Release v1.23.0/v0.45.1

[MrAlias]

This release contains the first stable, v1, release of the following modules:

• go.opentelemetry.io/otel/bridge/opencensus
• go.opentelemetry.io/otel/bridge/opencensus/test
• go.opentelemetry.io/otel/example/opencensus
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc
• go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
• go.opentelemetry.io/otel/exporters/stdout/stdoutmetric

See our versioning policy for more information about these stability guarantees.

Added

• Add WithEndpointURL option to the exporters/otlp/otlpmetric/otlpmetricgrpc, exporters/otlp/otlpmetric/otlpmetrichttp, exporters/otlp/otlptrace/otlptracegrpc and exporters/otlp/otlptrace/otlptracehttp packages. (Add WithEndpointURL option to OTLP over HTTP exporters #4808)
• Experimental exemplar exporting is added to the metric SDK. See metric documentation for more information about this feature and how to enable it. (Add the experimental exemplar feature #4871)
• ErrSchemaURLConflict is added to go.opentelemetry.io/otel/sdk/resource. This error is returned when a merge of two Resources with different (non-empty) schema URL is attempted. (Return merged Resource on schema conflict #4876)

Changed

• The Merge and New functions in go.opentelemetry.io/otel/sdk/resource now returns a partial result if there is a schema URL merge conflict. Instead of returning nil when two Resources with different (non-empty) schema URLs are merged the merged Resource, along with the new ErrSchemaURLConflict error, is returned. It is up to the user to decide if they want to use the returned Resource or not. It may have desired attributes overwritten or include stale semantic conventions. (Return merged Resource on schema conflict #4876)

Fixed

• Fix ContainerID resource detection on systemd when cgroup path has a colon. (Fix ContainerID detector on systemd with colon in cgroup path #4449)
• Fix go.opentelemetry.io/otel/sdk/metric to cache instruments to avoid leaking memory when the same instrument is created multiple times. (Cache instruments so repeatedly creating identical instruments doesn't leak memory #4820)
• Fix missing Mix and Max values for go.opentelemetry.io/otel/exporters/stdout/stdoutmetric by introducing MarshalText and MarshalJSON for the Extrema type in go.opentelemetry.io/sdk/metric/metricdata. (sdk/metric/metricdata: Add MarshalJSON for Extrema #4827)

[MrAlias]

The experimental-metric modset has a patch version bump to capture the dependency bump. No minor release given the lack of significant changes there.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2c7761d) 82.6% compared to head (694d468) 82.6%.
Report is 1 commits behind head on main.

❗ Current head 694d468 differs from pull request most recent head c0460a9. Consider uploading reports for the commit c0460a9 to get more accurate results

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4885   +/-   ##
=====================================
  Coverage   82.6%   82.6%           
=====================================
  Files        232     232           
  Lines      18862   18868    +6     
=====================================
+ Hits       15595   15603    +8     
+ Misses      2977    2975    -2     
  Partials     290     290           

Files	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/resource/auto.go	91.6% <100.0%> (+0.9%)	⬆️
sdk/resource/resource.go	76.6% <100.0%> (+0.1%)	⬆️
sdk/version.go	100.0% <100.0%> (ø)
version.go	100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes

[pellared]

Consider merging/waiting for #4887 before the release (nice to have, not a blocker).

[MrAlias]

Consider merging/waiting for #4887 before the release (nice to have, not a blocker).

I'm going to move ahead with merging this today. Blocking on that PR means this release is delayed another 24 hours at least.