go.opentelemetry.io/otel/metric

Added

• Attribute KeyValue creations functions to go.opentelemetry.io/otel/semconv/v1.17.0 for all non-enum semantic conventions. These functions ensure semantic convention type correctness. (#3675)

Fixed

• Removed the http.target attribute from being added by ServerRequest in the following packages. (#3687)
  • go.opentelemetry.io/otel/semconv/v1.13.0/httpconv
  • go.opentelemetry.io/otel/semconv/v1.14.0/httpconv
  • go.opentelemetry.io/otel/semconv/v1.15.0/httpconv
  • go.opentelemetry.io/otel/semconv/v1.16.0/httpconv
  • go.opentelemetry.io/otel/semconv/v1.17.0/httpconv

Removed

• The deprecated go.opentelemetry.io/otel/metric/instrument/asyncfloat64 package is removed. (#3631)
• The deprecated go.opentelemetry.io/otel/metric/instrument/asyncint64 package is removed. (#3631)
• The deprecated go.opentelemetry.io/otel/metric/instrument/syncfloat64 package is removed. (#3631)
• The deprecated go.opentelemetry.io/otel/metric/instrument/syncint64 package is removed. (#3631)

Added

• The WithInt64Callback option to go.opentelemetry.io/otel/metric/instrument. This options is used to configure int64 Observer callbacks during their creation. (#3507)
• The WithFloat64Callback option to go.opentelemetry.io/otel/metric/instrument. This options is used to configure float64 Observer callbacks during their creation. (#3507)
• The Producer interface and Reader.RegisterProducer(Producer) to go.opentelemetry.io/otel/sdk/metric. These additions are used to enable external metric Producers. (#3524)
• The Callback function type to go.opentelemetry.io/otel/metric. This new named function type is registered with a Meter. (#3564)
• The go.opentelemetry.io/otel/semconv/v1.13.0 package. The package contains semantic conventions from the v1.13.0 version of the OpenTelemetry specification. (#3499)
  • The EndUserAttributesFromHTTPRequest function in go.opentelemetry.io/otel/semconv/v1.12.0 is merged into ClientRequest and ServerRequest in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The HTTPAttributesFromHTTPStatusCode function in go.opentelemetry.io/otel/semconv/v1.12.0 is merged into ClientResponse in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The HTTPClientAttributesFromHTTPRequest function in go.opentelemetry.io/otel/semconv/v1.12.0 is replaced by ClientRequest in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The HTTPServerAttributesFromHTTPRequest function in go.opentelemetry.io/otel/semconv/v1.12.0 is replaced by ServerRequest in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The HTTPServerMetricAttributesFromHTTPRequest function in go.opentelemetry.io/otel/semconv/v1.12.0 is replaced by ServerRequest in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The NetAttributesFromHTTPRequest function in go.opentelemetry.io/otel/semconv/v1.12.0 is split into Transport in go.opentelemetry.io/otel/semconv/v1.13.0/netconv and ClientRequest or ServerRequest in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The SpanStatusFromHTTPStatusCode function in go.opentelemetry.io/otel/semconv/v1.12.0 is replaced by ClientStatus in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The SpanStatusFromHTTPStatusCodeAndSpanKind function in go.opentelemetry.io/otel/semconv/v1.12.0 is split into ClientStatus and ServerStatus in go.opentelemetry.io/otel/semconv/v1.13.0/httpconv.
  • The Client function is included in go.opentelemetry.io/otel/semconv/v1.13.0/netconv to generate attributes for a net.Conn.
  • The Server function is included in go.opentelemetry.io/otel/semconv/v1.13.0/netconv to generate attributes for a net.Listener.
• The go.opentelemetry.io/otel/semconv/v1.14.0 package. The package contains semantic conventions from the v1.14.0 version of the OpenTelemetry specification. (#3566)
• The go.opentelemetry.io/otel/semconv/v1.15.0 package. The package contains semantic conventions from the v1.15.0 version of the OpenTelemetry specification. (#3578)
• The go.opentelemetry.io/otel/semconv/v1.16.0 package. The package contains semantic conventions from the v1.16.0 version of the OpenTelemetry specification. (#3579)
• Metric instruments to go.opentelemetry.io/otel/metric/instrument. These instruments are use as replacements of the deprecated go.opentelemetry.io/otel/metric/instrument/{asyncfloat64,asyncint64,syncfloat64,syncint64} packages.(#3575, #3586)
  • Float64ObservableCounter replaces the asyncfloat64.Counter
  • Float64ObservableUpDownCounter replaces the asyncfloat64.UpDownCounter
  • Float64ObservableGauge replaces the asyncfloat64.Gauge
  • Int64ObservableCounter replaces the asyncint64.Counter
  • Int64ObservableUpDownCounter replaces the asyncint64.UpDownCounter
  • Int64ObservableGauge replaces the asyncint64.Gauge
  • Float64Counter replaces the syncfloat64.Counter
  • Float64UpDownCounter replaces the syncfloat64.UpDownCounter
  • Float64Histogram replaces the syncfloat64.Histogram
  • Int64Counter replaces the syncint64.Counter
  • Int64UpDownCounter replaces the syncint64.UpDownCounter
  • Int64Histogram replaces the syncint64.Histogram
• NewTracerProvider to go.opentelemetry.io/otel/bridge/opentracing. This is used to create WrapperTracer instances from a TracerProvider. (#3116)
• The Extrema type to go.opentelemetry.io/otel/sdk/metric/metricdata. This type is used to represent min/max values and still be able to distinguish unset and zero values. (#3487)
• The go.opentelemetry.io/otel/semconv/v1.17.0 package. The package contains semantic conventions from the v1.17.0 version of the OpenTelemetry specification. (#3599)

Changed

• Jaeger and Zipkin exporter use github.com/go-logr/logr as the logging interface, and add the WithLogr option. (#3497, #3500)
• Instrument configuration in go.opentelemetry.io/otel/metric/instrument is split into specific options and configuration based on the instrument type. (#3507)
  • Use the added Int64Option type to configure instruments from go.opentelemetry.io/otel/metric/instrument/syncint64.
  • Use the added Float64Option type to configure instruments from go.opentelemetry.io/otel/metric/instrument/syncfloat64.
  • Use the added Int64ObserverOption type to configure instruments from go.opentelemetry.io/otel/metric/instrument/asyncint64.
  • Use the added Float64ObserverOption type to configure instruments from go.opentelemetry.io/otel/metric/instrument/asyncfloat64.
• Return a Registration from the RegisterCallback method of a Meter in the go.opentelemetry.io/otel/metric package. This Registration can be used to unregister callbacks. (#3522)
• Global error handler uses an atomic value instead of a mutex. (#3543)
• Add NewMetricProducer to go.opentelemetry.io/otel/bridge/opencensus, which can be used to pass OpenCensus metrics to an OpenTelemetry Reader. (#3541)
• Global logger uses an atomic value instead of a mutex. (#3545)
• The Shutdown method of the "go.opentelemetry.io/otel/sdk/trace".TracerProvider releases all computational resources when called the first time. (#3551)
• The Sampler returned from TraceIDRatioBased go.opentelemetry.io/otel/sdk/trace now uses the rightmost bits for sampling decisions. This fixes random sampling when using ID generators like xray.IDGenerator and increasing parity with other language implementations. (#3557)
• Errors from go.opentelemetry.io/otel/exporters/otlp/otlptrace exporters are wrapped in errors identifying their signal name. Existing users of the exporters attempting to identify specific errors will need to use errors.Unwrap() to get the underlying error. (#3516)
• Exporters from go.opentelemetry.io/otel/exporters/otlp will print the final retryable error message when attempts to retry time out. (#3514)
• The instrument kind names in go.opentelemetry.io/otel/sdk/metric are updated to match the API. (#3562)
  • InstrumentKindSyncCounter is renamed to InstrumentKindCounter
  • InstrumentKindSyncUpDownCounter is renamed to InstrumentKindUpDownCounter
  • InstrumentKindSyncHistogram is renamed to InstrumentKindHistogram
  • InstrumentKindAsyncCounter is renamed to InstrumentKindObservableCounter
  • InstrumentKindAsyncUpDownCounter is renamed to InstrumentKindObservableUpDownCounter
  • InstrumentKindAsyncGauge is renamed to InstrumentKindObservableGauge
• The RegisterCallback method of the Meter in go.opentelemetry.io/otel/metric changed.
  • The named Callback replaces the inline function parameter. (#3564)
  • Callback is required to return an error. (#3576)
  • Callback accepts the added Observer parameter added. This new parameter is used by Callback implementations to observe values for asynchronous instruments instead of calling the Observe method of the instrument directly. (#3584)
  • The slice of instrument.Asynchronous is now passed as a variadic argument. (#3587)
• The exporter from go.opentelemetry.io/otel/exporters/zipkin is updated to use the v1.16.0 version of semantic conventions. This means it no longer uses the removed net.peer.ip or http.host attributes to determine the remote endpoint. Instead it uses the net.sock.peer attributes. (#3581)
• The Min and Max fields of the HistogramDataPoint in go.opentelemetry.io/otel/sdk/metric/metricdata are now defined with the added Extrema type instead of a *float64. (#3487)

Fixed

• Asynchronous instruments that use sum aggregators and attribute filters correctly add values from equivalent attribute sets that have been filtered. (#3439, #3549)
• The RegisterCallback method of the Meter from go.opentelemetry.io/otel/sdk/metric only registers a callback for instruments created by that meter. Trying to register a callback with instruments from a different meter will result in an error being returned. (#3584)

Deprecated

• The NewMetricExporter in go.opentelemetry.io/otel/bridge/opencensus is deprecated. Use NewMetricProducer instead. (#3541)
• The go.opentelemetry.io/otel/metric/instrument/asyncfloat64 package is deprecated. Use the instruments from go.opentelemetry.io/otel/metric/instrument instead. (#3575)
• The go.opentelemetry.io/otel/metric/instrument/asyncint64 package is deprecated. Use the instruments from go.opentelemetry.io/otel/metric/instrument instead. (#3575)
• The go.opentelemetry.io/otel/metric/instrument/syncfloat64 package is deprecated. Use the instruments from go.opentelemetry.io/otel/metric/instrument instead. (#3575)
• The go.opentelemetry.io/otel/metric/instrument/syncint64 package is deprecated. Use the instruments from go.opentelemetry.io/otel/metric/instrument instead. (#3575)
• The NewWrappedTracerProvider in go.opentelemetry.io/otel/bridge/opentracing is now deprecated. Use NewTracerProvider instead. (#3116)

Removed

• The deprecated go.opentelemetry.io/otel/sdk/metric/view package is removed. (#3520)
• The InstrumentProvider from go.opentelemetry.io/otel/sdk/metric/asyncint64 is removed. Use the new creation methods of the Meter in go.opentelemetry.io/otel/sdk/metric instead. (#3530)
  • The Counter method is replaced by Meter.Int64ObservableCounter
  • The UpDownCounter method is replaced by Meter.Int64ObservableUpDownCounter
  • The Gauge method is replaced by Meter.Int64ObservableGauge
• The InstrumentProvider from go.opentelemetry.io/otel/sdk/metric/asyncfloat64 is removed. Use the new creation methods of the Meter in go.opentelemetry.io/otel/sdk/metric instead. (#3530)
  • The Counter method is replaced by Meter.Float64ObservableCounter
  • The UpDownCounter method is replaced by Meter.Float64ObservableUpDownCounter
  • The Gauge method is replaced by Meter.Float64ObservableGauge
• The InstrumentProvider from go.opentelemetry.io/otel/sdk/metric/syncint64 is removed. Use the new creation methods of the Meter in go.opentelemetry.io/otel/sdk/metric instead. (#3530)
  • The Counter method is replaced by Meter.Int64Counter
  • The UpDownCounter method is replaced by Meter.Int64UpDownCounter
  • The Histogram method is replaced by Meter.Int64Histogram
• The InstrumentProvider from go.opentelemetry.io/otel/sdk/metric/syncfloat64 is removed. Use the new creation methods of the Meter in go.opentelemetry.io/otel/sdk/metric instead. (#3530)
  • The Counter method is replaced by Meter.Float64Counter
  • The UpDownCounter method is replaced by Meter.Float64UpDownCounter
  • The Histogram method is replaced by Meter.Float64Histogram

Added

• The WithView Option is added to the go.opentelemetry.io/otel/sdk/metric package. This option is used to configure the view(s) a MeterProvider will use for all Readers that are registered with it. (#3387)
• Add Instrumentation Scope and Version as info metric and label in Prometheus exporter. This can be disabled using the WithoutScopeInfo() option added to that package.(#3273, #3357)
• OTLP exporters now recognize: (#3363)
  • OTEL_EXPORTER_OTLP_INSECURE
  • OTEL_EXPORTER_OTLP_TRACES_INSECURE
  • OTEL_EXPORTER_OTLP_METRICS_INSECURE
  • OTEL_EXPORTER_OTLP_CLIENT_KEY
  • OTEL_EXPORTER_OTLP_TRACES_CLIENT_KEY
  • OTEL_EXPORTER_OTLP_METRICS_CLIENT_KEY
  • OTEL_EXPORTER_OTLP_CLIENT_CERTIFICATE
  • OTEL_EXPORTER_OTLP_TRACES_CLIENT_CERTIFICATE
  • OTEL_EXPORTER_OTLP_METRICS_CLIENT_CERTIFICATE
• The View type and related NewView function to create a view according to the OpenTelemetry specification are added to go.opentelemetry.io/otel/sdk/metric. These additions are replacements for the View type and New function from go.opentelemetry.io/otel/sdk/metric/view. (#3459)
• The Instrument and InstrumentKind type are added to go.opentelemetry.io/otel/sdk/metric. These additions are replacements for the Instrument and InstrumentKind types from go.opentelemetry.io/otel/sdk/metric/view. (#3459)
• The Stream type is added to go.opentelemetry.io/otel/sdk/metric to define a metric data stream a view will produce. (#3459)
• The AssertHasAttributes allows instrument authors to test that datapoints returned have appropriate attributes. (#3487)

Changed

• The "go.opentelemetry.io/otel/sdk/metric".WithReader option no longer accepts views to associate with the Reader. Instead, views are now registered directly with the MeterProvider via the new WithView option. The views registered with the MeterProvider apply to all Readers. (#3387)
• The Temporality(view.InstrumentKind) metricdata.Temporality and Aggregation(view.InstrumentKind) aggregation.Aggregation methods are added to the "go.opentelemetry.io/otel/sdk/metric".Exporter interface. (#3260)
• The Temporality(view.InstrumentKind) metricdata.Temporality and Aggregation(view.InstrumentKind) aggregation.Aggregation methods are added to the "go.opentelemetry.io/otel/exporters/otlp/otlpmetric".Client interface. (#3260)
• The WithTemporalitySelector and WithAggregationSelector ReaderOptions have been changed to ManualReaderOptions in the go.opentelemetry.io/otel/sdk/metric package. (#3260)
• The periodic reader in the go.opentelemetry.io/otel/sdk/metric package now uses the temporality and aggregation selectors from its configured exporter instead of accepting them as options. (#3260)

Fixed

• The go.opentelemetry.io/otel/exporters/prometheus exporter fixes duplicated _total suffixes. (#3369)
• Remove comparable requirement for Readers. (#3387)
• Cumulative metrics from the OpenCensus bridge (go.opentelemetry.io/otel/bridge/opencensus) are defined as monotonic sums, instead of non-monotonic. (#3389)
• Asynchronous counters (Counter and UpDownCounter) from the metric SDK now produce delta sums when configured with delta temporality. (#3398)
• Exported Status codes in the go.opentelemetry.io/otel/exporters/zipkin exporter are now exported as all upper case values. (#3340)
• Aggregations from go.opentelemetry.io/otel/sdk/metric with no data are not exported. (#3394, #3436)
• Re-enabled Attribute Filters in the Metric SDK. (#3396)
• Asynchronous callbacks are only called if they are registered with at least one instrument that does not use drop aggregation. (#3408)
• Do not report empty partial-success responses in the go.opentelemetry.io/otel/exporters/otlp exporters. (#3438, #3432)
• Handle partial success responses in go.opentelemetry.io/otel/exporters/otlp/otlpmetric exporters. (#3162, #3440)
• Prevent duplicate Prometheus description, unit, and type. (#3469)
• Prevents panic when using incorrect attribute.Value.As[Type]Slice(). (#3489)

Removed

• The go.opentelemetry.io/otel/exporters/otlp/otlpmetric.Client interface is removed. (#3486)
• The go.opentelemetry.io/otel/exporters/otlp/otlpmetric.New function is removed. Use the otlpmetric[http|grpc].New directly. (#3486)

Deprecated

• The go.opentelemetry.io/otel/sdk/metric/view package is deprecated. Use Instrument, InstrumentKind, View, and NewView in go.opentelemetry.io/otel/sdk/metric instead. (#3476)