Release v1.43.0 / v0.65.0 / v0.19.0

[dmathieu]

Release issue: #8127

Added

• Add IsRandom and WithRandom on TraceFlags, and IsRandom on SpanContext in go.opentelemetry.io/otel/trace
  for W3C Trace Context Level 2 Random Trace ID Flag support. (trace: add Random Trace ID Flag #8012)
• Add service detection with WithService in go.opentelemetry.io/otel/sdk/resource. (resource: add WithService detector option #7642)
• Add DefaultWithContext and EnvironmentWithContext in go.opentelemetry.io/otel/sdk/resource to support plumbing context.Context through default and environment detectors. (sdk/resource: add WithContext variants for Default and Environment (#7808) #8051)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Add support for per-series start time tracking for cumulative metrics in go.opentelemetry.io/otel/sdk/metric.
  Set OTEL_GO_X_PER_SERIES_START_TIMESTAMPS=true to enable. (Add support for the development per-series starttime feature #8060)
• Add WithCardinalityLimitSelector for metric reader for configuring cardinality limits specific to the instrument kind. (sdk/metric: Support specifying cardinality limits per instrument kinds #7855)

Changed

• Introduce the EMPTY Type in go.opentelemetry.io/otel/attribute to reflect that an empty value is now a valid value, with INVALID remaining as a deprecated alias of EMPTY. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)
• Refactor slice handling in go.opentelemetry.io/otel/attribute to optimize short slice values with fixed-size fast paths. (Optimize attribute slice conversion #8039)
• Improve performance of span metric recording in go.opentelemetry.io/otel/sdk/trace by returning early if self-observability is not enabled. (sdk/trace/internal/observ: guard SpanStarted and spanLive with Enabled #8067)
• Improve formatting of metric data diffs in go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest. (metricdatatest: Improve printing of diffs #8073)

Deprecated

• Deprecate INVALID in go.opentelemetry.io/otel/attribute. Use EMPTY instead. (attribute: change INVALID Type to EMPTY and mark INVALID as deprecated #8038)

Fixed

• Return spec-compliant TraceIdRatioBased description. This is a breaking behavioral change, but it is necessary to
  make the implementation spec-compliant. (fix(sdk/trace): return spec-compliant TraceIdRatioBased description #8027)
• Fix a race condition in go.opentelemetry.io/otel/sdk/metric where the lastvalue aggregation could collect the value 0 even when no zero-value measurements were recorded. (Fix race in the lastvalue aggregation where 0 could be observed #8056)
• Limit HTTP response body to 4 MiB in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to mitigate excessive memory usage caused by a misconfigured or malicious server.
  Responses exceeding the limit are treated as non-retryable errors. (limit response body size for OTLP HTTP exporters #8108)
• Limit HTTP response body to 4 MiB in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp to mitigate excessive memory usage caused by a misconfigured or malicious server.
  Responses exceeding the limit are treated as non-retryable errors. (limit response body size for OTLP HTTP exporters #8108)
• Limit HTTP response body to 4 MiB in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp to mitigate excessive memory usage caused by a misconfigured or malicious server.
  Responses exceeding the limit are treated as non-retryable errors. (limit response body size for OTLP HTTP exporters #8108)
• WithHostID detector in go.opentelemetry.io/otel/sdk/resource to use full path for kenv command on BSD. (Use an absolute path when calling bsd kenv #8113)
• Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp to correctly handle HTTP2 GOAWAY frame. (fix: support getBody in otelploghttp #8096)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.8%. Comparing base (61b8c94) to head (af95c09).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #8128   +/-   ##
=====================================
  Coverage   81.8%   81.8%           
=====================================
  Files        308     308           
  Lines      23709   23709           
=====================================
+ Hits       19396   19399    +3     
+ Misses      3935    3932    -3     
  Partials     378     378           

Files with missing lines	Coverage Δ
bridge/opencensus/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)

... and 2 files with indirect coverage changes

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