CHANGELOG.md

Changelog

vNext

• Add "metrics", "logs" to default features. With this, default feature list is "trace", "metrics" and "logs".

• Add with_resource on Builder for LoggerProvider, replacing the with_config method. Instead of using .with_config(Config::default().with_resource(RESOURCE::default())) users must now use .with_resource(RESOURCE::default()) to configure Resource on logger provider.

• Removed dependency on ordered-float.

• Removed XrayIdGenerator, which was marked deprecated since 0.21.3. Use opentelemetry-aws, version 0.10.0 or newer.

• Performance Improvement - Counter/UpDownCounter instruments internally use RwLock instead of Mutex to reduce contention

• Breaking 1726 Update LogProcessor::emit() method to take mutable reference to LogData. This is breaking change for LogProcessor developers. If the processor needs to invoke the exporter asynchronously, it should clone the data to ensure it can be safely processed without lifetime issues. Any changes made to the log data before cloning in this method will be reflected in the next log processor in the chain, as well as to the exporter.

• Breaking 1726 Update LogExporter::export() method to accept a batch of log data, which can be either a reference or ownedLogData. If the exporter needs to process the log data asynchronously, it should clone the log data to ensure it can be safely processed without lifetime issues.

• Clean up public methods in SDK.

  • [TracerProvider::span_processors] and [TracerProvider::config] was removed as it's not part of the spec.
  • Added non_exhaustive annotation to [trace::Config]. Marked [config] as deprecated since it's only a wrapper for Config::default
  • Removed [Tracer::tracer_provder] and [Tracer::instrument_libraries] as it's not part of the spec.

• Breaking #1830 [Traces SDK] Improves performance by sending Resource information to processors (and exporters) once, instead of sending with every log. If you are an author of Processor, Exporter, the following are BREAKING changes.

  • Implement set_resource method in your custom SpanProcessor, which invokes exporter's set_resource.
  • Implement set_resource method in your custom SpanExporter. This method should save the resource object in original or serialized format, to be merged with every span event during export.
  • SpanData doesn't have the resource attributes. The SpanExporter::export() method needs to merge it with the earlier preserved resource before export.

• Breaking 1836 SpanProcessor::shutdown now takes an immutable reference to self. Any reference can call shutdown on the processor. After the first call to shutdown the processor will not process any new spans.

• Breaking [1850] (open-telemetry#1850) LoggerProvider::log_processors() and LoggerProvider::resource() are not public methods anymore. They are only used within the opentelemetry-sdk crate.

• 1857 Fixed an issue in Metrics SDK which prevented export errors from being send to global error handler. With the fix, errors occurring during export like OTLP Endpoint unresponsive shows up in stderr by default.

• 1869 Added a target field to LogRecord structure, populated by opentelemetry-appender-tracing and opentelemetry-appender-log appenders.

async fn export<'a>(&mut self, batch: Vec<Cow<'a, LogData>>) -> LogResult<()>;

where LogRecord within LogData now includes:

LogData {
  LogRecord {
    event_name,
    target,  // newly added
    timestamp,
    observed_timestamp,
    trace_context,
    trace_context,
    severity_number,
    body,
    attributes
  }
  Instrumentation {
    name,
    version,
    schema_url,
    version
  }
}

The LogRecord::target field contains the actual target/component emitting the logs, while the Instrumentation::name contains the name of the OpenTelemetry appender.

v0.23.0

• Fix SimpleSpanProcessor to be consistent with log counterpart. Also removed dependency on crossbeam-channel. 1612
• #1422 Fix metrics aggregation bug when using Views to drop attributes.
• #1766 Fix Metrics PeriodicReader to trigger first collect/export at the first interval instead of doing it right away.
• #1623 Add Drop implementation for SdkMeterProvider, which shuts down metricreaders, thereby allowing metrics still in memory to be flushed out.
• Breaking #1624 Remove OsResourceDetector and ProcessResourceDetector resource detectors, use the opentelemetry-resource-detector instead.
• #1636 [Logs SDK] Improves performance by sending Resource information to processors (and exporters) once, instead of sending with every log. If you are an author of Processor, Exporter, the following are BREAKING changes.
  • Implement set_resource method in your custom LogProcessor, which invokes exporter's set_resource.
  • Implement set_resource method in your custom LogExporter. This method should save the resource object in original or serialized format, to be merged with every log event during export.
  • LogData doesn't have the resource attributes. The LogExporter::export() method needs to merge it with the earlier preserved resource before export.
• Baggage propagation error will be reported to global error handler #1640
• Improves shutdown behavior of LoggerProvider and LogProcessor #1643.
  • shutdown can be called by any clone of the LoggerProvider without the need of waiting on all Logger drops. Thus, try_shutdown has been removed.
  • shutdown methods in LoggerProvider and LogProcessor now takes a immutable reference
  • After shutdown, LoggerProvider will return noop Logger
  • After shutdown, LogProcessor will not process any new logs
• Moving LogRecord implementation to the SDK. 1702.
  • Relocated LogRecord struct to SDK, as an implementation for the trait in the API.
• Breaking #1729
  • Update the return type of TracerProvider.span_processors() from &Vec<Box<dyn SpanProcessor>> to &[Box<dyn SpanProcessor>].
  • Update the return type of LoggerProvider.log_processors() from &Vec<Box<dyn LogProcessor>> to &[Box<dyn LogProcessor>].
• Update opentelemetry dependency version to 0.23
• Update opentelemetry-http dependency version to 0.12
• Breaking #1750
  • Update the return type of LoggerProvider.shutdown() from Vec<LogResult<()>> to LogResult<()>.

v0.22.1

Fixed

• #1576 Fix Span kind is always set to "internal".

v0.22.0

Deprecated

• XrayIdGenerator in the opentelemetry-sdk has been deprecated and moved to version 0.10.0 of the opentelemetry-aws crate.

Added

• #1410 Add experimental synchronous gauge

• #1471 Configure batch log record processor via OTEL_BLRP_* environment variables and via OtlpLogPipeline::with_batch_config

• #1503 Make the documentation for In-Memory exporters visible.

• #1526 Performance Improvement : Creating Spans and LogRecords are now faster, by avoiding expensive cloning of Resource for every Span/LogRecord.

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.

• Breaking Remove TextMapCompositePropagator #1373. Use TextMapCompositePropagator in opentelemetry API.

• #1375 Fix metric collections during PeriodicReader shutdown

• Breaking #1480 Remove fine grained BatchConfig configurations from BatchLogProcessorBuilder and BatchSpanProcessorBuilder. Use BatchConfigBuilder to construct a BatchConfig instance and pass it using BatchLogProcessorBuilder::with_batch_config or BatchSpanProcessorBuilder::with_batch_config.

• Breaking #1480 Remove mutating functions from BatchConfig, use BatchConfigBuilder to construct a BatchConfig instance.

• Breaking #1495 Remove Batch LogRecord&Span Processor configuration via non-standard environment variables. Use the following table to migrate from the no longer supported non-standard environment variables to the standard ones.

No longer supported	Standard equivalent
OTEL_BLRP_SCHEDULE_DELAY_MILLIS	OTEL_BLRP_SCHEDULE_DELAY
OTEL_BLRP_EXPORT_TIMEOUT_MILLIS	OTEL_BLRP_EXPORT_TIMEOUT
OTEL_BSP_SCHEDULE_DELAY_MILLIS	OTEL_BSP_SCHEDULE_DELAY
OTEL_BSP_EXPORT_TIMEOUT_MILLIS	OTEL_BSP_EXPORT_TIMEOUT

• Breaking #1455 Make the LoggerProvider Owned

  • Logger now takes an Owned Logger instead of a Weak<LoggerProviderInner>
  • LoggerProviderInner is no longer pub (crate)
  • Logger.provider() now returns &LoggerProvider instead of an Option<LoggerProvider>

• #1519 Performance improvements when calling Counter::add() and UpDownCounter::add() with an empty set of attributes (e.g. counter.Add(5, &[]))

• Breaking Renamed MeterProvider and Meter to SdkMeterProvider and SdkMeter respectively to avoid name collision with public API types. #1328

Fixed

• #1481 Fix error message caused by race condition when using PeriodicReader

v0.21.2

Fixed

• Fix delta aggregation metric reuse. #1434
• Fix max_scale validation of exponential histogram configuration. #1452

v0.21.1

Fixed

• Fix metric export corruption if gauges have not received a last value. #1363
• Return consistent Meter for a given scope from MeterProvider. #1351

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. #1194.

• 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 _ #1274

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