Release v0.32.2 -- Metric SDK (Alpha)

Added

• Added an example of using metric views to customize instruments. (#3177)
• Add default User-Agent header to OTLP exporter requests (go.opentelemetry.io/otel/exporters/otlpmetric/otlpmetricgrpc and go.opentelemetry.io/otel/exporters/otlpmetric/otlpmetrichttp). (#3261)

Changed

• Flush pending measurements with the PeriodicReader in the go.opentelemetry.io/otel/sdk/metric when ForceFlush or Shutdown are called. (#3220)
• Update histogram default bounds to match the requirements of the latest specification. (#3222)

Fixed

• Use default view if instrument does not match any registered view of a reader. (#3224, #3237)
• Return the same instrument every time a user makes the exact same instrument creation call. (#3229, #3251)
• Return the existing instrument when a view transforms a creation call to match an existing instrument. (#3240, #3251)
• Log a warning when a conflicting instrument (e.g. description, unit, data-type) is created instead of returning an error. (#3251)
• The OpenCensus bridge no longer sends empty batches of metrics. (#3263)

Release v0.32.1 -- Metric SDK (Alpha)

Changed

• The Prometheus exporter sanitizes OpenTelemetry instrument names when exporting. Invalid characters are replaced with _. (#3212)

Added

• The metric portion of the OpenCensus bridge (go.opentelemetry.io/otel/bridge/opencensus) has been reintroduced. (#3192)
• The OpenCensus bridge example (go.opentelemetry.io/otel/example/opencensus) has been reintroduced. (#3206)

Fixed

• Updated go.mods to point to valid versions of the sdk. (#3216)
• Set the MeterProvider resource on all exported metric data. (#3218)

Release v0.32.0 -- Metric SDK (Alpha)

Changed

• The metric SDK in go.opentelemetry.io/otel/sdk/metric is completely refactored to comply with the OpenTelemetry specification. Please see the package documentation for how the new SDK is initialized and configured. (#3175)

Removed

• The metric portion of the OpenCensus bridge (go.opentelemetry.io/otel/bridge/opencensus) has been removed. A new bridge compliant with the revised metric SDK will be added back in a future release. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/aggregator/aggregatortest package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/aggregator/histogram package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/aggregator/lastvalue package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/aggregator/sum package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/aggregator package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/controller/basic package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/controller/controllertest package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/controller/time package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/export/aggregation package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/export package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/metrictest package is removed. A replacement package that supports the new metric SDK will be added back in a future release. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/number package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/processor/basic package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/processor/processortest package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/processor/reducer package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/registry package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/sdkapi package is removed, see the new metric SDK. (#3175)
• The go.opentelemetry.io/otel/sdk/metric/selector/simple package is removed, see the new metric SDK. (#3175)
• The "go.opentelemetry.io/otel/sdk/metric".ErrUninitializedInstrument variable was removed. (#3175)
• The "go.opentelemetry.io/otel/sdk/metric".ErrBadInstrument variable was removed. (#3175)
• The "go.opentelemetry.io/otel/sdk/metric".Accumulator type was removed, see the MeterProviderin the new metric SDK. (#3175)
• The "go.opentelemetry.io/otel/sdk/metric".NewAccumulator function was removed, see NewMeterProviderin the new metric SDK. (#3175)
• The deprecated "go.opentelemetry.io/otel/sdk/metric".AtomicFieldOffsets function was removed. (#3175)

Release v1.10.0

Added

• Support Go 1.19. (#3077)
  Include compatibility testing and document support. (#3077)
• Support the OTLP ExportTracePartialSuccess response; these are passed to the registered error handler. (#3106)
• Upgrade go.opentelemetry.io/proto/otlp from v0.18.0 to v0.19.0 (#3107)

Changed

• Fix misidentification of OpenTelemetry SpanKind in OpenTracing bridge (go.opentelemetry.io/otel/bridge/opentracing). (#3096)
• Attempting to start a span with a nil context will no longer cause a panic. (#3110)
• All exporters will be shutdown even if one reports an error (#3091)
• Ensure valid UTF-8 when truncating over-length attribute values. (#3156)

Release v1.9.0/v0.0.3

Added

• Add support for Schema Files format 1.1.x (metric "split" transform) with the new go.opentelemetry.io/otel/schema/v1.1 package. (#2999)
• Add the go.opentelemetry.io/otel/semconv/v1.11.0 package.
  The package contains semantic conventions from the v1.11.0 version of the OpenTelemetry specification. (#3009)
• Add the go.opentelemetry.io/otel/semconv/v1.12.0 package.
  The package contains semantic conventions from the v1.12.0 version of the OpenTelemetry specification. (#3010)
• Add the http.method attribute to HTTP server metric from all go.opentelemetry.io/otel/semconv/* packages. (#3018)

Fixed

• Invalid warning for context setup being deferred in go.opentelemetry.io/otel/bridge/opentracing package. (#3029)

Release v1.8.0/v0.31.0

1.8.0/0.31.0 - 2022-07-08

Added

• Add support for opentracing.TextMap format in the Inject and Extract methods
  of the "go.opentelemetry.io/otel/bridge/opentracing".BridgeTracer type. (#2911)

Changed

• The crosslink make target has been updated to use the go.opentelemetry.io/build-tools/crosslink package. (#2886)
• In the go.opentelemetry.io/otel/sdk/instrumentation package rename Library to Scope and alias Library as Scope (#2976)
• Move metric no-op implementation form nonrecording to metric package. (#2866)

Removed

• Support for go1.16. Support is now only for go1.17 and go1.18 (#2917)

Deprecated

• The Library struct in the go.opentelemetry.io/otel/sdk/instrumentation package is deprecated.
  Use the equivalent Scope struct instead. (#2977)
• The ReadOnlySpan.InstrumentationLibrary method from the go.opentelemetry.io/otel/sdk/trace package is deprecated.
  Use the equivalent ReadOnlySpan.InstrumentationScope method instead. (#2977)

Release v1.7.0/v0.30.0

Added

• Add the go.opentelemetry.io/otel/semconv/v1.8.0 package.
  The package contains semantic conventions from the v1.8.0 version of the OpenTelemetry specification. (#2763)
• Add the go.opentelemetry.io/otel/semconv/v1.9.0 package.
  The package contains semantic conventions from the v1.9.0 version of the OpenTelemetry specification. (#2792)
• Add the go.opentelemetry.io/otel/semconv/v1.10.0 package.
  The package contains semantic conventions from the v1.10.0 version of the OpenTelemetry specification. (#2842)
• Added an in-memory exporter to metrictest to aid testing with a full SDK. (#2776)

Fixed

• Globally delegated instruments are unwrapped before delegating asynchronous callbacks. (#2784)
• Remove import of testing package in non-tests builds of the go.opentelemetry.io/otel package. (#2786)

Changed

• The WithLabelEncoder option from the go.opentelemetry.io/otel/exporters/stdout/stdoutmetric package is renamed to WithAttributeEncoder. (#2790)
• The LabelFilterSelector interface from go.opentelemetry.io/otel/sdk/metric/processor/reducer is renamed to AttributeFilterSelector.
  The method included in the renamed interface also changed from LabelFilterFor to AttributeFilterFor. (#2790)
• The Metadata.Labels method from the go.opentelemetry.io/otel/sdk/metric/export package is renamed to Metadata.Attributes.
  Consequentially, the Record type from the same package also has had the embedded method renamed. (#2790)

Deprecated

• The Iterator.Label method in the go.opentelemetry.io/otel/attribute package is deprecated.
  Use the equivalent Iterator.Attribute method instead. (#2790)
• The Iterator.IndexedLabel method in the go.opentelemetry.io/otel/attribute package is deprecated.
  Use the equivalent Iterator.IndexedAttribute method instead. (#2790)
• The MergeIterator.Label method in the go.opentelemetry.io/otel/attribute package is deprecated.
  Use the equivalent MergeIterator.Attribute method instead. (#2790)

Removed

• Removed the Batch type from the go.opentelemetry.io/otel/sdk/metric/metrictest package. (#2864)
• Removed the Measurement type from the go.opentelemetry.io/otel/sdk/metric/metrictest package. (#2864)

Release metric/v0.29.0

0.29.0 - 2022-04-11

Added

• The metrics global package was added back into several test files. (#2764)
• The Meter function is added back to the go.opentelemetry.io/otel/metric/global package.
  This function is a convenience function equivalent to calling global.MeterProvider().Meter(...). (#2750)

Removed

• Removed module the go.opentelemetry.io/otel/sdk/export/metric.
  Use the go.opentelemetry.io/otel/sdk/metric module instead. (#2720)

Changed

• Don't panic anymore when setting a global MeterProvider to itself. (#2749)
• Upgrade go.opentelemetry.io/proto/otlp in go.opentelemetry.io/otel/exporters/otlp/otlpmetric from v0.12.1 to v0.15.0.
  This replaces the use of the now deprecated InstrumentationLibrary and InstrumentationLibraryMetrics types and fields in the proto library with the equivalent InstrumentationScope and ScopeMetrics. (#2748)

Release v1.6.3

Fixed

• Allow non-comparable global MeterProvider, TracerProvider, and TextMapPropagator types to be set. (#2772, #2773)

Release v1.6.2

1.6.2 - 2022-04-06

Changed

• Don't panic anymore when setting a global TracerProvider or TextMapPropagator to itself. (#2749)
• Upgrade go.opentelemetry.io/proto/otlp in go.opentelemetry.io/otel/exporters/otlp/otlptrace from v0.12.1 to v0.15.0.
  This replaces the use of the now deprecated InstrumentationLibrary and InstrumentationLibrarySpans types and fields in the proto library with the equivalent InstrumentationScope and ScopeSpans. (#2748)