative), the default values would be used.

• Rename the gc runtime name to go (Change gc runtime name to go #2560)

• Add resource container ID detection. (Add container id support to Resource #2418)

• Add span attribute value length limit.
  The new AttributeValueLengthLimit field is added to the "go.opentelemetry.io/otel/sdk/trace".SpanLimits type to configure this limit for a TracerProvider.
  The default limit for this resource is "unlimited". (Update span limits to comply with specification #2637)

• Add the WithRawSpanLimits option to go.opentelemetry.io/otel/sdk/trace.
  This option replaces the WithSpanLimits option.
  Zero or negative values will not be changed to the default value like WithSpanLimits does.
  Setting a limit to zero will effectively disable the related resource it limits and setting to a negative value will mean that resource is unlimited.
  Consequentially, limits should be constructed using NewSpanLimits and updated accordingly. (Update span limits to comply with specification #2637)

Changed

• Drop oldest tracestate Member when capacity is reached. (fix(tracestate): drop right-most member in tracestate #2592)
• Add event and link drop counts to the exported data from the oltptrace exporter. (feature/exporter: add Drop Counts for oltptracer's event and link #2601)
• Unify path cleaning functionally in the otlpmetric and otlptrace configuration. (Unify OTLP path parsing/default Logic #2639)
• Change the debug message from the sdk/trace.BatchSpanProcessor to reflect the count is cumulative. (Update BatchSpanProcessor debug message #2640)
• Introduce new internal envconfig package for OTLP exporters. (Refactor OTLP exporter env config to be shared across all exporters #2608)
• If http.Request.Host is empty, fall back to use URL.Host when populating http.host in the semconv packages. (fallback to URL.Host if Request.Host is empty #2661)

Fixed

• Remove the OTLP trace exporter limit of SpanEvents when exporting. (Remove the otlp trace exporter limit of SpanEvents when exporting #2616)
• Default to port 4318 instead of 4317 for the otlpmetrichttp and otlptracehttp client. (Collector and http client port mismatch #2614, Use port 4318 for otlp*http client default #2625)
• Unlimited span limits are now supported (negative values). (Support "unlimited" limit values #2636, Update span limits to comply with specification #2637)

Deprecated

• Deprecated "go.opentelemetry.io/otel/sdk/trace".WithSpanLimits.
  Use WithRawSpanLimits instead.
  That option allows setting unlimited and zero limits, this option does not.
  This option will be kept until the next major version incremented release. (Update span limits to comply with specification #2637)

[codecov]

Codecov Report

Merging #2676 (cb02149) into main (b229997) will not change coverage.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #2676   +/-   ##
=====================================
  Coverage   75.8%   75.8%           
=====================================
  Files        173     173           
  Lines      11672   11672           
=====================================
  Hits        8850    8850           
  Misses      2612    2612           
  Partials     210     210           

Impacted Files	Coverage Δ
version.go	100.0% <100.0%> (ø)
exporters/jaeger/jaeger.go	90.3% <0.0%> (-0.9%)	⬇️
sdk/trace/batch_span_processor.go	81.1% <0.0%> (+0.9%)	⬆️

[XSAM]

👍

[MadVikingGod]

It's odd that a race test is failing. We should keep an eye on that to make sure that's not another round of the flakey test.