go.opentelemetry.io/otel/sdk

Added

• An EventOption and the related NewEventConfig function are added to the go.opentelemetry.io/otel package to configure Span events. (#1254)
• A TextMapPropagator and associated TextMapCarrier are added to the go.opentelemetry.io/otel/oteltest package to test TextMap type propagators and their use. (#1259)
• SpanContextFromContext returns SpanContext from context. (#1255)
• TraceState has been added to SpanContext. (#1340)
• DeploymentEnvironmentKey added to go.opentelemetry.io/otel/semconv package. (#1323)
• Add an OpenCensus to OpenTelemetry tracing bridge. (#1305)
• Add a parent context argument to SpanProcessor.OnStart to follow the specification. (#1333)
• Add missing tests for sdk/trace/attributes_map.go. (#1337)

Changed

• Move the go.opentelemetry.io/otel/api/trace package into go.opentelemetry.io/otel/trace with the following changes. (#1229) (#1307)
  • ID has been renamed to TraceID.
  • IDFromHex has been renamed to TraceIDFromHex.
  • EmptySpanContext is removed.
• Move the go.opentelemetry.io/otel/api/trace/tracetest package into go.opentelemetry.io/otel/oteltest. (#1229)
• OTLP Exporter updates:
  • supports OTLP v0.6.0 (#1230, #1354)
  • supports configurable aggregation temporality (default: Cumulative, optional: Stateless). (#1296)
• The Sampler is now called on local child spans. (#1233)
• The Kind type from the go.opentelemetry.io/otel/api/metric package was renamed to InstrumentKind to more specifically describe what it is and avoid semantic ambiguity. (#1240)
• The MetricKind method of the Descriptor type in the go.opentelemetry.io/otel/api/metric package was renamed to Descriptor.InstrumentKind. This matches the returned type and fixes misuse of the term metric. (#1240)
• Move test harness from the go.opentelemetry.io/otel/api/apitest package into go.opentelemetry.io/otel/oteltest. (#1241)
• Move the go.opentelemetry.io/otel/api/metric/metrictest package into go.opentelemetry.io/oteltest as part of #964. (#1252)
• Move the go.opentelemetry.io/otel/api/metric package into go.opentelemetry.io/otel/metric as part of #1303. (#1321)
• Move the go.opentelemetry.io/otel/api/metric/registry package into go.opentelemetry.io/otel/metric/registry as a part of #1303. (#1316)
• Move the Number type (together with related functions) from go.opentelemetry.io/otel/api/metric package into go.opentelemetry.io/otel/metric/number as a part of #1303. (#1316)
• The function signature of the Span AddEvent method in go.opentelemetry.io/otel is updated to no longer take an unused context and instead take a required name and a variable number of EventOptions. (#1254)
• The function signature of the Span RecordError method in go.opentelemetry.io/otel is updated to no longer take an unused context and instead take a required error value and a variable number of EventOptions. (#1254)
• Move the go.opentelemetry.io/otel/api/global package to go.opentelemetry.io/otel. (#1262) (#1330)
• Move the Version function from go.opentelemetry.io/otel/sdk to go.opentelemetry.io/otel. (#1330)
• Rename correlation context header from "otcorrelations" to "baggage" to match the OpenTelemetry specification. (#1267)
• Fix Code.UnmarshalJSON to work with valid JSON only. (#1276)
• The resource.New() method changes signature to support builtin attributes and functional options, including telemetry.sdk.* and host.name semantic conventions; the former method is renamed resource.NewWithAttributes. (#1235)
• The Prometheus exporter now exports non-monotonic counters (i.e. UpDownCounters) as gauges. (#1210)
• Correct the Span.End method documentation in the otel API to state updates are not allowed on a span after it has ended. (#1310)
• Updated span collection limits for attribute, event and link counts to 1000 (#1318)
• Renamed semconv.HTTPUrlKey to semconv.HTTPURLKey. (#1338)

Removed

• The ErrInvalidHexID, ErrInvalidTraceIDLength, ErrInvalidSpanIDLength, ErrInvalidSpanIDLength, or ErrNilSpanID from the go.opentelemetry.io/otel package are unexported now. (#1243)
• The AddEventWithTimestamp method on the Span interface in go.opentelemetry.io/otel is removed due to its redundancy. It is replaced by using the AddEvent method with a WithTimestamp option. (#1254)
• The MockSpan and MockTracer types are removed from go.opentelemetry.io/otel/oteltest. Tracer and Span from the same module should be used in their place instead. (#1306)
• WorkerCount option is removed from go.opentelemetry.io/otel/exporters/otlp. (#1350)
• Remove the following labels types: INT32, UINT32, UINT64 and FLOAT32. (#1314)

Fixed

• Rename MergeItererator to MergeIterator in the go.opentelemetry.io/otel/label package. (#1244)
• The go.opentelemetry.io/otel/api/global packages global TextMapPropagator now delegates functionality to a globally set delegate for all previously returned propagators. (#1258)
• Fix condition in label.Any. (#1299)
• Fix global TracerProvider to pass options to its configured provider. (#1329)
• Fix missing handler for ExactKind aggregator in OTLP metrics transformer (#1309)