Release v1.11.1/v0.33.0

[MrAlias]

Added

• The Prometheus exporter in go.opentelemetry.io/otel/exporters/prometheus registers with a Prometheus registerer on creation. By default, it will register with the default Prometheus default registerer. A non-default registerer can be used by passing the WithRegisterer option. (Refactor Prometheus exporter #3239)
• Added the WithAggregationSelector option to the go.opentelemetry.io/otel/exporters/prometheus package to change the default AggregationSelector used. (Added WithAggregationSelector to prometheus #3341)
• The Prometheus exporter in go.opentelemetry.io/otel/exporters/prometheus converts the Resource associated with metric exports into a target_info metric. (converts Resource into a target_info metric on the prometheus exporter #3285)

Changed

• The "go.opentelemetry.io/otel/exporters/prometheus".New function is updated to return an error. It will return an error if the exporter fails to register with Prometheus. (Refactor Prometheus exporter #3239)

Fixed

• The URL-encoded values from the OTEL_RESOURCE_ATTRIBUTES environment variable are decoded. (Decode values from OTEL_RESOURCE_ATTRIBUTES #2963)
• The baggage.NewMember function decodes the value parameter instead of directly using it. This fixes the implementation to be compliant with the W3C specification. (Fix baggage.NewMember to decode the accepted value #3226)
• Slice attributes of the attribute package are now comparable based on their value, not instance. (otlpmetric with StringSlice produces duplicate metrics #3108 attribute: fix slice related function bug #3252)
• The Shutdown and ForceFlush methods of the "go.opentelemetry.io/otel/sdk/trace".TraceProvider no longer return an error when no processor is registered. (Fix sdktrace.TraceProvider Shutdown/ForceFlush when no processor register #3268)
• The Prometheus exporter in go.opentelemetry.io/otel/exporters/prometheus cumulatively sums histogram buckets. (Prometheus exporter does not cumulatively sum histogram buckets #3281)
• The sum of each histogram data point is now uniquely exported by the go.opentelemetry.io/otel/exporters/otlpmetric exporters. (Histogram sum is not correct in latest version (critical) #3284, Fix HistogramDataPoints transform in otlpmetric #3293)
• Recorded values for asynchronous counters (Counter and UpDownCounter) are interpreted as exact, not incremental, sum values by the metric SDK. (Fix Asynchronous Counters Recording #3350, AsyncCounter and AsyncUpDownCounter expected callback value changed in v0.32.0 #3278)
• UpDownCounters are now correctly output as Prometheus gauges in the go.opentelemetry.io/otel/exporters/prometheus exporter. (Convert UpDownCounters to Prometheus gauges #3358)
• The Prometheus exporter in go.opentelemetry.io/otel/exporters/prometheus no longer describes the metrics it will send to Prometheus on startup. Instead the exporter is defined as an "unchecked" collector for Prometheus. This fixes the reader is not registered warning currently emitted on startup. (Prometheus exporter reports reader not registered on startup #3291 Removes the functionality of the Describe in prometheus exporter. #3342)
• The go.opentelemetry.io/otel/exporters/prometheus exporter now correctly adds _total suffixes to counter metrics. (Add _total suffixes to prometheus counters #3360)
• The go.opentelemetry.io/otel/exporters/prometheus exporter now adds a unit suffix to metric names. This can be disabled using the WithoutUnits() option added to that package. (Add unit suffixes to prometheus metric names #3352)

[codecov]

Codecov Report

Merging #3367 (13f017c) into main (510910e) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

❗ Current head 13f017c differs from pull request most recent head 6d45614. Consider uploading reports for the commit 6d45614 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #3367     +/-   ##
=======================================
- Coverage   78.0%   77.9%   -0.1%     
=======================================
  Files        164     164             
  Lines      11363   11348     -15     
=======================================
- Hits        8865    8848     -17     
- Misses      2301    2303      +2     
  Partials     197     197             

Impacted Files	Coverage Δ
version.go	100.0% <100.0%> (ø)
sdk/trace/batch_span_processor.go	81.1% <0.0%> (-0.9%)	⬇️
exporters/prometheus/exporter.go	83.3% <0.0%> (-0.8%)	⬇️
exporters/prometheus/config.go	100.0% <0.0%> (ø)