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Changelog

vNext

Changed

  • Breaking #1313 #1350 Changes how Span links/events are stored to achieve performance gains. See below for details:

    Behavior Change: When enforcing max_links_per_span, max_events_per_span from SpanLimits, links/events are kept in the first-come order. The previous "eviction" based approach is no longer performed.

    Breaking Change Affecting Exporter authors:

    SpanData now stores links as SpanLinks instead of EvictedQueue where SpanLinks is a struct with a Vec of links and dropped_count.

    SpanData now stores events as SpanEvents instead of EvictedQueue where SpanEvents is a struct with a Vec of events and dropped_count.

v0.21.0

Added

  • Log warning if two instruments have the same name with different (#1266) casing
  • Log warning if view is created with empty criteria (#1266)
  • Add exponential histogram support (#1267)
  • Add opentelemetry::sdk::logs::config() for parity with opentelemetry::sdk::trace::config() (#1197)

Changed

  • Bump MSRV to 1.65 #1318

  • Default Resource (the one used when no other Resource is explicitly provided) now includes TelemetryResourceDetector, populating "telemetry.sdk.*" attributes. #1066.

  • Bump MSRV to 1.64 #1203

  • Add unit/doc tests for MeterProvider #1220

  • Changed dependency from opentelemetry_api to opentelemetry as the latter is now the API crate. #1226

  • Add in memory span exporter #1216

  • Add in memory log exporter #1231

  • Add Sync bound to the SpanExporter and LogExporter traits #1240

  • Move MetricsProducer config to builders to match other config (#1266)

  • Return error earlier if readers are shut down (#1266)

  • Add / to valid characters for instrument names (#1269)

  • Increase instrument name maximum length from 63 to 255 (#1269)

  • Updated crate documentation and examples. #1256

  • Replace regex with glob (#1301)

  • Breaking #1293 makes few breaking changes with respect to how Span attributes are stored to achieve performance gains. See below for details:

    Behavior Change:

    SDK will no longer perform de-duplication of Span attribute Keys. Please share feedback here, if you are affected.

    Breaking Change Affecting Exporter authors:

    SpanData now stores attributes as Vec<KeyValue> instead of EvictedHashMap. SpanData now expose dropped_attributes_count as a separate field.

    Breaking Change Affecting Sampler authors:

    should_sample changes attributes from OrderMap<Key, Value> to Vec<KeyValue>.

  • Breaking Move type argument from RuntimeChannel<T> to associated types #1314

Removed

  • Remove context from Metric force_flush #1245
  • Remove logs::BatchMessage and trace::BatchMessage types #1314

Fixed

  • Fix metric instrument name validation to include _ #1030

v0.20.0

Added

  • Implement cardinality limits for metric streams #1066.
  • Propagate shutdown calls from PeriodicReader to metrics exporter #1138.
  • Add in memory metrics exporter #1017

Changed

  • New metrics SDK #1000
  • Use Cow<'static, str> instead of &'static str #1018
  • Unify trace and logs runtime extensions traits. #1067

Changed

  • Fix EvictedQueue bug when capacity is set to 0 #1151.

Removed

  • Samplers no longer has access to InstrumentationLibrary as one of parameters to should_sample. #1041.
  • Synchronous instruments no longer accepts Context while reporting measurements. #1076.
  • Don't use CARGO_BIN_NAME for service name #1150

Fixed

  • Wait for exports on the simple span processor's ForceFlush #1030

v0.19.0

Added

  • Add instrument validation to InstrumentBuilder #884.
  • Add TelemetryResourceDetector #899.
  • Add support for instrumentation scope attributes #1021.

Changed

  • Update to opentelemetry_api v0.19.
  • Update to opentelemetry_http v0.8.
  • Bump MSRV to 1.57 #953.
  • Fix doc in ShouldSample trait #951
  • Only run ParentBased delegate sampler when there is no parent #948.
  • Improve SdkProvidedResourceDetector's doc #964.
  • Update dependencies and bump MSRV to 1.60 #969.
  • Use CARGO_BIN_NAME as default service name #991.

Removed

  • Remove in_memory settings #946.

main

Changed

  • Update the Number in the SDK API to support min and max. #989

v0.18.0

Changed

  • BREAKING structs which implement ShouldSample a.k.a Custom Samplers must now implement Clone. This enables (#833)
  • SDK split from opentelemetry crate