v0.18.0

Added

• Pull sampling probability from OTEL_TRACES_SAMPLER_ARG in default sdk config #737
• Add schema_url to Tracer #743
• Add schema_url to Resource #775
• Add Span::set_attributes #638
• Support concurrent exports #781
• Add jaeger remote sampler #797
• Allow Custom Samplers #833
• Add SpanExporter::force_flush and default implementation #845

Changed

• Deprecate metrics ValueRecorder in favor of Histogram #728
• Move IdGenerator to SDK, rename to RandomIdGenerator #742
• meter_with_version accepts optional parameter for version and schema_url #752
• Unify Event and Link access patterns #757
• move SpanKind display format impl to jaeger crate #758
• make TraceStateError private #755
• rename Span::record_exception to Span::record_error #756
• Replace StatusCode and message with Status #760
• Move TracerProvider::force_flush to SDK #658
• Switch to static resource references #790
• Allow O(1) get operations for SpanBuilder::attributes [breaking] #799
• Allow ref counted keys and values #821
• Bump MSRV from 1.49 to 1.55 #811
• bump MSRV to 1.56 #866
• Update metrics API and SDK for latest spec #819
• Switch to pin-project-lite #830

Fixed

• Update dashmap to avoid soundness hole #818
• Perform sampling as explained in the specification #839
• Remove internal message queue between exporter and exporting tasks #848
• Fix span processor exporting unsampled spans #871

Removed

• Remove serialize feature #738
• Remove StatusCode::as_str #741
• Remove Tracer::with_span #746

v0.17.0

Changed

• Implement Serialize & Deserialize for Sampler, SpanLimits #622, #626
• Allow &'static str and string in span methods #654
• Allow String data in instrumentation library. #670
• Remove std::fmt::Debug and 'static requirements from TracerProvider,
  Tracer, and Span #664
• Remove unused Tracer::invalid method #683
• Split TracerProvider::tracer and TracerProvider::versioned_tracer methods #682
• Reduce dependency on futures crate #684
• Switch to parent context references #687
• Spec-compliant trace and span ids #689
• Optimize span creation internals #693
• Add instrumentation library to ShouldSample parameters #695

Fixed

• Fix default resource detection for tracer provider #641
• Detect service.name from OTEL_SERVICE_NAME and OTEL_RESOURCE_ATTRIBUTES #662
• Fix TraceState::valid_key crashes #665

v0.16.0

Changed

• Add default resource in TracerProvider #571
• Rename get_tracer to tracer #586
• Extract trace::noop module and update docs #587
• Add Hash impl for span context and allow spans to clone and export current state #592
• Enforce span status code's order #593
• Make SpanRef public #600
• Make SpanProcessor::on_start take a mutable span #601
• Renamed label to attribute to align with otel specification #609

Performance

• Small performance boost for Resource::get #579

v0.15.0

Added

• More resource detectors #573

Changed

• Expose the Error type to allow users to set custom error handlers #551
• Allow users to use different channels based on runtime in batch span processor #560
• Move Unit into metrics module #564
• Update trace flags to match spec #565

Fixed

• Fix debug loop, add notes for #[tokio::test] #552
• TraceState cannot insert new key-value pairs #567

v0.14.0

Added

• Adding a dynamic dispatch to Aggregator Selector #497
• Add global::force_flush_tracer_provider #512
• Add config max_attributes_per_event and max_attributes_per_link #521
• Add dropped attribute counts to events and links #529

Changed

• Remove unnecessary clone in Key type #491
• Remove #[must_use] from set_tracer_provider #501
• Rename remaining usage of default_sampler to sampler #509
• Use current span for SDK-less context propagation #510
• Always export span batch when limit reached #519
• Rename message events to events #530
• Update resource merge behaviour #537
• Ignore links with invalid context #538

Removed

• Remove remote span context #508
• Remove metrics quantiles #525

Fixed

• Allow users to use custom export kind selector #526

Performance

• Improve simple span processor performance #502
• Local span perf improvements #505
• Reduce string allocations where possible #506

v0.13.0

Upgrade note: exporter pipelines do not return an uninstall guard as of #444, use opentelemetry::global::shutdown_tracer_provider explicitly instead.

Changed

• Pull configrations from environment variables by default when creating BatchSpanProcessor #445
• Convert doc links to intra-doc #466
• Switch to Cow for event names #471
• Use API to configure async runtime instead of features #481
• Rename trace config with_default_sampler to with_sampler #482

Removed

• Removed tracer provider guard #444
• Removed from_env and use environment variables to initialize the configurations by default #459

v0.12.0

Added

• Instrumentation library support #402
• Batch observer support #429
• with_unit methods in metrics #431

Changed

• Dependencies updates #410
• Add Send, Sync to AsyncInstrument in metrics #422
• Add Send, Sync to InstrumentCore in metrics #423
• Replace regex with custom logic #411
• Update tokio to v1 #421

Removed

• Moved http dependencies into a new opentelemetry-http crate #415
• Remove tonic dependency #414

v0.11.2

Fixed

• Fix possible deadlock when dropping metric instruments #407

v0.11.1

Fixed

• Fix remote implicit builder context sampling #405

v0.11.0

Added

• Add force_flush method to span processors #358
• Add timeout for force_flush and shutdown #362

Changed

• Implement Display trait for Key and Value types #353
• Remove Option from Array values #359
• Update ShouldSample's parent parameter to be Context #368
• Consolidate error types in trace module into TraceError #371
• Add #[must_use] to uninstall structs #372
• Move 3rd party propagators and merge exporter into sdk::export #375
• Add instrumentation version to instrument config #392
• Use instrumentation library in metrics #393
• start_from_context renamed to start_with_context #399
• Removed build_with_context as full context is now stored in builder #399
• SpanBuilder's with_parent renamed to with_parent_context #399

Fixed

• Fix parent based sampling in tracer #354
• StatusCode enum value ordering #377
• Counter adding the delta from last collection #395
• HistogramAggregator returning sum vs count #398