Changelog

vNext

Bump msrv to 1.75.0.
Breaking opentelemetry::global::shutdown_tracer_provider() Removed from this crate, should now use tracer_provider.shutdown() see #2369 for a migration example.
Breaking Removed unused opentelemetry::PropagationError struct.

0.27.1

Released 2024-Nov-27

0.27.0

Released 2024-Nov-11

Bump MSRV to 1.70 #2179
Add LogRecord::set_trace_context; an optional method conditional on the trace feature for setting trace context on a log record.
Removed unnecessary public methods named as_any from AsyncInstrument trait and the implementing instruments: ObservableCounter, ObservableGauge, and ObservableUpDownCounter #2187
Introduced SyncInstrument trait to replace the individual synchronous instrument traits (SyncCounter, SyncGauge, SyncHistogram, SyncUpDownCounter) which are meant for SDK implementation. #2207
Ensured that observe method on asynchronous instruments can only be called inside a callback. This was done by removing the implementation of AsyncInstrument trait for each of the asynchronous instruments. #2210
Removed PartialOrd and Ord implementations for KeyValue. #2215
Breaking change for exporter authors: Marked KeyValue related structs and enums as non_exhaustive. #2228
Breaking change for log exporter authors: Marked AnyValue enum as non_exhaustive. #2230
Breaking change for Metrics users: The init method used to create instruments has been renamed to build. Also, try_init() method is removed from instrument builders. The return types of InstrumentProvider trait methods modified to return the instrument struct, instead of Result. #2227

Before:

let counter = meter.u64_counter("my_counter").init();

Now:

let counter = meter.u64_counter("my_counter").build();

Breaking change: #2220
- Removed deprecated method InstrumentationLibrary::new
- Renamed InstrumentationLibrary to InstrumentationScope
- Renamed InstrumentationLibraryBuilder to InstrumentationScopeBuilder
- Removed deprecated methods LoggerProvider::versioned_logger and TracerProvider::versioned_tracer
- Removed methods LoggerProvider::logger_builder, TracerProvider::tracer_builder and MeterProvider::versioned_meter
- Replaced these methods with LoggerProvider::logger_with_scope, TracerProvider::logger_with_scope, MeterProvider::meter_with_scope
- Replaced global::meter_with_version with global::meter_with_scope
- Added global::tracer_with_scope
- Refer to PR description for migration guide.
Breaking change: replaced InstrumentationScope public attributes by getters #2275
Breaking change: #2260
- Removed global::set_error_handler and global::handle_error.
- global::handle_error usage inside the opentelemetry crates has been replaced with global::otel_info, otel_warn, otel_debug and otel_error macros based on the severity of the internal logs.
- The default behavior of global::handle_error was to log the error using eprintln!. With otel macros, the internal logs get emitted via tracing macros of matching severity. Users now need to configure a tracing layer/subscriber to capture these logs.
- Refer to PR description for migration guide. Also refer to self-diagnostics example to learn how to view internal logs in stdout using tracing::fmt layer.
Breaking change for exporter/processor authors: #2266
- Moved ExportError trait from opentelemetry::ExportError to opentelemetry_sdk::export::ExportError
- Created new trait opentelemetry::trace::ExportError for trace API. This would be eventually be consolidated with ExportError in the SDK.
- Moved LogError enum from opentelemetry::logs::LogError to opentelemetry_sdk::logs::LogError
- Moved LogResult type alias from opentelemetry::logs::LogResult to opentelemetry_sdk::logs::LogResult
- Moved MetricError enum from opentelemetry::metrics::MetricError to opentelemetry_sdk::metrics::MetricError
- Moved MetricResult type alias from opentelemetry::metrics::MetricResult to opentelemetry_sdk::metrics::MetricResult These changes shouldn't directly affect the users of OpenTelemetry crate, as these constructs are used in SDK and Exporters. If you are an author of an sdk component/plug-in, like an exporter etc. please use these types from sdk. Refer CHANGELOG.md for more details, under same version section.
Breaking 2291 Rename logs_level_enabled flag to spec_unstable_logs_enabled. Please enable this updated flag if the feature is needed. This flag will be removed once the feature is stabilized in the specifications.

v0.26.0

Released 2024-Sep-30

BREAKING Public API changes:
- Removed: Key.bool(), Key.i64(), Key.f64(), Key.string(), Key.array() #2090. These APIs were redundant as they didn't offer any additional functionality. The existing KeyValue::new() API covers all the scenarios offered by these APIs.
- Removed: ObjectSafeMeterProvider and GlobalMeterProvider #2112. These APIs were unnecessary and were mainly meant for internal use.
- Modified: MeterProvider.meter() and MeterProvider.versioned_meter() argument types have been updated to &'static str instead of impl Into<Cow<'static, str>>> #2112. These APIs were modified to enforce the Meter name, version, and schema_url to be &'static str.
- Renamed: NoopMeterCore to NoopMeter
Added with_boundaries API to allow users to provide custom bounds for Histogram instruments. #2135

v0.25.0

BREAKING #1993 Box complex types in AnyValue enum Before:

#[derive(Debug, Clone, PartialEq)]
pub enum AnyValue {
    /// An integer value
    Int(i64),
    /// A double value
    Double(f64),
    /// A string value
    String(StringValue),
    /// A boolean value
    Boolean(bool),
    /// A byte array
    Bytes(Vec<u8>),
    /// An array of `Any` values
    ListAny(Vec<AnyValue>),
    /// A map of string keys to `Any` values, arbitrarily nested.
    Map(HashMap<Key, AnyValue>),
}

After:

#[derive(Debug, Clone, PartialEq)]
pub enum AnyValue {
    /// An integer value
    Int(i64),
    /// A double value
    Double(f64),
    /// A string value
    String(StringValue),
    /// A boolean value
    Boolean(bool),
    /// A byte array
    Bytes(Box<Vec<u8>>),
    /// An array of `Any` values
    ListAny(Box<Vec<AnyValue>>),
    /// A map of string keys to `Any` values, arbitrarily nested.
    Map(Box<HashMap<Key, AnyValue>>),
}

So the custom log appenders should box these types while adding them in message body, or attribute values. Similarly, the custom exporters should dereference these complex type values before serializing.

Breaking : #2015 Removed the ability to register callbacks for Observable instruments on Meter directly. If you were using meter.register_callback to provide the callback, provide them using with_callback method, while creating the Observable instrument itself. 1715 shows the exact changes needed to make this migration. If you are starting new, refer to the examples to learn how to provide Observable callbacks.

v0.24.0

Add "metrics", "logs" to default features. With this, default feature list is "trace", "metrics" and "logs".
When "metrics" feature is enabled, KeyValue implements PartialEq, Eq, PartialOrder, Order, Hash. This is meant to be used for metrics aggregation purposes only.
Removed Unit struct for specifying Instrument units. Unit is treated as an opaque string. Migration: Replace .with_unit(Unit::new("myunit")) with .with_unit("myunit").
1869 Introduced the LogRecord::set_target() method in the log bridge API. This method allows appenders to set the target/component emitting the logs.

v0.23.0

Added

#1640 Add PropagationError
#1701 Gauge no longer requires otel-unstable feature flag, as OpenTelemetry specification for Gauge instrument is stable.

Removed

Remove urlencoding crate dependency. #1613
Remove global providers for Logs $1691 LoggerProviders are not meant for end users to get loggers from. It is only required for the log bridges. Below global constructs for the logs are removed from API: - opentelemetry::global::logger - opentelemetry::global::set_logger_provider - opentelemetry::global::shutdown_logger_provider - opentelemetry::global::logger_provider - opentelemetry::global::GlobalLoggerProvider - opentelemetry::global::ObjectSafeLoggerProvider For creating appenders using Logging bridge API, refer to the opentelemetry-tracing-appender example

Changed

BREAKING Moving LogRecord implementation to the SDK. 1702.
- Relocated LogRecord struct to SDK.
- Introduced the LogRecord trait in the API for populating log records. This trait is implemented by the SDK. This is the breaking change for the authors of Log Appenders. Refer to the opentelemetry-appender-tracing for more details.
Deprecate versioned_logger() in favor of logger_builder() 1567.

Before:

let logger = provider.versioned_logger(
    "my-logger-name",
    Some(env!("CARGO_PKG_VERSION")),
    Some("https://opentelemetry.io/schema/1.0.0"),
    Some(vec![KeyValue::new("key", "value")]),
);

After:

let logger = provider
    .logger_builder("my-logger-name")
    .with_version(env!("CARGO_PKG_VERSION"))
    .with_schema_url("https://opentelemetry.io/schema/1.0.0")
    .with_attributes(vec![KeyValue::new("key", "value")])
    .build();

Deprecate versioned_tracer() in favor of tracer_builder() 1567.

Before:

let tracer = provider.versioned_tracer(
    "my-tracer-name",
    Some(env!("CARGO_PKG_VERSION")),
    Some("https://opentelemetry.io/schema/1.0.0"),
    Some(vec![KeyValue::new("key", "value")]),
);

After:

let tracer = provider
    .tracer_builder("my-tracer-name")
    .with_version(env!("CARGO_PKG_VERSION"))
    .with_schema_url("https://opentelemetry.io/schema/1.0.0")
    .with_attributes(vec![KeyValue::new("key", "value")])
    .build();

v0.22.0

Added

#1410 Add experimental synchronous gauge. This is behind the feature flag, and can be enabled by enabling the feature otel_unstable for opentelemetry crate.
#1410 Guidelines to add new unstable/experimental features.

Changed

Modified AnyValue.Map to be backed by HashMap instead of custom OrderMap, which internally used IndexMap. There was no requirement to maintain the order of entries, so moving from IndexMap to HashMap offers slight performance gains, and avoids IndexMap dependency. This affects body and attributes of LogRecord. #1353
Add TextMapCompositePropagator #1373
Turned off events for NoopLogger to save on operations #1455

Removed

Removed OrderMap type as there was no requirement to use this over regular HashMap. #1353
Remove API for Creating Histograms with signed integers. #1371
Remove global::shutdown_meter_provider, use SdkMeterProvider::shutdown directly instead #1412.

v0.21.0

This release should been seen as 1.0-rc4 following 1.0-rc3 in v0.20.0. Refer to CHANGELOG.md in individual creates for details on changes made in different creates.

Changed

Bump MSRV to 1.65 #1318
Bump MSRV to 1.64 #1203
opentelemetry crate now only carries the API types #1186. Use the opentelemetry_sdk crate for the SDK types.
trace::noop::NoopSpan no longer implements Default and instead exposes a const DEFAULT value. #1270
Updated crate documentation and examples. #1256
Breaking SpanBuilder attributes changed from OrderMap<Key, Value> to Vec<KeyValue> and with_attributes_map method is removed from SpanBuilder. This implies that OpenTelemetry API will no longer perform de-dup of attribute Keys. #1293. Please share feedback here, if you are affected.

v0.20.0

This release should been seen as 1.0-rc3 following 1.0-rc2 in v0.19.0. Refer to CHANGELOG.md in individual creates for details on changes made in different creates.

Added

Add new method to BoxedTracer #1009
Add js-sys as dependency for api crate when building wasm targets #1078
Create tracer using a shared instrumentation library #1129
Add Context::map_current #1140
Add unit/doc tests for metrics #1213
Add opentelemetry::sdk::logs::config() for parity with opentelemetry::sdk::trace::config() (#1197)

Changed

OtelString::Owned carries Box<str> instead of String #1096

Removed

Drop include_trace_context parameter from Logs API/SDK. #1133
Synchronous instruments no longer accepts Context while reporting measurements. #1076.
Fallible conversions from futures-channel error types to LogError and TraceError removed. #1201

Fixed

Fix SpanRef::set_attributes mutability requirement. #1038
Move OrderMap module to root of otel-api crate. #1061
Use the browser-only js-sys workaround only when actually targeting a browser #1008

v0.19.0

This release should been seen as 1.0-rc2 following 1.0-rc1 in v0.18.0. Refer to CHANGELOG.md in individual creates for details on changes made in different creates.

Added

Add WithContext to public api #893.
Add support for instrumentation scope attributes #1021.

Changed

Implement Display on Baggage #921.
Bump MSRV to 1.57 #953.
Update dependencies and bump MSRV to 1.60 #969.

v0.18.0

This release is the first beta release of the trace API and SDK. If no other breaking changes are necessary, the next release will be 1.0. The metrics API and SDK are still unstable.

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
Clone trait for noop tracer/tracer provider/span #479
Abstracted traits for different runtimes #480

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

v0.10.0

Added

Add support for baggage metadata #287

Changed

Remove api prefix from modules #305
Move mark_as_active_span and get_active_span functions into trace module #310
Revert renaming of SpanContext to SpanReference #299
Default trace propagator is now a no-op #329
Return references to span contexts instead of clones #325
Update exporter errors to be Box<dyn Error + Send + Sync + 'static> #284
Rename GenericProvider to GenericTracerProvider #313
Reduce SpanStatus enum to Ok, Error, and Unset variants #315
update B3 propagator to more closely match spec #319
Export missing pub global trace types #313
Ensure kv array values are homogeneous #333
Implement Display trait for Key and Value types #353
Move SpanProcessor trait into sdk module #334
Ensure is_recording is false and span is no-op after end #341
Move binary propagator and base64 format to contrib #343
Ensure metrics noop types go through constructors #345
Change ExportResult to use std::result::Result #347
Change SpanExporter::export to take &mut self instead of &self #350
Add MSRV 1.42.0 #296

Fixed

Fix parent based sampling #354

Removed

Remove support for u64 and bytes kv values #323
Remove kv value conversion from &str #332

v0.9.1

Added

Allow metric instruments to be cloned #280

Fixed

Fix single threaded runtime tokio feature bug #278

v0.9.0

Added

Add resource detector #174
Add fields method to TextMapFormat #178
Add support for tracestate in TraceContextPropagator #191
Propagate valid span context in noop tracer #197
Add end_with_timestamp method for trace span #199
Add ID methods for hex and byte array formatting #200
Add AWS X-Ray ID Generator #201
AWS X-Ray Trace Context Propagator #202
Add instrumentation library information to spans #207
Add keys method to extractors #209
Add TraceState to SpanContext #217
Add from_env config option for BatchSpanProcessor #228
Add pipeline uninstall mechanism to shut down trace pipelines #229

Changed

Re-write metrics sdk to be spec compliant #179
Rename Sampler::Probability to Sampler::TraceIdRatioBased #188
Rename HTTPTextPropagator to TextMapPropagator #192
Ensure extractors are case insensitive #193
Rename Provider to TracerProvider #206
Rename CorrelationContext into Baggage #208
Pipeline builder for stdout trace exporter #224
Switch to async exporters #232
Allow ShouldSample implementation to modify trace state #237
Ensure context guard is !Send #239
Ensure trace noop structs use new constructor #240
Switch to w3c baggage header #246
Move trace module imports from api to api::trace #255
Update tonic feature to use version 0.3.x #258
Update exporters to receive owned span data #264
Move propagators to sdk::propagation #266
Rename SpanContext to SpanReference #270
Rename SamplingDecision's NotRecord, Record and RecordAndSampled to Drop RecordOnly and RecordAndSample #247

v0.8.0

Added

Add custom span processors to Provider::Builder #166

Changed

Separate Carrier into Injector and Extractor #164
Change the default sampler to be ParentOrElse(AlwaysOn) #163
Move the Sampler interface to the SDK #169

v0.7.0

Added

New ParentOrElse sampler for fallback logic if parent is not sampled. #128
Attributes can now have array values #146
Added record_exception and record_exception_with_stacktrace methods to Span #152

Changed

Update sampler types #128
- Always is now AlwaysOn. Never is now AlwaysOff. Probability now ignores parent sampled state.
base64 and binary_propagator have been moved to experimental module. #134
Correlation-Context header has been updated to otcorrelations #145
B3Propagator has been updated to more closely follow the spec #148

v0.6.0

Added

Add http and tonic features to impl Carrier for common types.

Changed

Removed span_id from sampling parameters when implementing custom samplers.

Fixed

Make Context Send + Sync in #127

v0.5.0

Added

Derive Clone for B3Propagator, SamplingResult, and SpanBuilder
Ability to configure the span id / trace id generator
impl From<T> for common Key and Value types
Add global tracer method
Add Resource API
Add Context API
Add Correlations API
Add HttpTextCompositePropagator for composing HttpTextPropagators
Add GlobalPropagator for globally configuring a propagator
Add TraceContextExt to provide methods for working with trace data in a context
Expose EvictedQueue constructor

Changed

Ensure that impls of Span are Send and Sync when used in global
Changed Key and Value method signatures to remove Cow references
Tracer's start now uses the implicit current context instead of an explicit span context. start_with_context may be used to specify a context if desired.
with_span now accepts a span for naming consistency and managing the active state of a more complex span (likely produced by a builder), and the previous functionality that accepts a &str has been renamed to in_span, both of which now yield a context to the provided closure.
Tracer's get_active_span now accepts a closure
The Instrument trait has been renamed to FutureExt to avoid clashing with metric instruments, and instead accepts contexts via with_context.
Span's get_context method has been renamed to span_context to avoid ambiguity.
HttpTextPropagators inject the current context instead of an explicit span context. The context can be specified with inject_context.
SpanData's context has been renamed to span_context

Fixed

Update the probability sampler to match the spec
Rename Traceparent header to traceparent

Removed

TracerGenerics methods have been folded in to the Tracer trait so it is longer needed
Tracer's mark_span_as_inactive has been removed
Exporters no longer require an as_any method
Span's mark_as_active, mark_as_inactive, and as_any have been removed

v0.4.0

Added

New async batch span processor
New stdout exporter
Add trace_id to SpanBuilder

Changed

Add attributes to Events.
Update Span's add_event and add_event_with_timestamp to accept attributes.
Record log fields in jaeger exporter
Properly export span kind in jaeger exporter
Add support for Links
Add status_message to Span and SpanData
Rename SpanStatus to StatusCode
Update EvictedQueue internals from LIFO to FIFO
Switch span attributes to EvictedHashMap

Fixed

Call shutdown correctly when span processors and exporters are dropped

v0.3.0

Added

New Base64 propagator
New SpanBuilder api
Zipkin Exporter crate

Changed

Switch to SpanId and TraceId from u64 and u128
Remove &mut self requirements for Span API

Fixed

circular Tracer debug impl

v0.2.0

Added

Make trace and metrics features optional
ExportResult as specified in the specification
Add Futures compatibility API
Added serde serialise support to SpanData
Separate OpenTelemetry Jaeger crate

Changed

Rename HttpTraceContextPropagator to TraceContextPropagator
Rename HttpB3Propagator to B3Propagator
Switch to Apache 2 license
Resolve agent addresses to allow non-static IP
Remove tracer name prefix from span name

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