# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

**Breaking changes ongoing**

> [!IMPORTANT]
> We are working on stabilizing the Log signal that would require making deprecations and breaking changes. We will try to reduce the releases that may require an update to your code, especially for instrumentations or for sdk developers.

## Version 1.39.1/0.60b1 (2025-12-11)

- Silence events API warnings for internal users
  ([#4847](https://github.com/open-telemetry/opentelemetry-python/pull/4847))

## Version 1.39.0/0.60b0 (2025-12-03)

- `opentelemetry-api`: Convert objects of any type other than AnyValue in attributes to string to be exportable
  ([#4808](https://github.com/open-telemetry/opentelemetry-python/pull/4808))
- docs: Added sqlcommenter example
  ([#4734](https://github.com/open-telemetry/opentelemetry-python/pull/4734))
- build: bump ruff to 0.14.1
  ([#4782](https://github.com/open-telemetry/opentelemetry-python/pull/4782))
- Add `opentelemetry-exporter-credential-provider-gcp` as an optional dependency to `opentelemetry-exporter-otlp-proto-grpc` 
  and `opentelemetry-exporter-otlp-proto-http` 
  ([#4760](https://github.com/open-telemetry/opentelemetry-python/pull/4760))
- semantic-conventions: Bump to 1.38.0
  ([#4791](https://github.com/open-telemetry/opentelemetry-python/pull/4791))
- [BREAKING] Remove LogData and extend SDK LogRecord to have instrumentation scope
  ([#4676](https://github.com/open-telemetry/opentelemetry-python/pull/4676))
- [BREAKING] Rename several classes from Log to LogRecord
  ([#4647](https://github.com/open-telemetry/opentelemetry-python/pull/4647))

  **Migration Guide:**
  
  `LogData` has been removed. Users should update their code as follows:
  
  - **For Log Exporters:** Change from `Sequence[LogData]` to `Sequence[ReadableLogRecord]`
    ```python
    # Before
    from opentelemetry.sdk._logs import LogData
    def export(self, batch: Sequence[LogData]) -> LogRecordExportResult:
        ...
    
    # After
    from opentelemetry.sdk._logs import ReadableLogRecord
    def export(self, batch: Sequence[ReadableLogRecord]) -> LogRecordExportResult:
        ...
    ```
  
  - **For Log Processors:** Use `ReadWriteLogRecord` for processing, `ReadableLogRecord` for exporting
    ```python
    # Before
    from opentelemetry.sdk._logs import LogData
    def on_emit(self, log_data: LogData):
        ...
    
    # After
    from opentelemetry.sdk._logs import ReadWriteLogRecord, ReadableLogRecord
    def on_emit(self, log_record: ReadWriteLogRecord):
        # Convert to ReadableLogRecord before exporting
        readable = ReadableLogRecord(
            log_record=log_record.log_record,
            resource=log_record.resource or Resource.create({}),
            instrumentation_scope=log_record.instrumentation_scope,
            limits=log_record.limits,
        )
        ...
    ```
  
  - **Accessing log data:** Use the same attributes on `ReadableLogRecord`/`ReadWriteLogRecord`
    - `log_record.log_record` - The API LogRecord (contains body, severity, attributes, etc.)
    - `log_record.resource` - The Resource
    - `log_record.instrumentation_scope` - The InstrumentationScope (now included, was in LogData before)
    - `log_record.limits` - The LogRecordLimits
- Mark the Events API/SDK as deprecated. The Logs API/SDK should be used instead, an event is now a `LogRecord` with the `event_name` field set
([#4654](https://github.com/open-telemetry/opentelemetry-python/pull/4654)).
- Fix type checking for built-in metric exporters
  ([#4820](https://github.com/open-telemetry/opentelemetry-python/pull/4820))
  
## Version 1.38.0/0.59b0 (2025-10-16)

- Add `rstcheck` to pre-commit to stop introducing invalid RST
  ([#4755](https://github.com/open-telemetry/opentelemetry-python/pull/4755))
- logs: extend Logger.emit to accept separated keyword arguments
  ([#4737](https://github.com/open-telemetry/opentelemetry-python/pull/4737))
- logs: add warnings for classes that would be deprecated and renamed in 1.39.0
  ([#4771](https://github.com/open-telemetry/opentelemetry-python/pull/4771))

## Version 1.37.0/0.58b0 (2025-09-11)

- Add experimental composite samplers
  ([#4714](https://github.com/open-telemetry/opentelemetry-python/pull/4714))
- Add new environment variables to the SDK `OTEL_PYTHON_EXPORTER_OTLP_{HTTP/GRPC}_{METRICS/TRACES/LOGS}_CREDENTIAL_PROVIDER` that can be used to
inject a `requests.Session` or `grpc.ChannelCredentials` object into OTLP exporters created during auto instrumentation [#4689](https://github.com/open-telemetry/opentelemetry-python/pull/4689).
- Filter duplicate logs out of some internal `logger`'s logs on the export logs path that might otherwise endlessly log or cause a recursion depth exceeded issue in cases where logging itself results in an exception.
  ([#4695](https://github.com/open-telemetry/opentelemetry-python/pull/4695)).
- docs: linked the examples with their github source code location and added Prometheus example
  ([#4728](https://github.com/open-telemetry/opentelemetry-python/pull/4728))
- Permit to override default HTTP OTLP exporters headers
  ([#4634](https://github.com/open-telemetry/opentelemetry-python/pull/4634))
- semantic-conventions: Bump to 1.37.0
  ([#4731](https://github.com/open-telemetry/opentelemetry-python/pull/4731))
- opentelemetry-sdk: fix handling of OTEL_ATTRIBUTE_COUNT_LIMIT in logs
  ([#4677](https://github.com/open-telemetry/opentelemetry-python/pull/4677))
- Performance: Cache `importlib_metadata.entry_points`
  ([#4735](https://github.com/open-telemetry/opentelemetry-python/pull/4735))
- opentelemetry-sdk: fix calling Logger.emit with an API LogRecord instance
  ([#4741](https://github.com/open-telemetry/opentelemetry-python/pull/4741))

## Version 1.36.0/0.57b0 (2025-07-29)

- Add missing Prometheus exporter documentation
  ([#4485](https://github.com/open-telemetry/opentelemetry-python/pull/4485))
- Overwrite logging.config.fileConfig and logging.config.dictConfig to ensure
the OTLP `LogHandler` remains attached to the root logger. Fix a bug that
can cause a deadlock to occur over `logging._lock` in some cases ([#4636](https://github.com/open-telemetry/opentelemetry-python/pull/4636)).
- otlp-http-exporter: set default value for param `timeout_sec` in `_export` method
  ([#4691](https://github.com/open-telemetry/opentelemetry-python/pull/4691))

- Update OTLP gRPC/HTTP exporters: calling shutdown will now interrupt exporters that are sleeping
  before a retry attempt, and cause them to return failure immediately.
  Update BatchSpan/LogRecordProcessors: shutdown will now complete after 30 seconds of trying to finish
  exporting any buffered telemetry, instead of continuing to export until all telemetry was exported.
  ([#4638](https://github.com/open-telemetry/opentelemetry-python/pull/4638)).

## Version 1.35.0/0.56b0 (2025-07-11)

- Update OTLP proto to v1.7 [#4645](https://github.com/open-telemetry/opentelemetry-python/pull/4645).
- Add `event_name` as a top level field in the `LogRecord`. Events are now simply logs with the
`event_name` field set, the logs SDK should be used to emit events ([#4652](https://github.com/open-telemetry/opentelemetry-python/pull/4652)).
- Update OTLP gRPC/HTTP exporters: the export timeout is now inclusive of all retries and backoffs.
  A +/-20% jitter was added to all backoffs. A pointless 32 second sleep that occurred after all retries
  had completed/failed was removed.
  ([#4564](https://github.com/open-telemetry/opentelemetry-python/pull/4564)).
- Update ConsoleLogExporter.export to handle LogRecord's containing bytes type
  in the body ([#4614](https://github.com/open-telemetry/opentelemetry-python/pull/4614/)).
- opentelemetry-sdk: Fix invalid `type: ignore` that causes mypy to ignore the whole file
  ([#4618](https://github.com/open-telemetry/opentelemetry-python/pull/4618))
- Add `span_exporter` property back to `BatchSpanProcessor` class
  ([#4621](https://github.com/open-telemetry/opentelemetry-python/pull/4621))
- Fix license field in pyproject.toml files
  ([#4625](https://github.com/open-telemetry/opentelemetry-python/pull/4625))
- Update logger level to NOTSET in logs example
  ([#4637](https://github.com/open-telemetry/opentelemetry-python/pull/4637))
- Logging API accepts optional `context`; deprecates `trace_id`, `span_id`, `trace_flags`.
  ([#4597](https://github.com/open-telemetry/opentelemetry-python/pull/4597)) and
  ([#4668](https://github.com/open-telemetry/opentelemetry-python/pull/4668))
- sdk: use context instead of trace_id,span_id for initializing LogRecord
  ([#4653](https://github.com/open-telemetry/opentelemetry-python/pull/4653))
- Rename LogRecordProcessor.emit to on_emit
  ([#4648](https://github.com/open-telemetry/opentelemetry-python/pull/4648))
- Logging API hide std_to_otel function to convert python logging severity to otel severity
  ([#4649](https://github.com/open-telemetry/opentelemetry-python/pull/4649))
- proto: relax protobuf version requirement to support v6
  ([#4620](https://github.com/open-telemetry/opentelemetry-python/pull/4620))
- Bump semantic-conventions to 1.36.0
  ([#4669](https://github.com/open-telemetry/opentelemetry-python/pull/4669))
- Set expected User-Agent in HTTP headers for grpc OTLP exporter
  ([#4658](https://github.com/open-telemetry/opentelemetry-python/pull/4658))

## Version 1.34.0/0.55b0 (2025-06-04)

- typecheck: add sdk/resources and drop mypy
  ([#4578](https://github.com/open-telemetry/opentelemetry-python/pull/4578))
- Use PEP702 for marking deprecations
  ([#4522](https://github.com/open-telemetry/opentelemetry-python/pull/4522))
- Refactor `BatchLogRecordProcessor` and `BatchSpanProcessor` to simplify code
  and make the control flow more clear ([#4562](https://github.com/open-telemetry/opentelemetry-python/pull/4562/)
  [#4535](https://github.com/open-telemetry/opentelemetry-python/pull/4535), and
  [#4580](https://github.com/open-telemetry/opentelemetry-python/pull/4580)).
- Remove log messages from `BatchLogRecordProcessor.emit`, this caused the program
  to crash at shutdown with a max recursion error ([#4586](https://github.com/open-telemetry/opentelemetry-python/pull/4586)).
- Configurable max retry timeout for grpc exporter
  ([#4333](https://github.com/open-telemetry/opentelemetry-python/pull/4333))
- opentelemetry-api: allow importlib-metadata 8.7.0
  ([#4593](https://github.com/open-telemetry/opentelemetry-python/pull/4593))
- opentelemetry-test-utils: assert explicit bucket boundaries in histogram metrics
  ([#4595](https://github.com/open-telemetry/opentelemetry-python/pull/4595))
- Bump semantic conventions to 1.34.0
  ([#4599](https://github.com/open-telemetry/opentelemetry-python/pull/4599))
- Drop support for Python 3.8
  ([#4520](https://github.com/open-telemetry/opentelemetry-python/pull/4520))

## Version 1.33.0/0.54b0 (2025-05-09)

- Fix intermittent `Connection aborted` error when using otlp/http exporters
  ([#4477](https://github.com/open-telemetry/opentelemetry-python/pull/4477))
- opentelemetry-sdk: use stable code attributes: `code.function` -> `code.function.name`, `code.lineno` -> `code.line.number`, `code.filepath` -> `code.file.path`
  ([#4508](https://github.com/open-telemetry/opentelemetry-python/pull/4508))
- Fix serialization of extended attributes for logs signal
  ([#4342](https://github.com/open-telemetry/opentelemetry-python/pull/4342))
- Handle OTEL_PROPAGATORS contains None
  ([#4553](https://github.com/open-telemetry/opentelemetry-python/pull/4553))
- docs: updated and added to the metrics and log examples
  ([#4559](https://github.com/open-telemetry/opentelemetry-python/pull/4559))
- Bump semantic conventions to 1.33.0
  ([#4567](https://github.com/open-telemetry/opentelemetry-python/pull/4567))

## Version 1.32.0/0.53b0 (2025-04-10)

- Fix user agent in OTLP HTTP metrics exporter
  ([#4475](https://github.com/open-telemetry/opentelemetry-python/pull/4475))
- Improve performance of baggage operations
  ([#4466](https://github.com/open-telemetry/opentelemetry-python/pull/4466))
- sdk: remove duplicated constant definitions for `environment_variables`
  ([#4491](https://github.com/open-telemetry/opentelemetry-python/pull/4491))
- api: Revert record `BaseException` change in `trace_api.use_span()`
  ([#4494](https://github.com/open-telemetry/opentelemetry-python/pull/4494))
- Improve CI by cancelling stale runs and setting timeouts
  ([#4498](https://github.com/open-telemetry/opentelemetry-python/pull/4498))
- Patch logging.basicConfig so OTel logs don't cause console logs to disappear
  ([#4436](https://github.com/open-telemetry/opentelemetry-python/pull/4436))
- Bump semantic conventions to 1.32.0
  ([#4530](https://github.com/open-telemetry/opentelemetry-python/pull/4530))
- Fix ExplicitBucketHistogramAggregation to handle multiple explicit bucket boundaries advisories
  ([#4521](https://github.com/open-telemetry/opentelemetry-python/pull/4521))
- opentelemetry-sdk: Fix serialization of objects in log handler
  ([#4528](https://github.com/open-telemetry/opentelemetry-python/pull/4528))

## Version 1.31.0/0.52b0 (2025-03-12)

- semantic-conventions: Bump to 1.31.0
  ([#4471](https://github.com/open-telemetry/opentelemetry-python/pull/4471))
- Add type annotations to context's attach & detach
  ([#4346](https://github.com/open-telemetry/opentelemetry-python/pull/4346))
- Fix OTLP encoders missing instrumentation scope schema url and attributes
  ([#4359](https://github.com/open-telemetry/opentelemetry-python/pull/4359))
- prometheus-exporter: fix labels out of place for data points with different
  attribute sets
  ([#4413](https://github.com/open-telemetry/opentelemetry-python/pull/4413))
- Type indent parameter in to_json
  ([#4402](https://github.com/open-telemetry/opentelemetry-python/pull/4402))
- Tolerates exceptions when loading resource detectors via `OTEL_EXPERIMENTAL_RESOURCE_DETECTORS`
  ([#4373](https://github.com/open-telemetry/opentelemetry-python/pull/4373))
- Disconnect gRPC client stub when shutting down `OTLPSpanExporter`
  ([#4370](https://github.com/open-telemetry/opentelemetry-python/pull/4370))
- opentelemetry-sdk: fix OTLP exporting of Histograms with explicit buckets advisory
  ([#4434](https://github.com/open-telemetry/opentelemetry-python/pull/4434))
- opentelemetry-exporter-otlp-proto-grpc: better dependency version range for Python 3.13
  ([#4444](https://github.com/open-telemetry/opentelemetry-python/pull/4444))
- opentelemetry-exporter-opencensus: better dependency version range for Python 3.13
  ([#4444](https://github.com/open-telemetry/opentelemetry-python/pull/4444))
- Updated `tracecontext-integration-test` gitref to `d782773b2cf2fa4afd6a80a93b289d8a74ca894d`
  ([#4448](https://github.com/open-telemetry/opentelemetry-python/pull/4448))
- Make `trace_api.use_span()` record `BaseException` as well as `Exception`
  ([#4406](https://github.com/open-telemetry/opentelemetry-python/pull/4406))
- Fix env var error message for TraceLimits/SpanLimits
  ([#4458](https://github.com/open-telemetry/opentelemetry-python/pull/4458))
- pylint-ci updated python version to 3.13
  ([#4450](https://github.com/open-telemetry/opentelemetry-python/pull/4450))
- Fix memory leak in Log & Trace exporter
  ([#4449](https://github.com/open-telemetry/opentelemetry-python/pull/4449))

## Version 1.30.0/0.51b0 (2025-02-03)

- Always setup logs sdk, OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED only controls python `logging` module handler setup
  ([#4340](https://github.com/open-telemetry/opentelemetry-python/pull/4340))
- Add `attributes` field in `metrics.get_meter` wrapper function
  ([#4364](https://github.com/open-telemetry/opentelemetry-python/pull/4364))
- Add Python 3.13 support
  ([#4353](https://github.com/open-telemetry/opentelemetry-python/pull/4353))
- sdk: don't log or print warnings when the SDK has been disabled
  ([#4371](https://github.com/open-telemetry/opentelemetry-python/pull/4371))
- Fix span context manager typing by using ParamSpec from typing_extensions
  ([#4389](https://github.com/open-telemetry/opentelemetry-python/pull/4389))
- Fix serialization of None values in logs body to match 1.31.0+ data model
  ([#4400](https://github.com/open-telemetry/opentelemetry-python/pull/4400))
- [BREAKING] semantic-conventions: Remove `opentelemetry.semconv.attributes.network_attributes.NETWORK_INTERFACE_NAME`
  introduced by mistake in the wrong module.
  ([#4391](https://github.com/open-telemetry/opentelemetry-python/pull/4391))
- Add support for explicit bucket boundaries advisory for Histograms
  ([#4361](https://github.com/open-telemetry/opentelemetry-python/pull/4361))
- semantic-conventions: Bump to 1.30.0
  ([#4337](https://github.com/open-telemetry/opentelemetry-python/pull/4397))

## Version 1.29.0/0.50b0 (2024-12-11)

- Fix crash exporting a log record with None body
  ([#4276](https://github.com/open-telemetry/opentelemetry-python/pull/4276))
- Fix metrics export with exemplar and no context and filtering observable instruments
  ([#4251](https://github.com/open-telemetry/opentelemetry-python/pull/4251))
- Fix recursion error with sdk disabled and handler added to root logger
  ([#4259](https://github.com/open-telemetry/opentelemetry-python/pull/4259))
- sdk: setup EventLogger when OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED is set
  ([#4270](https://github.com/open-telemetry/opentelemetry-python/pull/4270))
- api: fix logging of duplicate EventLogger setup warning
  ([#4299](https://github.com/open-telemetry/opentelemetry-python/pull/4299))
- sdk: fix setting of process owner in ProcessResourceDetector
  ([#4311](https://github.com/open-telemetry/opentelemetry-python/pull/4311))
- sdk: fix serialization of logs severity_number field to int
  ([#4324](https://github.com/open-telemetry/opentelemetry-python/pull/4324))
- Remove `TestBase.assertEqualSpanInstrumentationInfo` method, use `assertEqualSpanInstrumentationScope` instead
  ([#4310](https://github.com/open-telemetry/opentelemetry-python/pull/4310))
- sdk: instantiate lazily `ExemplarBucket`s in `ExemplarReservoir`s
  ([#4260](https://github.com/open-telemetry/opentelemetry-python/pull/4260))
- semantic-conventions: Bump to 1.29.0
  ([#4337](https://github.com/open-telemetry/opentelemetry-python/pull/4337))

## Version 1.28.0/0.49b0 (2024-11-05)

- Removed superfluous py.typed markers and added them where they were missing
  ([#4172](https://github.com/open-telemetry/opentelemetry-python/pull/4172))
- Include metric info in encoding exceptions
  ([#4154](https://github.com/open-telemetry/opentelemetry-python/pull/4154))
- sdk: Add support for log formatting
  ([#4137](https://github.com/open-telemetry/opentelemetry-python/pull/4166))
- sdk: Add Host resource detector
  ([#4182](https://github.com/open-telemetry/opentelemetry-python/pull/4182))
- sdk: Implementation of exemplars
  ([#4094](https://github.com/open-telemetry/opentelemetry-python/pull/4094))
- Implement events sdk
  ([#4176](https://github.com/open-telemetry/opentelemetry-python/pull/4176))
- Update semantic conventions to version 1.28.0
  ([#4218](https://github.com/open-telemetry/opentelemetry-python/pull/4218))
- Add support to protobuf 5+ and drop support to protobuf 3 and 4
  ([#4206](https://github.com/open-telemetry/opentelemetry-python/pull/4206))
- Update environment variable descriptions to match signal
  ([#4222](https://github.com/open-telemetry/opentelemetry-python/pull/4222))
- Record logger name as the instrumentation scope name
  ([#4208](https://github.com/open-telemetry/opentelemetry-python/pull/4208))
- Fix memory leak in exporter and reader
  ([#4224](https://github.com/open-telemetry/opentelemetry-python/pull/4224))
- Drop `OTEL_PYTHON_EXPERIMENTAL_DISABLE_PROMETHEUS_UNIT_NORMALIZATION` environment variable
  ([#4217](https://github.com/open-telemetry/opentelemetry-python/pull/4217))
- Improve compatibility with other logging libraries that override
  `LogRecord.getMessage()` in order to customize message formatting
  ([#4216](https://github.com/open-telemetry/opentelemetry-python/pull/4216))

## Version 1.27.0/0.48b0 (2024-08-28)

- Implementation of Events API
  ([#4054](https://github.com/open-telemetry/opentelemetry-python/pull/4054))
- Make log sdk add `exception.message` to logRecord for exceptions whose argument
  is an exception not a string message
  ([#4122](https://github.com/open-telemetry/opentelemetry-python/pull/4122))
- Fix use of `link.attributes.dropped`, which may not exist
  ([#4119](https://github.com/open-telemetry/opentelemetry-python/pull/4119))
- Running mypy on SDK resources
  ([#4053](https://github.com/open-telemetry/opentelemetry-python/pull/4053))
- Added py.typed file to top-level module
  ([#4084](https://github.com/open-telemetry/opentelemetry-python/pull/4084))
- Drop Final annotation from Enum in semantic conventions
  ([#4085](https://github.com/open-telemetry/opentelemetry-python/pull/4085))
- Update log export example to not use root logger ([#4090](https://github.com/open-telemetry/opentelemetry-python/pull/4090))
- sdk: Add OS resource detector
  ([#3992](https://github.com/open-telemetry/opentelemetry-python/pull/3992))
- sdk: Accept non URL-encoded headers in `OTEL_EXPORTER_OTLP_*HEADERS` to match other languages SDKs
  ([#4103](https://github.com/open-telemetry/opentelemetry-python/pull/4103))
- Update semantic conventions to version 1.27.0
  ([#4104](https://github.com/open-telemetry/opentelemetry-python/pull/4104))
- Add support to type bytes for OTLP AnyValue
  ([#4128](https://github.com/open-telemetry/opentelemetry-python/pull/4128))
- Export ExponentialHistogram and ExponentialHistogramDataPoint
  ([#4134](https://github.com/open-telemetry/opentelemetry-python/pull/4134))
- Implement Client Key and Certificate File Support for All OTLP Exporters
  ([#4116](https://github.com/open-telemetry/opentelemetry-python/pull/4116))
- Remove `_start_time_unix_nano` attribute from `_ViewInstrumentMatch` in favor
  of using `time_ns()` at the moment when the aggregation object is created
  ([#4137](https://github.com/open-telemetry/opentelemetry-python/pull/4137))

## Version 1.26.0/0.47b0 (2024-07-25)

- Standardizing timeout calculation in measurement consumer collect to nanoseconds
  ([#4074](https://github.com/open-telemetry/opentelemetry-python/pull/4074))
- optional scope attributes for logger creation
  ([#4035](https://github.com/open-telemetry/opentelemetry-python/pull/4035))
- optional scope attribute for tracer creation
  ([#4028](https://github.com/open-telemetry/opentelemetry-python/pull/4028))
- OTLP exporter is encoding invalid span/trace IDs in the logs fix
  ([#4006](https://github.com/open-telemetry/opentelemetry-python/pull/4006))
- Update sdk process resource detector `process.command_args` attribute to also include the executable itself
  ([#4032](https://github.com/open-telemetry/opentelemetry-python/pull/4032))
- Fix `start_time_unix_nano` for delta collection for explicit bucket histogram aggregation
  ([#4009](https://github.com/open-telemetry/opentelemetry-python/pull/4009))
- Fix `start_time_unix_nano` for delta collection for sum aggregation
  ([#4011](https://github.com/open-telemetry/opentelemetry-python/pull/4011))
- Update opentracing and opencesus docs examples to not use JaegerExporter
  ([#4023](https://github.com/open-telemetry/opentelemetry-python/pull/4023))
- Do not execute Flask Tests in debug mode
  ([#3956](https://github.com/open-telemetry/opentelemetry-python/pull/3956))
- When encountering an error encoding metric attributes in the OTLP exporter, log the key that had an error.
  ([#3838](https://github.com/open-telemetry/opentelemetry-python/pull/3838))
- Fix `ExponentialHistogramAggregation`
  ([#3978](https://github.com/open-telemetry/opentelemetry-python/pull/3978))
- Log a warning when a `LogRecord` in `sdk/log` has dropped attributes
  due to reaching limits
  ([#3946](https://github.com/open-telemetry/opentelemetry-python/pull/3946))
- Fix RandomIdGenerator can generate invalid Span/Trace Ids
  ([#3949](https://github.com/open-telemetry/opentelemetry-python/pull/3949))
- Add Python 3.12 to tox
  ([#3616](https://github.com/open-telemetry/opentelemetry-python/pull/3616))
- Improve resource field structure for LogRecords
  ([#3972](https://github.com/open-telemetry/opentelemetry-python/pull/3972))
- Update Semantic Conventions code generation scripts:
  - fix namespace exclusion that resulted in dropping  `os` and `net` namespaces.
  - add `Final` decorator to constants to prevent collisions
  - enable mypy and fix detected issues
  - allow to drop specific attributes in preparation for Semantic Conventions v1.26.0
  ([#3973](https://github.com/open-telemetry/opentelemetry-python/pull/3966))
- Update semantic conventions to version 1.26.0.
  ([#3964](https://github.com/open-telemetry/opentelemetry-python/pull/3964))
- Use semconv exception attributes for record exceptions in spans
  ([#3979](https://github.com/open-telemetry/opentelemetry-python/pull/3979))
- Fix _encode_events assumes events.attributes.dropped exists
  ([#3965](https://github.com/open-telemetry/opentelemetry-python/pull/3965))
- Validate links at span creation
  ([#3991](https://github.com/open-telemetry/opentelemetry-python/pull/3991))
- Add attributes field in  `MeterProvider.get_meter` and `InstrumentationScope`
  ([#4015](https://github.com/open-telemetry/opentelemetry-python/pull/4015))
- Fix inaccessible `SCHEMA_URL` constants in `opentelemetry-semantic-conventions`
  ([#4069](https://github.com/open-telemetry/opentelemetry-python/pull/4069))

## Version 1.25.0/0.46b0 (2024-05-30)

- Fix class BoundedAttributes to have RLock rather than Lock
  ([#3859](https://github.com/open-telemetry/opentelemetry-python/pull/3859))
- Remove thread lock by loading RuntimeContext explicitly.
  ([#3763](https://github.com/open-telemetry/opentelemetry-python/pull/3763))
- Update proto version to v1.2.0
  ([#3844](https://github.com/open-telemetry/opentelemetry-python/pull/3844))
- Add to_json method to ExponentialHistogram
  ([#3780](https://github.com/open-telemetry/opentelemetry-python/pull/3780))
- Bump mypy to 1.9.0
  ([#3795](https://github.com/open-telemetry/opentelemetry-python/pull/3795))
- Fix exponential histograms
  ([#3798](https://github.com/open-telemetry/opentelemetry-python/pull/3798))
- Fix otlp exporter to export log_record.observed_timestamp
  ([#3785](https://github.com/open-telemetry/opentelemetry-python/pull/3785))
- Add capture the fully qualified type name for raised exceptions in spans
  ([#3837](https://github.com/open-telemetry/opentelemetry-python/pull/3837))
- Prometheus exporter sort label keys to prevent duplicate metrics when user input changes order
  ([#3698](https://github.com/open-telemetry/opentelemetry-python/pull/3698))
- Update semantic conventions to version 1.25.0.
  Refactor semantic-convention structure:
  - `SpanAttributes`, `ResourceAttributes`, and `MetricInstruments` are deprecated.
  - Attribute and metric definitions are now grouped by the namespace.
  - Stable attributes and metrics are moved to `opentelemetry.semconv.attributes`
  and `opentelemetry.semconv.metrics` modules.
  - Stable and experimental attributes and metrics are defined under
  `opentelemetry.semconv._incubating` import path.
  ([#3586](https://github.com/open-telemetry/opentelemetry-python/pull/3586))
- Rename test objects to avoid pytest warnings
  ([#3823] (https://github.com/open-telemetry/opentelemetry-python/pull/3823))
- Add span flags to OTLP spans and links
  ([#3881](https://github.com/open-telemetry/opentelemetry-python/pull/3881))
- Record links with invalid SpanContext if either attributes or TraceState are not empty
  ([#3917](https://github.com/open-telemetry/opentelemetry-python/pull/3917/))
- Add OpenTelemetry trove classifiers to PyPI packages
  ([#3913] (https://github.com/open-telemetry/opentelemetry-python/pull/3913))
- Fix prometheus metric name and unit conversion
  ([#3924](https://github.com/open-telemetry/opentelemetry-python/pull/3924))
  - this is a breaking change to prometheus metric names so they comply with the
  [specification](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.33.0/specification/compatibility/prometheus_and_openmetrics.md#otlp-metric-points-to-prometheus).
  - you can temporarily opt-out of the unit normalization by setting the environment variable
  `OTEL_PYTHON_EXPERIMENTAL_DISABLE_PROMETHEUS_UNIT_NORMALIZATION=true`
  - common unit abbreviations are converted to Prometheus conventions (`s` -> `seconds`),
  following the [collector's implementation](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/c0b51136575aa7ba89326d18edb4549e7e1bbdb9/pkg/translator/prometheus/normalize_name.go#L108)
  - repeated `_` are replaced with a single `_`
  - unit annotations (enclosed in curly braces like `{requests}`) are stripped away
  - units with slash are converted e.g. `m/s` -> `meters_per_second`.
  - The exporter's API is not changed
- Add parameters for Distros and configurators to configure autoinstrumentation in addition to existing environment variables.
  ([#3864](https://github.com/open-telemetry/opentelemetry-python/pull/3864))

## Version 1.24.0/0.45b0 (2024-03-28)

- Make create_gauge non-abstract method
  ([#3817](https://github.com/open-telemetry/opentelemetry-python/pull/3817))
- Make `tracer.start_as_current_span()` decorator work with async functions
  ([#3633](https://github.com/open-telemetry/opentelemetry-python/pull/3633))
- Fix python 3.12 deprecation warning
  ([#3751](https://github.com/open-telemetry/opentelemetry-python/pull/3751))
- bump mypy to 0.982
  ([#3776](https://github.com/open-telemetry/opentelemetry-python/pull/3776))
- Add support for OTEL_SDK_DISABLED environment variable
  ([#3648](https://github.com/open-telemetry/opentelemetry-python/pull/3648))
- Fix ValueError message for PeriodicExportingMetricsReader
  ([#3769](https://github.com/open-telemetry/opentelemetry-python/pull/3769))
- Use `BaseException` instead of `Exception` in `record_exception`
  ([#3354](https://github.com/open-telemetry/opentelemetry-python/pull/3354))
- Make span.record_exception more robust
  ([#3778](https://github.com/open-telemetry/opentelemetry-python/pull/3778))
- Fix license field in pyproject.toml files
  ([#3803](https://github.com/open-telemetry/opentelemetry-python/pull/3803))

## Version 1.23.0/0.44b0 (2024-02-23)

- Use Attribute rather than boundattribute in logrecord
  ([#3567](https://github.com/open-telemetry/opentelemetry-python/pull/3567))
- Fix flush error when no LoggerProvider configured for LoggingHandler
  ([#3608](https://github.com/open-telemetry/opentelemetry-python/pull/3608))
- Add `Span.add_link()` method to add link after span start
  ([#3618](https://github.com/open-telemetry/opentelemetry-python/pull/3618))
- Fix `OTLPMetricExporter` ignores `preferred_aggregation` property
  ([#3603](https://github.com/open-telemetry/opentelemetry-python/pull/3603))
- Logs: set `observed_timestamp` field
  ([#3565](https://github.com/open-telemetry/opentelemetry-python/pull/3565))
- Add missing Resource SchemaURL in OTLP exporters
  ([#3652](https://github.com/open-telemetry/opentelemetry-python/pull/3652))
- Fix loglevel warning text
  ([#3566](https://github.com/open-telemetry/opentelemetry-python/pull/3566))
- Prometheus Exporter string representation for target_info labels
  ([#3659](https://github.com/open-telemetry/opentelemetry-python/pull/3659))
- Logs: ObservedTimestamp field is missing in console exporter output
  ([#3564](https://github.com/open-telemetry/opentelemetry-python/pull/3564))
- Fix explicit bucket histogram aggregation
  ([#3429](https://github.com/open-telemetry/opentelemetry-python/pull/3429))
- Add `code.lineno`, `code.function` and `code.filepath` to all logs
  ([#3675](https://github.com/open-telemetry/opentelemetry-python/pull/3675))
- Add Synchronous Gauge instrument
  ([#3462](https://github.com/open-telemetry/opentelemetry-python/pull/3462))
- Drop support for 3.7
  ([#3668](https://github.com/open-telemetry/opentelemetry-python/pull/3668))
- Include key in attribute sequence warning
  ([#3639](https://github.com/open-telemetry/opentelemetry-python/pull/3639))
- Upgrade markupsafe, Flask and related dependencies to dev and test
  environments ([#3609](https://github.com/open-telemetry/opentelemetry-python/pull/3609))
- Handle HTTP 2XX responses as successful in OTLP exporters
  ([#3623](https://github.com/open-telemetry/opentelemetry-python/pull/3623))
- Improve Resource Detector timeout messaging
  ([#3645](https://github.com/open-telemetry/opentelemetry-python/pull/3645))
- Add Proxy classes for logging
  ([#3575](https://github.com/open-telemetry/opentelemetry-python/pull/3575))
- Remove dependency on 'backoff' library
  ([#3679](https://github.com/open-telemetry/opentelemetry-python/pull/3679))

## Version 1.22.0/0.43b0 (2023-12-15)

- Prometheus exporter sanitize info metric
  ([#3572](https://github.com/open-telemetry/opentelemetry-python/pull/3572))
- Remove Jaeger exporters
  ([#3554](https://github.com/open-telemetry/opentelemetry-python/pull/3554))
- Log stacktrace on `UNKNOWN` status OTLP export error
  ([#3536](https://github.com/open-telemetry/opentelemetry-python/pull/3536))
- Fix OTLPExporterMixin shutdown timeout period
  ([#3524](https://github.com/open-telemetry/opentelemetry-python/pull/3524))
- Handle `taskName` `logrecord` attribute
  ([#3557](https://github.com/open-telemetry/opentelemetry-python/pull/3557))

## Version 1.21.0/0.42b0 (2023-11-01)

- Fix `SumAggregation`
  ([#3390](https://github.com/open-telemetry/opentelemetry-python/pull/3390))
- Fix handling of empty metric collection cycles
  ([#3335](https://github.com/open-telemetry/opentelemetry-python/pull/3335))
- Fix error when no LoggerProvider configured for LoggingHandler
  ([#3423](https://github.com/open-telemetry/opentelemetry-python/pull/3423))
- Make `opentelemetry_metrics_exporter` entrypoint support pull exporters
  ([#3428](https://github.com/open-telemetry/opentelemetry-python/pull/3428))
- Allow instrument names to have '/' and up to 255 characters
  ([#3442](https://github.com/open-telemetry/opentelemetry-python/pull/3442))
- Do not load Resource on sdk import
  ([#3447](https://github.com/open-telemetry/opentelemetry-python/pull/3447))
- Update semantic conventions to version 1.21.0
  ([#3251](https://github.com/open-telemetry/opentelemetry-python/pull/3251))
- Add missing schema_url in global api for logging and metrics
  ([#3251](https://github.com/open-telemetry/opentelemetry-python/pull/3251))
- Prometheus exporter support for auto instrumentation
  ([#3413](https://github.com/open-telemetry/opentelemetry-python/pull/3413))
- Implement Process Resource detector
  ([#3472](https://github.com/open-telemetry/opentelemetry-python/pull/3472))


## Version 1.20.0/0.41b0 (2023-09-04)

- Modify Prometheus exporter to translate non-monotonic Sums into Gauges
  ([#3306](https://github.com/open-telemetry/opentelemetry-python/pull/3306))

## Version 1.19.0/0.40b0 (2023-07-13)

- Drop `setuptools` runtime requirement.
  ([#3372](https://github.com/open-telemetry/opentelemetry-python/pull/3372))
- Update the body type in the log
  ([$3343](https://github.com/open-telemetry/opentelemetry-python/pull/3343))
- Add max_scale option to Exponential Bucket Histogram Aggregation
  ([#3323](https://github.com/open-telemetry/opentelemetry-python/pull/3323))
- Use BoundedAttributes instead of raw dict to extract attributes from LogRecord
  ([#3310](https://github.com/open-telemetry/opentelemetry-python/pull/3310))
- Support dropped_attributes_count in LogRecord and exporters
  ([#3351](https://github.com/open-telemetry/opentelemetry-python/pull/3351))
- Add unit to view instrument selection criteria
  ([#3341](https://github.com/open-telemetry/opentelemetry-python/pull/3341))
- Upgrade opentelemetry-proto to 0.20 and regen
  [#3355](https://github.com/open-telemetry/opentelemetry-python/pull/3355))
- Include endpoint in Grpc transient error warning
  [#3362](https://github.com/open-telemetry/opentelemetry-python/pull/3362))
- Fixed bug where logging export is tracked as trace
  [#3375](https://github.com/open-telemetry/opentelemetry-python/pull/3375))
- Default LogRecord observed_timestamp to current timestamp
  [#3377](https://github.com/open-telemetry/opentelemetry-python/pull/3377))


## Version 1.18.0/0.39b0 (2023-05-19)

- Select histogram aggregation with an environment variable
  ([#3265](https://github.com/open-telemetry/opentelemetry-python/pull/3265))
- Move Protobuf encoding to its own package
  ([#3169](https://github.com/open-telemetry/opentelemetry-python/pull/3169))
- Add experimental feature to detect resource detectors in auto instrumentation
  ([#3181](https://github.com/open-telemetry/opentelemetry-python/pull/3181))
- Fix exporting of ExponentialBucketHistogramAggregation from opentelemetry.sdk.metrics.view
  ([#3240](https://github.com/open-telemetry/opentelemetry-python/pull/3240))
- Fix headers types mismatch for OTLP Exporters
  ([#3226](https://github.com/open-telemetry/opentelemetry-python/pull/3226))
- Fix suppress instrumentation for log batch processor
  ([#3223](https://github.com/open-telemetry/opentelemetry-python/pull/3223))
- Add speced out environment variables and arguments for BatchLogRecordProcessor
  ([#3237](https://github.com/open-telemetry/opentelemetry-python/pull/3237))
- Add benchmark tests for metrics
  ([#3267](https://github.com/open-telemetry/opentelemetry-python/pull/3267))


## Version 1.17.0/0.38b0 (2023-03-22)

- Implement LowMemory temporality
  ([#3223](https://github.com/open-telemetry/opentelemetry-python/pull/3223))
- PeriodicExportingMetricReader will continue if collection times out
  ([#3100](https://github.com/open-telemetry/opentelemetry-python/pull/3100))
- Fix formatting of ConsoleMetricExporter.
  ([#3197](https://github.com/open-telemetry/opentelemetry-python/pull/3197))
- Fix use of built-in samplers in SDK configuration
  ([#3176](https://github.com/open-telemetry/opentelemetry-python/pull/3176))
- Implement shutdown procedure forOTLP grpc exporters
  ([#3138](https://github.com/open-telemetry/opentelemetry-python/pull/3138))
- Add exponential histogram
  ([#2964](https://github.com/open-telemetry/opentelemetry-python/pull/2964))
- Add OpenCensus trace bridge/shim
  ([#3210](https://github.com/open-telemetry/opentelemetry-python/pull/3210))

## Version 1.16.0/0.37b0 (2023-02-17)

- Change ``__all__`` to be statically defined.
  ([#3143](https://github.com/open-telemetry/opentelemetry-python/pull/3143))
- Remove the ability to set a global metric prefix for Prometheus exporter
  ([#3137](https://github.com/open-telemetry/opentelemetry-python/pull/3137))
- Adds environment variables for log exporter
  ([#3037](https://github.com/open-telemetry/opentelemetry-python/pull/3037))
- Add attribute name to type warning message.
  ([3124](https://github.com/open-telemetry/opentelemetry-python/pull/3124))
- Add db metric name to semantic conventions
  ([#3115](https://github.com/open-telemetry/opentelemetry-python/pull/3115))
- Fix User-Agent header value for OTLP exporters to conform to RFC7231 & RFC7230
  ([#3128](https://github.com/open-telemetry/opentelemetry-python/pull/3128))
- Fix validation of baggage values
  ([#3058](https://github.com/open-telemetry/opentelemetry-python/pull/3058))
- Fix capitalization of baggage keys
  ([#3151](https://github.com/open-telemetry/opentelemetry-python/pull/3151))
- Bump min required api version for OTLP exporters
  ([#3156](https://github.com/open-telemetry/opentelemetry-python/pull/3156))
- deprecate jaeger exporters
  ([#3158](https://github.com/open-telemetry/opentelemetry-python/pull/3158))
- Create a single resource instance
  ([#3118](https://github.com/open-telemetry/opentelemetry-python/pull/3118))

## Version 1.15.0/0.36b0 (2022-12-09)

- PeriodicExportingMetricsReader with +Inf interval
  to support explicit metric collection
  ([#3059](https://github.com/open-telemetry/opentelemetry-python/pull/3059))
- Regenerate opentelemetry-proto to be compatible with protobuf 3 and 4
  ([#3070](https://github.com/open-telemetry/opentelemetry-python/pull/3070))
- Rename parse_headers to parse_env_headers and improve error message
  ([#2376](https://github.com/open-telemetry/opentelemetry-python/pull/2376))
- Add url decode values from OTEL_RESOURCE_ATTRIBUTES
  ([#3046](https://github.com/open-telemetry/opentelemetry-python/pull/3046))
- Fixed circular dependency issue with custom samplers
  ([#3026](https://github.com/open-telemetry/opentelemetry-python/pull/3026))
- Add missing entry points for OTLP/HTTP exporter
  ([#3027](https://github.com/open-telemetry/opentelemetry-python/pull/3027))
- Update logging to include logging api as per specification
  ([#3038](https://github.com/open-telemetry/opentelemetry-python/pull/3038))
- Fix: Avoid generator in metrics _ViewInstrumentMatch.collect()
  ([#3035](https://github.com/open-telemetry/opentelemetry-python/pull/3035)
- [exporter-otlp-proto-grpc] add user agent string
  ([#3009](https://github.com/open-telemetry/opentelemetry-python/pull/3009))

## Version 1.14.0/0.35b0 (2022-11-04)

- Add logarithm and exponent mappings
  ([#2960](https://github.com/open-telemetry/opentelemetry-python/pull/2960))
- Add and use missing metrics environment variables
  ([#2968](https://github.com/open-telemetry/opentelemetry-python/pull/2968))
- Enabled custom samplers via entry points
  ([#2972](https://github.com/open-telemetry/opentelemetry-python/pull/2972))
- Update log symbol names
  ([#2943](https://github.com/open-telemetry/opentelemetry-python/pull/2943))
- Update explicit histogram bucket boundaries
  ([#2947](https://github.com/open-telemetry/opentelemetry-python/pull/2947))
- `exporter-otlp-proto-http`: add user agent string
  ([#2959](https://github.com/open-telemetry/opentelemetry-python/pull/2959))
- Add http-metric instrument names to semantic conventions
  ([#2976](https://github.com/open-telemetry/opentelemetry-python/pull/2976))
- [exporter/opentelemetry-exporter-otlp-proto-http] Add OTLPMetricExporter
  ([#2891](https://github.com/open-telemetry/opentelemetry-python/pull/2891))
- Add support for py3.11
  ([#2997](https://github.com/open-telemetry/opentelemetry-python/pull/2997))
- Fix a bug with exporter retries for with newer versions of the backoff library
  ([#2980](https://github.com/open-telemetry/opentelemetry-python/pull/2980))

## Version 1.13.0/0.34b0 (2022-09-26)

- Add a configurable max_export_batch_size to the gRPC metrics exporter
  ([#2809](https://github.com/open-telemetry/opentelemetry-python/pull/2809))
- Remove support for 3.6
  ([#2763](https://github.com/open-telemetry/opentelemetry-python/pull/2763))
- Update PeriodicExportingMetricReader to never call export() concurrently
  ([#2873](https://github.com/open-telemetry/opentelemetry-python/pull/2873))
- Add param for `indent` size to `LogRecord.to_json()`
  ([#2870](https://github.com/open-telemetry/opentelemetry-python/pull/2870))
- Fix: Remove `LogEmitter.flush()` to align with OTel Log spec
  ([#2863](https://github.com/open-telemetry/opentelemetry-python/pull/2863))
- Bump minimum required API/SDK version for exporters that support metrics
  ([#2918](https://github.com/open-telemetry/opentelemetry-python/pull/2918))
- Fix metric reader examples + added `preferred_temporality` and `preferred_aggregation`
  for `ConsoleMetricExporter`
  ([#2911](https://github.com/open-telemetry/opentelemetry-python/pull/2911))
- Add support for setting OTLP export protocol with env vars, as defined in the
  [specifications](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/protocol/exporter.md#specify-protocol)
  ([#2893](https://github.com/open-telemetry/opentelemetry-python/pull/2893))
- Add force_flush to span exporters
  ([#2919](https://github.com/open-telemetry/opentelemetry-python/pull/2919))

## Version 1.12.0/0.33b0 (2022-08-08)

- Add `force_flush` method to metrics exporter
  ([#2852](https://github.com/open-telemetry/opentelemetry-python/pull/2852))
- Change tracing to use `Resource.to_json()`
  ([#2784](https://github.com/open-telemetry/opentelemetry-python/pull/2784))
- Fix get_log_emitter instrumenting_module_version args typo
  ([#2830](https://github.com/open-telemetry/opentelemetry-python/pull/2830))
- Fix OTLP gRPC exporter warning message
  ([#2781](https://github.com/open-telemetry/opentelemetry-python/pull/2781))
- Fix tracing decorator with late configuration
  ([#2754](https://github.com/open-telemetry/opentelemetry-python/pull/2754))
- Fix --insecure of CLI argument
  ([#2696](https://github.com/open-telemetry/opentelemetry-python/pull/2696))
- Add temporality and aggregation configuration for metrics exporters,
  use `OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE` only for OTLP metrics exporter
  ([#2843](https://github.com/open-telemetry/opentelemetry-python/pull/2843))
- Instrument instances are always created through a Meter
  ([#2844](https://github.com/open-telemetry/opentelemetry-python/pull/2844))

## Version 1.12.0rc2/0.32b0 (2022-07-04)

- Fix instrument name and unit regexes
  ([#2796](https://github.com/open-telemetry/opentelemetry-python/pull/2796))
- Add optional sessions parameter to all Exporters leveraging requests.Session
  ([#2783](https://github.com/open-telemetry/opentelemetry-python/pull/2783)
- Add min/max fields to Histogram
  ([#2759](https://github.com/open-telemetry/opentelemetry-python/pull/2759))
- `opentelemetry-exporter-otlp-proto-http` Add support for OTLP/HTTP log exporter
  ([#2462](https://github.com/open-telemetry/opentelemetry-python/pull/2462))
- Fix yield of `None`-valued points
  ([#2745](https://github.com/open-telemetry/opentelemetry-python/pull/2745))
- Add missing `to_json` methods
  ([#2722](https://github.com/open-telemetry/opentelemetry-python/pull/2722)
- Fix type hints for textmap `Getter` and `Setter`
  ([#2657](https://github.com/open-telemetry/opentelemetry-python/pull/2657))
- Fix LogEmitterProvider.force_flush hanging randomly
  ([#2714](https://github.com/open-telemetry/opentelemetry-python/pull/2714))
- narrow protobuf dependencies to exclude protobuf >= 4
  ([#2720](https://github.com/open-telemetry/opentelemetry-python/pull/2720))
- Specify worker thread names
  ([#2724](https://github.com/open-telemetry/opentelemetry-python/pull/2724))
- Loosen dependency on `backoff` for newer Python versions
  ([#2726](https://github.com/open-telemetry/opentelemetry-python/pull/2726))
- fix: frozenset object has no attribute items
  ([#2727](https://github.com/open-telemetry/opentelemetry-python/pull/2727))
- fix: create suppress HTTP instrumentation key in opentelemetry context
  ([#2729](https://github.com/open-telemetry/opentelemetry-python/pull/2729))
- Support logs SDK auto instrumentation enable/disable with env
  ([#2728](https://github.com/open-telemetry/opentelemetry-python/pull/2728))
- fix: update entry point object references for metrics
  ([#2731](https://github.com/open-telemetry/opentelemetry-python/pull/2731))
- Allow set_status to accept the StatusCode and optional description
  ([#2735](https://github.com/open-telemetry/opentelemetry-python/pull/2735))
- Configure auto instrumentation to support metrics
  ([#2705](https://github.com/open-telemetry/opentelemetry-python/pull/2705))
- Add entrypoint for metrics exporter
  ([#2748](https://github.com/open-telemetry/opentelemetry-python/pull/2748))
- Fix Jaeger propagator usage with NonRecordingSpan
  ([#2762](https://github.com/open-telemetry/opentelemetry-python/pull/2762))
- Add `opentelemetry.propagate` module and `opentelemetry.propagators` package
  to the API reference documentation
  ([#2785](https://github.com/open-telemetry/opentelemetry-python/pull/2785))

## Version 1.12.0rc1/0.31b0 (2022-05-17)

- Fix LoggingHandler to handle LogRecord with exc_info=False
  ([#2690](https://github.com/open-telemetry/opentelemetry-python/pull/2690))
- Make metrics components public
  ([#2684](https://github.com/open-telemetry/opentelemetry-python/pull/2684))
- Update to semantic conventions v1.11.0
  ([#2669](https://github.com/open-telemetry/opentelemetry-python/pull/2669))
- Update opentelemetry-proto to v0.17.0
  ([#2668](https://github.com/open-telemetry/opentelemetry-python/pull/2668))
- Add CallbackOptions to observable instrument callback params
  ([#2664](https://github.com/open-telemetry/opentelemetry-python/pull/2664))
- Add timeouts to metric SDK
  ([#2653](https://github.com/open-telemetry/opentelemetry-python/pull/2653))
- Add variadic arguments to metric exporter/reader interfaces
  ([#2654](https://github.com/open-telemetry/opentelemetry-python/pull/2654))
- Added a `opentelemetry.sdk.resources.ProcessResourceDetector` that adds the
  'process.runtime.{name,version,description}' resource attributes when used
  with the `opentelemetry.sdk.resources.get_aggregated_resources` API
  ([#2660](https://github.com/open-telemetry/opentelemetry-python/pull/2660))
- Move Metrics API behind internal package
  ([#2651](https://github.com/open-telemetry/opentelemetry-python/pull/2651))

## Version 1.11.1/0.30b1 (2022-04-21)

- Add parameter to MetricReader constructor to select aggregation per instrument kind
  ([#2638](https://github.com/open-telemetry/opentelemetry-python/pull/2638))
- Add parameter to MetricReader constructor to select temporality per instrument kind
  ([#2637](https://github.com/open-telemetry/opentelemetry-python/pull/2637))
- Fix unhandled callback exceptions on async instruments
  ([#2614](https://github.com/open-telemetry/opentelemetry-python/pull/2614))
- Rename `DefaultCounter`, `DefaultHistogram`, `DefaultObservableCounter`,
  `DefaultObservableGauge`, `DefaultObservableUpDownCounter`, `DefaultUpDownCounter`
  instruments to `NoOpCounter`, `NoOpHistogram`, `NoOpObservableCounter`,
  `NoOpObservableGauge`, `NoOpObservableUpDownCounter`, `NoOpUpDownCounter`
  ([#2616](https://github.com/open-telemetry/opentelemetry-python/pull/2616))
- Deprecate InstrumentationLibraryInfo and Add InstrumentationScope
  ([#2583](https://github.com/open-telemetry/opentelemetry-python/pull/2583))

## Version 1.11.0/0.30b0 (2022-04-18)

- Rename API Measurement for async instruments to Observation
  ([#2617](https://github.com/open-telemetry/opentelemetry-python/pull/2617))
- Add support for zero or more callbacks
  ([#2602](https://github.com/open-telemetry/opentelemetry-python/pull/2602))
- Fix parsing of trace flags when extracting traceparent
  ([#2577](https://github.com/open-telemetry/opentelemetry-python/pull/2577))
- Add default aggregation
  ([#2543](https://github.com/open-telemetry/opentelemetry-python/pull/2543))
- Fix incorrect installation of some exporter “convenience” packages into
  “site-packages/src”
  ([#2525](https://github.com/open-telemetry/opentelemetry-python/pull/2525))
- Capture exception information as part of log attributes
  ([#2531](https://github.com/open-telemetry/opentelemetry-python/pull/2531))
- Change OTLPHandler to LoggingHandler
  ([#2528](https://github.com/open-telemetry/opentelemetry-python/pull/2528))
- Fix delta histogram sum not being reset on collection
  ([#2533](https://github.com/open-telemetry/opentelemetry-python/pull/2533))
- Add InMemoryMetricReader to metrics SDK
  ([#2540](https://github.com/open-telemetry/opentelemetry-python/pull/2540))
- Drop the usage of name field from log model in OTLP
  ([#2565](https://github.com/open-telemetry/opentelemetry-python/pull/2565))
- Update opentelemetry-proto to v0.15.0
  ([#2566](https://github.com/open-telemetry/opentelemetry-python/pull/2566))
- Remove `enable_default_view` option from sdk MeterProvider
  ([#2547](https://github.com/open-telemetry/opentelemetry-python/pull/2547))
- Update otlp-proto-grpc and otlp-proto-http exporters to have more lax requirements for `backoff` lib
  ([#2575](https://github.com/open-telemetry/opentelemetry-python/pull/2575))
- Add min/max to histogram point
  ([#2581](https://github.com/open-telemetry/opentelemetry-python/pull/2581))
- Update opentelemetry-proto to v0.16.0
  ([#2619](https://github.com/open-telemetry/opentelemetry-python/pull/2619))

## Version 1.10.0/0.29b0 (2022-03-10)

- Docs rework: [non-API docs are
  moving](https://github.com/open-telemetry/opentelemetry-python/issues/2172) to
  [opentelemetry.io](https://opentelemetry.io). For details, including a list of
  pages that have moved, see
  [#2453](https://github.com/open-telemetry/opentelemetry-python/pull/2453), and
  [#2498](https://github.com/open-telemetry/opentelemetry-python/pull/2498).
- `opentelemetry-exporter-otlp-proto-grpc` update SDK dependency to ~1.9.
  ([#2442](https://github.com/open-telemetry/opentelemetry-python/pull/2442))
- bugfix(auto-instrumentation): attach OTLPHandler to root logger
  ([#2450](https://github.com/open-telemetry/opentelemetry-python/pull/2450))
- Bump semantic conventions from 1.6.1 to 1.8.0
  ([#2461](https://github.com/open-telemetry/opentelemetry-python/pull/2461))
- fix exception handling in get_aggregated_resources
  ([#2464](https://github.com/open-telemetry/opentelemetry-python/pull/2464))
- Fix `OTEL_EXPORTER_OTLP_ENDPOINT` usage in OTLP HTTP trace exporter
  ([#2493](https://github.com/open-telemetry/opentelemetry-python/pull/2493))
- [exporter/opentelemetry-exporter-prometheus] restore package using the new metrics API
  ([#2321](https://github.com/open-telemetry/opentelemetry-python/pull/2321))

## Version 1.9.1/0.28b1 (2022-01-29)

- Update opentelemetry-proto to v0.12.0. Note that this update removes deprecated status codes.
  ([#2415](https://github.com/open-telemetry/opentelemetry-python/pull/2415))

## Version 1.9.0/0.28b0 (2022-01-26)

- Fix SpanLimits global span limit defaulting when set to 0
  ([#2398](https://github.com/open-telemetry/opentelemetry-python/pull/2398))
- Add Python version support policy
  ([#2397](https://github.com/open-telemetry/opentelemetry-python/pull/2397))
- Decode URL-encoded headers in environment variables
  ([#2312](https://github.com/open-telemetry/opentelemetry-python/pull/2312))
- [exporter/opentelemetry-exporter-otlp-proto-grpc] Add OTLPMetricExporter
  ([#2323](https://github.com/open-telemetry/opentelemetry-python/pull/2323))
- Complete metric exporter format and update OTLP exporter
  ([#2364](https://github.com/open-telemetry/opentelemetry-python/pull/2364))
- [api] Add `NoOpTracer` and `NoOpTracerProvider`. Marking `_DefaultTracer` and `_DefaultTracerProvider` as deprecated.
  ([#2363](https://github.com/open-telemetry/opentelemetry-python/pull/2363))
- [exporter/opentelemetry-exporter-otlp-proto-grpc] Add Sum to OTLPMetricExporter
  ([#2370](https://github.com/open-telemetry/opentelemetry-python/pull/2370))
- [api] Rename `_DefaultMeter` and `_DefaultMeterProvider` to `NoOpMeter` and `NoOpMeterProvider`.
  ([#2383](https://github.com/open-telemetry/opentelemetry-python/pull/2383))
- [exporter/opentelemetry-exporter-otlp-proto-grpc] Add Gauge to OTLPMetricExporter
  ([#2408](https://github.com/open-telemetry/opentelemetry-python/pull/2408))
- [logs] prevent None from causing problems
  ([#2410](https://github.com/open-telemetry/opentelemetry-python/pull/2410))

## Version 1.8.0/0.27b0 (2021-12-17)

- Adds Aggregation and instruments as part of Metrics SDK
  ([#2234](https://github.com/open-telemetry/opentelemetry-python/pull/2234))
- Update visibility of OTEL_METRICS_EXPORTER environment variable
  ([#2303](https://github.com/open-telemetry/opentelemetry-python/pull/2303))
- Adding entrypoints for log emitter provider and console, otlp log exporters
  ([#2253](https://github.com/open-telemetry/opentelemetry-python/pull/2253))
- Rename ConsoleExporter to ConsoleLogExporter
  ([#2307](https://github.com/open-telemetry/opentelemetry-python/pull/2307))
- Adding OTEL_LOGS_EXPORTER environment variable
  ([#2320](https://github.com/open-telemetry/opentelemetry-python/pull/2320))
- Add `setuptools` to `install_requires`
  ([#2334](https://github.com/open-telemetry/opentelemetry-python/pull/2334))
- Add otlp entrypoint for log exporter
  ([#2322](https://github.com/open-telemetry/opentelemetry-python/pull/2322))
- Support insecure configuration for OTLP gRPC exporter
  ([#2350](https://github.com/open-telemetry/opentelemetry-python/pull/2350))

## Version 1.7.1/0.26b1 (2021-11-11)

- Add support for Python 3.10
  ([#2207](https://github.com/open-telemetry/opentelemetry-python/pull/2207))
- remove `X-B3-ParentSpanId` for B3 propagator as per OpenTelemetry specification
  ([#2237](https://github.com/open-telemetry/opentelemetry-python/pull/2237))
- Populate `auto.version` in Resource if using auto-instrumentation
  ([#2243](https://github.com/open-telemetry/opentelemetry-python/pull/2243))
- Return proxy instruments from ProxyMeter
  ([#2169](https://github.com/open-telemetry/opentelemetry-python/pull/2169))
- Make Measurement a concrete class
  ([#2153](https://github.com/open-telemetry/opentelemetry-python/pull/2153))
- Add metrics API
  ([#1887](https://github.com/open-telemetry/opentelemetry-python/pull/1887))
- Make batch processor fork aware and reinit when needed
  ([#2242](https://github.com/open-telemetry/opentelemetry-python/pull/2242))
- `opentelemetry-sdk` Sanitize env var resource attribute pairs
  ([#2256](https://github.com/open-telemetry/opentelemetry-python/pull/2256))
- `opentelemetry-test` start releasing to pypi.org
  ([#2269](https://github.com/open-telemetry/opentelemetry-python/pull/2269))

## Version 1.6.2/0.25b2 (2021-10-19)

- Fix parental trace relationship for opentracing `follows_from` reference
  ([#2180](https://github.com/open-telemetry/opentelemetry-python/pull/2180))

## Version 1.6.1/0.25b1 (2021-10-18)

- Fix ReadableSpan property types attempting to create a mapping from a list
  ([#2215](https://github.com/open-telemetry/opentelemetry-python/pull/2215))
- Upgrade GRPC/protobuf related dependency and regenerate otlp protobufs
  ([#2201](https://github.com/open-telemetry/opentelemetry-python/pull/2201))
- Propagation: only warn about oversized baggage headers when headers exist
  ([#2212](https://github.com/open-telemetry/opentelemetry-python/pull/2212))

## Version 1.6.0/0.25b0 (2021-10-13)

- Fix race in `set_tracer_provider()`
  ([#2182](https://github.com/open-telemetry/opentelemetry-python/pull/2182))
- Automatically load OTEL environment variables as options for `opentelemetry-instrument`
  ([#1969](https://github.com/open-telemetry/opentelemetry-python/pull/1969))
- `opentelemetry-semantic-conventions` Update to semantic conventions v1.6.1
  ([#2077](https://github.com/open-telemetry/opentelemetry-python/pull/2077))
- Do not count invalid attributes for dropped
  ([#2096](https://github.com/open-telemetry/opentelemetry-python/pull/2096))
- Fix propagation bug caused by counting skipped entries
  ([#2071](https://github.com/open-telemetry/opentelemetry-python/pull/2071))
- Add entry point for exporters with default protocol
  ([#2093](https://github.com/open-telemetry/opentelemetry-python/pull/2093))
- Renamed entrypoints `otlp_proto_http_span`, `otlp_proto_grpc_span`, `console_span` to remove
  redundant `_span` suffix.
  ([#2093](https://github.com/open-telemetry/opentelemetry-python/pull/2093))
- Do not skip sequence attribute on decode error
  ([#2097](https://github.com/open-telemetry/opentelemetry-python/pull/2097))
- `opentelemetry-test`: Add `HttpTestBase` to allow tests with actual TCP sockets
  ([#2101](https://github.com/open-telemetry/opentelemetry-python/pull/2101))
- Fix incorrect headers parsing via environment variables
  ([#2103](https://github.com/open-telemetry/opentelemetry-python/pull/2103))
- Add support for OTEL_ATTRIBUTE_COUNT_LIMIT
  ([#2139](https://github.com/open-telemetry/opentelemetry-python/pull/2139))
- Attribute limits no longer apply to Resource attributes
  ([#2138](https://github.com/open-telemetry/opentelemetry-python/pull/2138))
- `opentelemetry-exporter-otlp`: Add `opentelemetry-otlp-proto-http` as dependency
  ([#2147](https://github.com/open-telemetry/opentelemetry-python/pull/2147))
- Fix validity calculation for trace and span IDs
  ([#2145](https://github.com/open-telemetry/opentelemetry-python/pull/2145))
- Add `schema_url` to `TracerProvider.get_tracer`
  ([#2154](https://github.com/open-telemetry/opentelemetry-python/pull/2154))
- Make baggage implementation w3c spec complaint
  ([#2167](https://github.com/open-telemetry/opentelemetry-python/pull/2167))
- Add name to `BatchSpanProcessor` worker thread
  ([#2186](https://github.com/open-telemetry/opentelemetry-python/pull/2186))

## Version 1.5.0/0.24b0 (2021-08-26)

- Add pre and post instrumentation entry points
  ([#1983](https://github.com/open-telemetry/opentelemetry-python/pull/1983))
- Fix documentation on well known exporters and variable OTEL_TRACES_EXPORTER which were misnamed
  ([#2023](https://github.com/open-telemetry/opentelemetry-python/pull/2023))
- `opentelemetry-sdk` `get_aggregated_resource()` returns default resource and service name
  whenever called
  ([#2013](https://github.com/open-telemetry/opentelemetry-python/pull/2013))
- `opentelemetry-distro` & `opentelemetry-sdk` Moved Auto Instrumentation Configurator code to SDK
  to let distros use its default implementation
  ([#1937](https://github.com/open-telemetry/opentelemetry-python/pull/1937))
- Add Trace ID validation to
  meet [TraceID spec](https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/overview.md#spancontext) ([#1992](https://github.com/open-telemetry/opentelemetry-python/pull/1992))
- Fixed Python 3.10 incompatibility in `opentelemetry-opentracing-shim` tests
  ([#2018](https://github.com/open-telemetry/opentelemetry-python/pull/2018))
- `opentelemetry-sdk` added support for `OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT`
  ([#2044](https://github.com/open-telemetry/opentelemetry-python/pull/2044))
- `opentelemetry-sdk` Fixed bugs (#2041, #2042 & #2045) in Span Limits
  ([#2044](https://github.com/open-telemetry/opentelemetry-python/pull/2044))
- `opentelemetry-sdk` Add support for `OTEL_ATTRIBUTE_VALUE_LENGTH_LIMIT` env var
  ([#2056](https://github.com/open-telemetry/opentelemetry-python/pull/2056))
- `opentelemetry-sdk` Treat limit even vars set to empty values as unset/unlimited.
  ([#2054](https://github.com/open-telemetry/opentelemetry-python/pull/2054))
- `opentelemetry-api` Attribute keys must be non-empty strings.
  ([#2057](https://github.com/open-telemetry/opentelemetry-python/pull/2057))

## Version 0.23.1 (2021-07-26)

### Changed

- Fix opentelemetry-bootstrap dependency script.
  ([#1987](https://github.com/open-telemetry/opentelemetry-python/pull/1987))

## Version 1.4.0/0.23b0 (2021-07-21)

### Added

- Moved `opentelemetry-instrumentation` to core repository.
  ([#1959](https://github.com/open-telemetry/opentelemetry-python/pull/1959))
- Add support for OTLP Exporter Protobuf over HTTP
  ([#1868](https://github.com/open-telemetry/opentelemetry-python/pull/1868))
- Dropped attributes/events/links count available exposed on ReadableSpans.
  ([#1893](https://github.com/open-telemetry/opentelemetry-python/pull/1893))
- Added dropped count to otlp, jaeger and zipkin exporters.
  ([#1893](https://github.com/open-telemetry/opentelemetry-python/pull/1893))

### Added

- Give OTLPHandler the ability to process attributes
  ([#1952](https://github.com/open-telemetry/opentelemetry-python/pull/1952))
- Add global LogEmitterProvider and convenience function get_log_emitter
  ([#1901](https://github.com/open-telemetry/opentelemetry-python/pull/1901))
- Add OTLPHandler for standard library logging module
  ([#1903](https://github.com/open-telemetry/opentelemetry-python/pull/1903))

### Changed

- Updated `opentelemetry-opencensus-exporter` to use `service_name` of spans instead of resource
  ([#1897](https://github.com/open-telemetry/opentelemetry-python/pull/1897))
- Added descriptions to the env variables mentioned in the opentelemetry-specification
  ([#1898](https://github.com/open-telemetry/opentelemetry-python/pull/1898))
- Ignore calls to `Span.set_status` with `StatusCode.UNSET` and also if previous status already
  had `StatusCode.OK`.
  ([#1902](https://github.com/open-telemetry/opentelemetry-python/pull/1902))
- Attributes for `Link` and `Resource` are immutable as they are for `Event`, which means
  any attempt to modify attributes directly will result in a `TypeError` exception.
  ([#1909](https://github.com/open-telemetry/opentelemetry-python/pull/1909))
- Added `BoundedAttributes` to the API to make it available for `Link` which is defined in the
  API. Marked `BoundedDict` in the SDK as deprecated as a result.
  ([#1915](https://github.com/open-telemetry/opentelemetry-python/pull/1915))
- Fix OTLP SpanExporter to distinguish spans based off Resource and InstrumentationInfo
  ([#1927](https://github.com/open-telemetry/opentelemetry-python/pull/1927))
- Updating dependency for opentelemetry api/sdk packages to support major version instead of
  pinning to specific versions.
  ([#1933](https://github.com/open-telemetry/opentelemetry-python/pull/1933))
- `opentelemetry-semantic-conventions` Generate semconv constants update for OTel Spec 1.5.0
  ([#1946](https://github.com/open-telemetry/opentelemetry-python/pull/1946))

### Fixed

- Updated `opentelementry-opentracing-shim` `ScopeShim` to report exceptions in
  opentelemetry specification format, rather than opentracing spec format.
  ([#1878](https://github.com/open-telemetry/opentelemetry-python/pull/1878))

## Version 1.3.0/0.22b0 (2021-06-01)

### Added

- Allow span limits to be set programmatically via TracerProvider.
  ([#1877](https://github.com/open-telemetry/opentelemetry-python/pull/1877))
- Added support for CreateKey functionality.
  ([#1853](https://github.com/open-telemetry/opentelemetry-python/pull/1853))

### Changed

- Updated get_tracer to return an empty string when passed an invalid name
  ([#1854](https://github.com/open-telemetry/opentelemetry-python/pull/1854))
- Changed AttributeValue sequences to warn mypy users on adding None values to array
  ([#1855](https://github.com/open-telemetry/opentelemetry-python/pull/1855))
- Fixed exporter OTLP header parsing to match baggage header formatting.
  ([#1869](https://github.com/open-telemetry/opentelemetry-python/pull/1869))
- Added optional `schema_url` field to `Resource` class
  ([#1871](https://github.com/open-telemetry/opentelemetry-python/pull/1871))
- Update protos to latest version release 0.9.0
  ([#1873](https://github.com/open-telemetry/opentelemetry-python/pull/1873))

## Version 1.2.0/0.21b0 (2021-05-11)

### Added

- Added example for running Django with auto instrumentation.
  ([#1803](https://github.com/open-telemetry/opentelemetry-python/pull/1803))
- Added `B3SingleFormat` and `B3MultiFormat` propagators to the `opentelemetry-propagator-b3` package.
  ([#1823](https://github.com/open-telemetry/opentelemetry-python/pull/1823))
- Added support for OTEL_SERVICE_NAME.
  ([#1829](https://github.com/open-telemetry/opentelemetry-python/pull/1829))
- Lazily read/configure limits and allow limits to be unset.
  ([#1839](https://github.com/open-telemetry/opentelemetry-python/pull/1839))
- Added support for OTEL_EXPORTER_JAEGER_TIMEOUT
  ([#1863](https://github.com/open-telemetry/opentelemetry-python/pull/1863))

### Changed

- Fixed OTLP gRPC exporter silently failing if scheme is not specified in endpoint.
  ([#1806](https://github.com/open-telemetry/opentelemetry-python/pull/1806))
- Rename CompositeHTTPPropagator to CompositePropagator as per specification.
  ([#1807](https://github.com/open-telemetry/opentelemetry-python/pull/1807))
- Propagators use the root context as default for `extract` and do not modify
  the context if extracting from carrier does not work.
  ([#1811](https://github.com/open-telemetry/opentelemetry-python/pull/1811))
- Fixed `b3` propagator entrypoint to point to `B3SingleFormat` propagator.
  ([#1823](https://github.com/open-telemetry/opentelemetry-python/pull/1823))
- Added `b3multi` propagator entrypoint to point to `B3MultiFormat` propagator.
  ([#1823](https://github.com/open-telemetry/opentelemetry-python/pull/1823))
- Improve warning when failing to decode byte attribute
  ([#1810](https://github.com/open-telemetry/opentelemetry-python/pull/1810))
- Fixed inconsistency in parent_id formatting from the ConsoleSpanExporter
  ([#1833](https://github.com/open-telemetry/opentelemetry-python/pull/1833))
- Include span parent in Jaeger gRPC export as `CHILD_OF` reference
  ([#1809])(https://github.com/open-telemetry/opentelemetry-python/pull/1809)
- Fixed sequence values in OTLP exporter not translating
  ([#1818](https://github.com/open-telemetry/opentelemetry-python/pull/1818))
- Update transient errors retry timeout and retryable status codes
  ([#1842](https://github.com/open-telemetry/opentelemetry-python/pull/1842))
- Apply validation of attributes to `Resource`, move attribute related logic to separate package.
  ([#1834](https://github.com/open-telemetry/opentelemetry-python/pull/1834))
- Fix start span behavior when excess links and attributes are included
  ([#1856](https://github.com/open-telemetry/opentelemetry-python/pull/1856))

### Removed

- Moved `opentelemetry-instrumentation` to contrib repository.
  ([#1797](https://github.com/open-telemetry/opentelemetry-python/pull/1797))

## Version 1.1.0 (2021-04-20)

### Added

- Added `py.typed` file to every package. This should resolve a bunch of mypy
  errors for users.
  ([#1720](https://github.com/open-telemetry/opentelemetry-python/pull/1720))
- Add auto generated trace and resource attributes semantic conventions
  ([#1759](https://github.com/open-telemetry/opentelemetry-python/pull/1759))
- Added `SpanKind` to `should_sample` parameters, suggest using parent span context's tracestate
  instead of manually passed in tracestate in `should_sample`
  ([#1764](https://github.com/open-telemetry/opentelemetry-python/pull/1764))
- Added experimental HTTP back propagators.
  ([#1762](https://github.com/open-telemetry/opentelemetry-python/pull/1762))
- Zipkin exporter: Add support for timeout and implement shutdown
  ([#1799](https://github.com/open-telemetry/opentelemetry-python/pull/1799))

### Changed

- Adjust `B3Format` propagator to be spec compliant by not modifying context
  when propagation headers are not present/invalid/empty
  ([#1728](https://github.com/open-telemetry/opentelemetry-python/pull/1728))
- Silence unnecessary warning when creating a new Status object without description.
  ([#1721](https://github.com/open-telemetry/opentelemetry-python/pull/1721))
- Update bootstrap cmd to use exact version when installing instrumentation packages.
  ([#1722](https://github.com/open-telemetry/opentelemetry-python/pull/1722))
- Fix B3 propagator to never return None.
  ([#1750](https://github.com/open-telemetry/opentelemetry-python/pull/1750))
- Added ProxyTracerProvider and ProxyTracer implementations to allow fetching provider
  and tracer instances before a global provider is set up.
  ([#1726](https://github.com/open-telemetry/opentelemetry-python/pull/1726))
- Added `__contains__` to `opentelementry.trace.span.TraceState`.
  ([#1773](https://github.com/open-telemetry/opentelemetry-python/pull/1773))
- `opentelemetry-opentracing-shim` Fix an issue in the shim where a Span was being wrapped
  in a NonRecordingSpan when it wasn't necessary.
  ([#1776](https://github.com/open-telemetry/opentelemetry-python/pull/1776))
- OTLP Exporter now uses the scheme in the endpoint to determine whether to establish
  a secure connection or not.
  ([#1771](https://github.com/open-telemetry/opentelemetry-python/pull/1771))

## Version 1.0.0 (2021-03-26)

### Added

- Document how to work with fork process web server models(Gunicorn, uWSGI etc...)
  ([#1609](https://github.com/open-telemetry/opentelemetry-python/pull/1609))
- Add `max_attr_value_length` support to Jaeger exporter
  ([#1633](https://github.com/open-telemetry/opentelemetry-python/pull/1633))
- Moved `use_span` from Tracer to `opentelemetry.trace.use_span`.
  ([#1668](https://github.com/open-telemetry/opentelemetry-python/pull/1668))
- `opentelemetry.trace.use_span()` will now overwrite previously set status on span in case an
  exception is raised inside the context manager and `set_status_on_exception` is set to `True`.
  ([#1668](https://github.com/open-telemetry/opentelemetry-python/pull/1668))
- Add `udp_split_oversized_batches` support to jaeger exporter
  ([#1500](https://github.com/open-telemetry/opentelemetry-python/pull/1500))

### Changed

- remove `service_name` from constructor of jaeger and opencensus exporters and
  use of env variable `OTEL_PYTHON_SERVICE_NAME`
  ([#1669])(https://github.com/open-telemetry/opentelemetry-python/pull/1669)
- Rename `IdsGenerator` to `IdGenerator`
  ([#1651](https://github.com/open-telemetry/opentelemetry-python/pull/1651))
- Make TracerProvider's resource attribute private
  ([#1652](https://github.com/open-telemetry/opentelemetry-python/pull/1652))
- Rename Resource's `create_empty` to `get_empty`
  ([#1653](https://github.com/open-telemetry/opentelemetry-python/pull/1653))
- Renamed `BatchExportSpanProcessor` to `BatchSpanProcessor` and `SimpleExportSpanProcessor` to
  `SimpleSpanProcessor`
  ([#1656](https://github.com/open-telemetry/opentelemetry-python/pull/1656))
- Rename `DefaultSpan` to `NonRecordingSpan`
  ([#1661](https://github.com/open-telemetry/opentelemetry-python/pull/1661))
- Fixed distro configuration with `OTEL_TRACES_EXPORTER` env var set to `otlp`
  ([#1657](https://github.com/open-telemetry/opentelemetry-python/pull/1657))
- Moving `Getter`, `Setter` and `TextMapPropagator` out of `opentelemetry.trace.propagation` and
  into `opentelemetry.propagators`
  ([#1662](https://github.com/open-telemetry/opentelemetry-python/pull/1662))
- Rename `BaggagePropagator` to `W3CBaggagePropagator`
  ([#1663](https://github.com/open-telemetry/opentelemetry-python/pull/1663))
- Rename `JaegerSpanExporter` to `JaegerExporter` and rename `ZipkinSpanExporter` to `ZipkinExporter`
  ([#1664](https://github.com/open-telemetry/opentelemetry-python/pull/1664))
- Expose `StatusCode` from the `opentelemetry.trace` module
  ([#1681](https://github.com/open-telemetry/opentelemetry-python/pull/1681))
- Status now only sets `description` when `status_code` is set to `StatusCode.ERROR`
  ([#1673](https://github.com/open-telemetry/opentelemetry-python/pull/1673))
- Update OTLP exporter to use OTLP proto `0.7.0`
  ([#1674](https://github.com/open-telemetry/opentelemetry-python/pull/1674))
- Remove time_ns from API and add a warning for older versions of Python
  ([#1602](https://github.com/open-telemetry/opentelemetry-python/pull/1602))
- Hide implementation classes/variables in api/sdk
  ([#1684](https://github.com/open-telemetry/opentelemetry-python/pull/1684))
- Cleanup OTLP exporter compression options, add tests
  ([#1671](https://github.com/open-telemetry/opentelemetry-python/pull/1671))
- Initial documentation for environment variables
  ([#1680](https://github.com/open-telemetry/opentelemetry-python/pull/1680))
- Change Zipkin exporter to obtain service.name from span
  ([#1696](https://github.com/open-telemetry/opentelemetry-python/pull/1696))
- Split up `opentelemetry-exporter-jaeger` package into `opentelemetry-exporter-jaeger-proto-grpc` and
  `opentelemetry-exporter-jaeger-thrift` packages to reduce dependencies for each one.
  ([#1694](https://github.com/open-telemetry/opentelemetry-python/pull/1694))
- Added `opentelemetry-exporter-otlp-proto-grpc` and changed `opentelemetry-exporter-otlp` to
  install it as a dependency. This will allow for the next package/protocol to also be in
  its own package.
  ([#1695](https://github.com/open-telemetry/opentelemetry-python/pull/1695))
- Change Jaeger exporters to obtain service.name from span
  ([#1703](https://github.com/open-telemetry/opentelemetry-python/pull/1703))
- Fixed an unset `OTEL_TRACES_EXPORTER` resulting in an error
  ([#1707](https://github.com/open-telemetry/opentelemetry-python/pull/1707))
- Split Zipkin exporter into `opentelemetry-exporter-zipkin-json` and
  `opentelemetry-exporter-zipkin-proto-http` packages to reduce dependencies. The
  `opentelemetry-exporter-zipkin` installs both.
  ([#1699](https://github.com/open-telemetry/opentelemetry-python/pull/1699))
- Make setters and getters optional
  ([#1690](https://github.com/open-telemetry/opentelemetry-python/pull/1690))

### Removed

- Removed unused `get_hexadecimal_trace_id` and `get_hexadecimal_span_id` methods.
  ([#1675](https://github.com/open-telemetry/opentelemetry-python/pull/1675))
- Remove `OTEL_EXPORTER_*_ INSECURE` env var
  ([#1682](https://github.com/open-telemetry/opentelemetry-python/pull/1682))
- Removing support for Python 3.5
  ([#1706](https://github.com/open-telemetry/opentelemetry-python/pull/1706))

## Version 0.19b0 (2021-03-26)

### Changed

- remove `service_name` from constructor of jaeger and opencensus exporters and
  use of env variable `OTEL_PYTHON_SERVICE_NAME`
  ([#1669])(https://github.com/open-telemetry/opentelemetry-python/pull/1669)
- Rename `IdsGenerator` to `IdGenerator`
  ([#1651](https://github.com/open-telemetry/opentelemetry-python/pull/1651))

### Removed

- Removing support for Python 3.5
  ([#1706](https://github.com/open-telemetry/opentelemetry-python/pull/1706))

## Version 0.18b0 (2021-02-16)

### Added

- Add urllib to opentelemetry-bootstrap target list
  ([#1584](https://github.com/open-telemetry/opentelemetry-python/pull/1584))

## Version 1.0.0rc1 (2021-02-12)

### Changed

- Tracer provider environment variables are now consistent with the rest
  ([#1571](https://github.com/open-telemetry/opentelemetry-python/pull/1571))
- Rename `TRACE_` to `TRACES_` for environment variables
  ([#1595](https://github.com/open-telemetry/opentelemetry-python/pull/1595))
- Limits for Span attributes, events and links have been updated to 128
  ([1597](https://github.com/open-telemetry/opentelemetry-python/pull/1597))
- Read-only Span attributes have been moved to ReadableSpan class
  ([#1560](https://github.com/open-telemetry/opentelemetry-python/pull/1560))
- `BatchExportSpanProcessor` flushes export queue when it reaches `max_export_batch_size`
  ([#1521](https://github.com/open-telemetry/opentelemetry-python/pull/1521))

### Added

- Added `end_on_exit` argument to `start_as_current_span`
  ([#1519](https://github.com/open-telemetry/opentelemetry-python/pull/1519))
- Add `Span.set_attributes` method to set multiple values with one call
  ([#1520](https://github.com/open-telemetry/opentelemetry-python/pull/1520))
- Make sure Resources follow semantic conventions
  ([#1480](https://github.com/open-telemetry/opentelemetry-python/pull/1480))
- Allow missing carrier headers to continue without raising AttributeError
  ([#1545](https://github.com/open-telemetry/opentelemetry-python/pull/1545))

### Removed

- Remove Configuration
  ([#1523](https://github.com/open-telemetry/opentelemetry-python/pull/1523))
- Remove Metrics as part of stable, marked as experimental
  ([#1568](https://github.com/open-telemetry/opentelemetry-python/pull/1568))

## Version 0.17b0 (2021-01-20)

### Added

- Add support for OTLP v0.6.0
  ([#1472](https://github.com/open-telemetry/opentelemetry-python/pull/1472))
- Add protobuf via gRPC exporting support for Jaeger
  ([#1471](https://github.com/open-telemetry/opentelemetry-python/pull/1471))
- Add support for Python 3.9
  ([#1441](https://github.com/open-telemetry/opentelemetry-python/pull/1441))
- Added the ability to disable instrumenting libraries specified by OTEL_PYTHON_DISABLED_INSTRUMENTATIONS env variable,
  when using opentelemetry-instrument command.
  ([#1461](https://github.com/open-telemetry/opentelemetry-python/pull/1461))
- Add `fields` to propagators
  ([#1374](https://github.com/open-telemetry/opentelemetry-python/pull/1374))
- Add local/remote samplers to parent based sampler
  ([#1440](https://github.com/open-telemetry/opentelemetry-python/pull/1440))
- Add support for OTEL*SPAN*{ATTRIBUTE_COUNT_LIMIT,EVENT_COUNT_LIMIT,LINK_COUNT_LIMIT}
  ([#1377](https://github.com/open-telemetry/opentelemetry-python/pull/1377))
- Return `None` for `DictGetter` if key not found
  ([#1449](https://github.com/open-telemetry/opentelemetry-python/pull/1449))
- Added support for Jaeger propagator
  ([#1219](https://github.com/open-telemetry/opentelemetry-python/pull/1219))
- Remove dependency on SDK from `opentelemetry-instrumentation` package. The
  `opentelemetry-sdk` package now registers an entrypoint `opentelemetry_configurator`
  to allow `opentelemetry-instrument` to load the configuration for the SDK
  ([#1420](https://github.com/open-telemetry/opentelemetry-python/pull/1420))
- `opentelemetry-exporter-zipkin` Add support for array attributes in Span and Resource exports
  ([#1285](https://github.com/open-telemetry/opentelemetry-python/pull/1285))
- Added `__repr__` for `DefaultSpan`, added `trace_flags` to `__repr__` of
  `SpanContext` ([#1485](https://github.com/open-telemetry/opentelemetry-python/pull/1485))
- `opentelemetry-sdk` Add support for OTEL_TRACE_SAMPLER and OTEL_TRACE_SAMPLER_ARG env variables
  ([#1496](https://github.com/open-telemetry/opentelemetry-python/pull/1496))
- Adding `opentelemetry-distro` package to add default configuration for
  span exporter to OTLP
  ([#1482](https://github.com/open-telemetry/opentelemetry-python/pull/1482))

### Changed

- `opentelemetry-exporter-zipkin` Updated zipkin exporter status code and error tag
  ([#1486](https://github.com/open-telemetry/opentelemetry-python/pull/1486))
- Recreate span on every run of a `start_as_current_span`-decorated function
  ([#1451](https://github.com/open-telemetry/opentelemetry-python/pull/1451))
- `opentelemetry-exporter-otlp` Headers are now passed in as tuple as metadata, instead of a
  string, which was incorrect.
  ([#1507](https://github.com/open-telemetry/opentelemetry-python/pull/1507))
- `opentelemetry-exporter-jaeger` Updated Jaeger exporter status code tag
  ([#1488](https://github.com/open-telemetry/opentelemetry-python/pull/1488))
- `opentelemetry-api` `opentelemety-sdk` Moved `idsgenerator` into sdk
  ([#1514](https://github.com/open-telemetry/opentelemetry-python/pull/1514))
- `opentelemetry-sdk` The B3Format propagator has been moved into its own package: `opentelemetry-propagator-b3`
  ([#1513](https://github.com/open-telemetry/opentelemetry-python/pull/1513))
- Update default port for OTLP exporter from 55680 to 4317
  ([#1516](https://github.com/open-telemetry/opentelemetry-python/pull/1516))
- `opentelemetry-exporter-zipkin` Update boolean attribute value transformation
  ([#1509](https://github.com/open-telemetry/opentelemetry-python/pull/1509))
- Move opentelemetry-opentracing-shim out of instrumentation folder
  ([#1533](https://github.com/open-telemetry/opentelemetry-python/pull/1533))
- `opentelemetry-sdk` The JaegerPropagator has been moved into its own package: `opentelemetry-propagator-jaeger`
  ([#1525](https://github.com/open-telemetry/opentelemetry-python/pull/1525))
- `opentelemetry-exporter-jaeger`, `opentelemetry-exporter-zipkin` Update InstrumentationInfo tag keys for Jaeger and
  Zipkin exporters
  ([#1535](https://github.com/open-telemetry/opentelemetry-python/pull/1535))
- `opentelemetry-sdk` Remove rate property setter from TraceIdRatioBasedSampler
  ([#1536](https://github.com/open-telemetry/opentelemetry-python/pull/1536))
- Fix TraceState to adhere to specs
  ([#1502](https://github.com/open-telemetry/opentelemetry-python/pull/1502))
- Update Resource `merge` key conflict precedence
  ([#1544](https://github.com/open-telemetry/opentelemetry-python/pull/1544))

### Removed

- `opentelemetry-api` Remove ThreadLocalRuntimeContext since python3.4 is not supported.

## Version 0.16b1 (2020-11-26)

### Added

- Add meter reference to observers
  ([#1425](https://github.com/open-telemetry/opentelemetry-python/pull/1425))

## Version 0.16b0 (2020-11-25)

### Added

- Add optional parameter to `record_exception` method
  ([#1314](https://github.com/open-telemetry/opentelemetry-python/pull/1314))
- Add pickle support to SpanContext class
  ([#1380](https://github.com/open-telemetry/opentelemetry-python/pull/1380))
- Add instrumentation library name and version to OTLP exported metrics
  ([#1418](https://github.com/open-telemetry/opentelemetry-python/pull/1418))
- Add Gzip compression for exporter
  ([#1141](https://github.com/open-telemetry/opentelemetry-python/pull/1141))
- Support for v2 api protobuf format
  ([#1318](https://github.com/open-telemetry/opentelemetry-python/pull/1318))
- Add IDs Generator as Configurable Property of Auto Instrumentation
  ([#1404](https://github.com/open-telemetry/opentelemetry-python/pull/1404))
- Added support for `OTEL_EXPORTER` to the `opentelemetry-instrument` command
  ([#1036](https://github.com/open-telemetry/opentelemetry-python/pull/1036))

### Changed

- Change temporality for Counter and UpDownCounter
  ([#1384](https://github.com/open-telemetry/opentelemetry-python/pull/1384))
- OTLP exporter: Handle error case when no credentials supplied
  ([#1366](https://github.com/open-telemetry/opentelemetry-python/pull/1366))
- Update protobuf versions
  ([#1356](https://github.com/open-telemetry/opentelemetry-python/pull/1356))
- Add missing references to instrumented packages
  ([#1416](https://github.com/open-telemetry/opentelemetry-python/pull/1416))
- Instrumentation Package depends on the OTel SDK
  ([#1405](https://github.com/open-telemetry/opentelemetry-python/pull/1405))
- Allow samplers to modify tracestate
  ([#1319](https://github.com/open-telemetry/opentelemetry-python/pull/1319))
- Update exception handling optional parameters, add escaped attribute to record_exception
  ([#1365](https://github.com/open-telemetry/opentelemetry-python/pull/1365))
- Rename `MetricRecord` to `ExportRecord`
  ([#1367](https://github.com/open-telemetry/opentelemetry-python/pull/1367))
- Rename `Record` to `Accumulation`
  ([#1373](https://github.com/open-telemetry/opentelemetry-python/pull/1373))
- Rename `Meter` to `Accumulator`
  ([#1372](https://github.com/open-telemetry/opentelemetry-python/pull/1372))
- Fix `ParentBased` sampler for implicit parent spans. Fix also `trace_state`
  erasure for dropped spans or spans sampled by the `TraceIdRatioBased` sampler.
  ([#1394](https://github.com/open-telemetry/opentelemetry-python/pull/1394))

## Version 0.15b0 (2020-11-02)

### Added

- Add Env variables in OTLP exporter
  ([#1101](https://github.com/open-telemetry/opentelemetry-python/pull/1101))
- Add support for Jaeger Span Exporter configuration by environment variables and<br/>
  change JaegerSpanExporter constructor parameters
  ([#1114](https://github.com/open-telemetry/opentelemetry-python/pull/1114))

### Changed

- Updating status codes to adhere to specs
  ([#1282](https://github.com/open-telemetry/opentelemetry-python/pull/1282))
- Set initial checkpoint timestamp in aggregators
  ([#1237](https://github.com/open-telemetry/opentelemetry-python/pull/1237))
- Make `SpanProcessor.on_start` accept parent Context
  ([#1251](https://github.com/open-telemetry/opentelemetry-python/pull/1251))
- Fix b3 propagator entrypoint
  ([#1265](https://github.com/open-telemetry/opentelemetry-python/pull/1265))
- Allow None in sequence attributes values
  ([#998](https://github.com/open-telemetry/opentelemetry-python/pull/998))
- Samplers to accept parent Context
  ([#1267](https://github.com/open-telemetry/opentelemetry-python/pull/1267))
- Span.is_recording() returns false after span has ended
  ([#1289](https://github.com/open-telemetry/opentelemetry-python/pull/1289))
- Allow samplers to modify tracestate
  ([#1319](https://github.com/open-telemetry/opentelemetry-python/pull/1319))
- Remove TracerProvider coupling from Tracer init
  ([#1295](https://github.com/open-telemetry/opentelemetry-python/pull/1295))

## Version 0.14b0 (2020-10-13)

### Added

- Add optional parameter to `record_exception` method
  ([#1242](https://github.com/open-telemetry/opentelemetry-python/pull/1242))
- Add support for `OTEL_PROPAGATORS`
  ([#1123](https://github.com/open-telemetry/opentelemetry-python/pull/1123))
- Add keys method to TextMap propagator Getter
  ([#1196](https://github.com/open-telemetry/opentelemetry-python/issues/1196))
- Add timestamps to OTLP exporter
  ([#1199](https://github.com/open-telemetry/opentelemetry-python/pull/1199))
- Add Global Error Handler
  ([#1080](https://github.com/open-telemetry/opentelemetry-python/pull/1080))
- Add support for `OTEL_BSP_MAX_QUEUE_SIZE`, `OTEL_BSP_SCHEDULE_DELAY_MILLIS`, `OTEL_BSP_MAX_EXPORT_BATCH_SIZE`
  and `OTEL_BSP_EXPORT_TIMEOUT_MILLIS` environment variables
  ([#1105](https://github.com/open-telemetry/opentelemetry-python/pull/1120))
- Adding Resource to MeterRecord
  ([#1209](https://github.com/open-telemetry/opentelemetry-python/pull/1209))
  s

### Changed

- Store `int`s as `int`s in the global Configuration object
  ([#1118](https://github.com/open-telemetry/opentelemetry-python/pull/1118))
- Allow for Custom Trace and Span IDs Generation - `IdsGenerator` for TracerProvider
  ([#1153](https://github.com/open-telemetry/opentelemetry-python/pull/1153))
- Update baggage propagation header
  ([#1194](https://github.com/open-telemetry/opentelemetry-python/pull/1194))
- Make instances of SpanContext immutable
  ([#1134](https://github.com/open-telemetry/opentelemetry-python/pull/1134))
- Parent is now always passed in via Context, instead of Span or SpanContext
  ([#1146](https://github.com/open-telemetry/opentelemetry-python/pull/1146))
- Update OpenTelemetry protos to v0.5.0
  ([#1143](https://github.com/open-telemetry/opentelemetry-python/pull/1143))
- Zipkin exporter now accepts a `max_tag_value_length` attribute to customize the
  maximum allowed size a tag value can have.
  ([#1151](https://github.com/open-telemetry/opentelemetry-python/pull/1151))
- Fixed OTLP events to Zipkin annotations translation.
  ([#1161](https://github.com/open-telemetry/opentelemetry-python/pull/1161))
- Fixed bootstrap command to correctly install opentelemetry-instrumentation-falcon instead of
  opentelemetry-instrumentation-flask.
  ([#1138](https://github.com/open-telemetry/opentelemetry-python/pull/1138))
- Update sampling result names
  ([#1128](https://github.com/open-telemetry/opentelemetry-python/pull/1128))
- Event attributes are now immutable
  ([#1195](https://github.com/open-telemetry/opentelemetry-python/pull/1195))
- Renaming metrics Batcher to Processor
  ([#1203](https://github.com/open-telemetry/opentelemetry-python/pull/1203))
- Protect access to Span implementation
  ([#1188](https://github.com/open-telemetry/opentelemetry-python/pull/1188))
- `start_as_current_span` and `use_span` can now optionally auto-record any exceptions raised inside the context
  manager.
  ([#1162](https://github.com/open-telemetry/opentelemetry-python/pull/1162))

## Version 0.13b0 (2020-09-17)

### Added

- Add instrumentation info to exported spans
  ([#1095](https://github.com/open-telemetry/opentelemetry-python/pull/1095))
- Add metric OTLP exporter
  ([#835](https://github.com/open-telemetry/opentelemetry-python/pull/835))
- Add type hints to OTLP exporter
  ([#1121](https://github.com/open-telemetry/opentelemetry-python/pull/1121))
- Add support for OTEL_EXPORTER_ZIPKIN_ENDPOINT env var. As part of this change, the
  configuration of the ZipkinSpanExporter exposes a `url` argument to replace `host_name`,
  `port`, `protocol`, `endpoint`. This brings this implementation inline with other
  implementations.
  ([#1064](https://github.com/open-telemetry/opentelemetry-python/pull/1064))
- Zipkin exporter report instrumentation info.
  ([#1097](https://github.com/open-telemetry/opentelemetry-python/pull/1097))
- Add status mapping to tags
  ([#1111](https://github.com/open-telemetry/opentelemetry-python/issues/1111))
- Report instrumentation info
  ([#1098](https://github.com/open-telemetry/opentelemetry-python/pull/1098))
- Add support for http metrics
  ([#1116](https://github.com/open-telemetry/opentelemetry-python/pull/1116))
- Populate resource attributes as per semantic conventions
  ([#1053](https://github.com/open-telemetry/opentelemetry-python/pull/1053))

### Changed

- Refactor `SpanContext.is_valid` from a method to a data attribute
  ([#1005](https://github.com/open-telemetry/opentelemetry-python/pull/1005))
- Moved samplers from API to SDK
  ([#1023](https://github.com/open-telemetry/opentelemetry-python/pull/1023))
- Change return value type of `correlationcontext.get_correlations` to immutable `MappingProxyType`
  ([#1024](https://github.com/open-telemetry/opentelemetry-python/pull/1024))
- Sampling spec changes
  ([#1034](https://github.com/open-telemetry/opentelemetry-python/pull/1034))
- Remove lazy Event and Link API from Span interface
  ([#1045](https://github.com/open-telemetry/opentelemetry-python/pull/1045))
- Rename CorrelationContext to Baggage
  ([#1060](https://github.com/open-telemetry/opentelemetry-python/pull/1060))
- Rename HTTPTextFormat to TextMapPropagator. This change also updates `get_global_httptextformat` and
  `set_global_httptextformat` to `get_global_textmap` and `set_global_textmap`
  ([#1085](https://github.com/open-telemetry/opentelemetry-python/pull/1085))
- Fix api/sdk setup.cfg to include missing python files
  ([#1091](https://github.com/open-telemetry/opentelemetry-python/pull/1091))
- Improve BatchExportSpanProcessor
  ([#1062](https://github.com/open-telemetry/opentelemetry-python/pull/1062))
- Rename Resource labels to attributes
  ([#1082](https://github.com/open-telemetry/opentelemetry-python/pull/1082))
- Rename members of `trace.sampling.Decision` enum
  ([#1115](https://github.com/open-telemetry/opentelemetry-python/pull/1115))
- Merge `OTELResourceDetector` result when creating resources
  ([#1096](https://github.com/open-telemetry/opentelemetry-python/pull/1096))

### Removed

- Drop support for Python 3.4
  ([#1099](https://github.com/open-telemetry/opentelemetry-python/pull/1099))

## Version 0.12b0 (2020-08-14)

### Added

- Implement Views in metrics SDK
  ([#596](https://github.com/open-telemetry/opentelemetry-python/pull/596))

### Changed

- Update environment variable names, prefix changed from `OPENTELEMETRY` to `OTEL`
  ([#904](https://github.com/open-telemetry/opentelemetry-python/pull/904))
- Stop TracerProvider and MeterProvider from being overridden
  ([#959](https://github.com/open-telemetry/opentelemetry-python/pull/959))
- Update default port to 55680
  ([#977](https://github.com/open-telemetry/opentelemetry-python/pull/977))
- Add proper length zero padding to hex strings of traceId, spanId, parentId sent on the wire, for compatibility with
  jaeger-collector
  ([#908](https://github.com/open-telemetry/opentelemetry-python/pull/908))
- Send start_timestamp and convert labels to strings
  ([#937](https://github.com/open-telemetry/opentelemetry-python/pull/937))
- Renamed several packages
  ([#953](https://github.com/open-telemetry/opentelemetry-python/pull/953))
- Thrift URL for Jaeger exporter doesn't allow HTTPS (hardcoded to HTTP)
  ([#978](https://github.com/open-telemetry/opentelemetry-python/pull/978))
- Change reference names to opentelemetry-instrumentation-opentracing-shim
  ([#969](https://github.com/open-telemetry/opentelemetry-python/pull/969))
- Changed default Sampler to `ParentOrElse(AlwaysOn)`
  ([#960](https://github.com/open-telemetry/opentelemetry-python/pull/960))
- Update environment variable names, prefix changed from `OPENTELEMETRY` to `OTEL`
  ([#904](https://github.com/open-telemetry/opentelemetry-python/pull/904))
- Update environment variable `OTEL_RESOURCE` to `OTEL_RESOURCE_ATTRIBUTES` as per
  the specification

## Version 0.11b0 (2020-07-28)

### Added

- Add support for resources and resource detector
  ([#853](https://github.com/open-telemetry/opentelemetry-python/pull/853))

### Changed

- Return INVALID_SPAN if no TracerProvider set for get_current_span
  ([#751](https://github.com/open-telemetry/opentelemetry-python/pull/751))
- Rename record_error to record_exception
  ([#927](https://github.com/open-telemetry/opentelemetry-python/pull/927))
- Update span exporter to use OpenTelemetry Proto v0.4.0
  ([#872](https://github.com/open-telemetry/opentelemetry-python/pull/889))

## Version 0.10b0 (2020-06-23)

### Changed

- Regenerate proto code and add pyi stubs
  ([#823](https://github.com/open-telemetry/opentelemetry-python/pull/823))
- Rename CounterAggregator -> SumAggregator
  ([#816](https://github.com/open-telemetry/opentelemetry-python/pull/816))

## Version 0.9b0 (2020-06-10)

### Added

- Adding trace.get_current_span, Removing Tracer.get_current_span
  ([#552](https://github.com/open-telemetry/opentelemetry-python/pull/552))
- Add SumObserver, UpDownSumObserver and LastValueAggregator in metrics
  ([#789](https://github.com/open-telemetry/opentelemetry-python/pull/789))
- Add start_pipeline to MeterProvider
  ([#791](https://github.com/open-telemetry/opentelemetry-python/pull/791))
- Initial release of opentelemetry-ext-otlp, opentelemetry-proto

### Changed

- Move stateful & resource from Meter to MeterProvider
  ([#751](https://github.com/open-telemetry/opentelemetry-python/pull/751))
- Rename Measure to ValueRecorder in metrics
  ([#761](https://github.com/open-telemetry/opentelemetry-python/pull/761))
- Rename Observer to ValueObserver
  ([#764](https://github.com/open-telemetry/opentelemetry-python/pull/764))
- Log a warning when replacing the global Tracer/Meter provider
  ([#856](https://github.com/open-telemetry/opentelemetry-python/pull/856))
- bugfix: byte type attributes are decoded before adding to attributes dict
  ([#775](https://github.com/open-telemetry/opentelemetry-python/pull/775))
- Rename opentelemetry-auto-instrumentation to opentelemetry-instrumentation,
  and console script `opentelemetry-auto-instrumentation` to `opentelemetry-instrument`

## Version 0.8b0 (2020-05-27)

### Added

- Add a new bootstrap command that enables automatic instrument installations.
  ([#650](https://github.com/open-telemetry/opentelemetry-python/pull/650))

### Changed

- Handle boolean, integer and float values in Configuration
  ([#662](https://github.com/open-telemetry/opentelemetry-python/pull/662))
- bugfix: ensure status is always string
  ([#640](https://github.com/open-telemetry/opentelemetry-python/pull/640))
- Transform resource to tags when exporting
  ([#707](https://github.com/open-telemetry/opentelemetry-python/pull/707))
- Rename otcollector to opencensus
  ([#695](https://github.com/open-telemetry/opentelemetry-python/pull/695))
- Transform resource to tags when exporting
  ([#645](https://github.com/open-telemetry/opentelemetry-python/pull/645))
- `ext/boto`: Could not serialize attribute aws.region to tag when exporting via jaeger
  Serialize tuple type values by coercing them into a string, since Jaeger does not
  support tuple types.
  ([#865](https://github.com/open-telemetry/opentelemetry-python/pull/865))
- Specify to_json indent from arguments
  ([#718](https://github.com/open-telemetry/opentelemetry-python/pull/718))
- Span.resource will now default to an empty resource
  ([#724](https://github.com/open-telemetry/opentelemetry-python/pull/724))
- bugfix: Fix error message
  ([#729](https://github.com/open-telemetry/opentelemetry-python/pull/729))
- deep copy empty attributes
  ([#714](https://github.com/open-telemetry/opentelemetry-python/pull/714))

## Version 0.7b1 (2020-05-12)

### Added

- Add reset for the global configuration object, for testing purposes
  ([#636](https://github.com/open-telemetry/opentelemetry-python/pull/636))
- Add support for programmatic instrumentation
  ([#579](https://github.com/open-telemetry/opentelemetry-python/pull/579))

### Changed

- tracer.get_tracer now optionally accepts a TracerProvider
  ([#602](https://github.com/open-telemetry/opentelemetry-python/pull/602))
- Configuration object can now be used by any component of opentelemetry,
  including 3rd party instrumentations
  ([#563](https://github.com/open-telemetry/opentelemetry-python/pull/563))
- bugfix: configuration object now matches fields in a case-sensitive manner
  ([#583](https://github.com/open-telemetry/opentelemetry-python/pull/583))
- bugfix: configuration object now accepts all valid python variable names
  ([#583](https://github.com/open-telemetry/opentelemetry-python/pull/583))
- bugfix: configuration undefined attributes now return None instead of raising
  an AttributeError.
  ([#583](https://github.com/open-telemetry/opentelemetry-python/pull/583))
- bugfix: 'debug' field is now correct
  ([#549](https://github.com/open-telemetry/opentelemetry-python/pull/549))
- bugfix: enable auto-instrumentation command to work for custom entry points
  (e.g. flask_run)
  ([#567](https://github.com/open-telemetry/opentelemetry-python/pull/567))
- Exporter API: span parents are now always spancontext
  ([#548](https://github.com/open-telemetry/opentelemetry-python/pull/548))
- Console span exporter now prints prettier, more legible messages
  ([#505](https://github.com/open-telemetry/opentelemetry-python/pull/505))
- bugfix: B3 propagation now retrieves parentSpanId correctly
  ([#621](https://github.com/open-telemetry/opentelemetry-python/pull/621))
- bugfix: a DefaultSpan now longer causes an exception when used with tracer
  ([#577](https://github.com/open-telemetry/opentelemetry-python/pull/577))
- move last_updated_timestamp into aggregators instead of bound metric
  instrument
  ([#522](https://github.com/open-telemetry/opentelemetry-python/pull/522))
- bugfix: suppressing instrumentation in metrics to eliminate an infinite loop
  of telemetry
  ([#529](https://github.com/open-telemetry/opentelemetry-python/pull/529))
- bugfix: freezing span attribute sequences, reducing potential user errors
  ([#529](https://github.com/open-telemetry/opentelemetry-python/pull/529))

## Version 0.6b0 (2020-03-30)

### Added

- Add support for lazy events and links
  ([#474](https://github.com/open-telemetry/opentelemetry-python/pull/474))
- Adding is_remote flag to SpanContext, indicating when a span is remote
  ([#516](https://github.com/open-telemetry/opentelemetry-python/pull/516))
- Adding a solution to release metric handles and observers
  ([#435](https://github.com/open-telemetry/opentelemetry-python/pull/435))
- Initial release: opentelemetry-instrumentation

### Changed

- Metrics API no longer uses LabelSet
  ([#527](https://github.com/open-telemetry/opentelemetry-python/pull/527))
- Allow digit as first char in vendor specific trace state key
  ([#511](https://github.com/open-telemetry/opentelemetry-python/pull/511))
- Exporting to collector now works
  ([#508](https://github.com/open-telemetry/opentelemetry-python/pull/508))

## Version 0.5b0 (2020-03-16)

### Added

- Adding Correlation Context API/SDK and propagator
  ([#471](https://github.com/open-telemetry/opentelemetry-python/pull/471))
- Adding a global configuration module to simplify setting and getting globals
  ([#466](https://github.com/open-telemetry/opentelemetry-python/pull/466))
- Adding named meters, removing batchers
  ([#431](https://github.com/open-telemetry/opentelemetry-python/pull/431))
- Adding attach/detach methods as per spec
  ([#429](https://github.com/open-telemetry/opentelemetry-python/pull/429))
- Adding OT Collector metrics exporter
  ([#454](https://github.com/open-telemetry/opentelemetry-python/pull/454))
- Initial release opentelemetry-ext-otcollector

### Changed

- Rename metric handle to bound metric instrument
  ([#470](https://github.com/open-telemetry/opentelemetry-python/pull/470))
- Moving resources to sdk
  ([#464](https://github.com/open-telemetry/opentelemetry-python/pull/464))
- Implementing propagators to API to use context
  ([#446](https://github.com/open-telemetry/opentelemetry-python/pull/446))
- Renaming TraceOptions to TraceFlags
  ([#450](https://github.com/open-telemetry/opentelemetry-python/pull/450))
- Renaming TracerSource to TracerProvider
  ([#441](https://github.com/open-telemetry/opentelemetry-python/pull/441))
- Improve validation of attributes
  ([#460](https://github.com/open-telemetry/opentelemetry-python/pull/460))
- Re-raise errors caught in opentelemetry.sdk.trace.Tracer.use_span()
  ([#469](https://github.com/open-telemetry/opentelemetry-python/pull/469))
- Implement observer instrument
  ([#425](https://github.com/open-telemetry/opentelemetry-python/pull/425))

## Version 0.4a0 (2020-02-21)

### Added

- Added named Tracers
  ([#301](https://github.com/open-telemetry/opentelemetry-python/pull/301))
- Add int and valid sequenced to AttributeValue type
  ([#368](https://github.com/open-telemetry/opentelemetry-python/pull/368))
- Add ABC for Metric
  ([#391](https://github.com/open-telemetry/opentelemetry-python/pull/391))
- Metrics export pipeline, and stdout exporter
  ([#341](https://github.com/open-telemetry/opentelemetry-python/pull/341))
- Adding Context API Implementation
  ([#395](https://github.com/open-telemetry/opentelemetry-python/pull/395))
- Adding trace.get_tracer function
  ([#430](https://github.com/open-telemetry/opentelemetry-python/pull/430))
- Add runtime validation for set_attribute
  ([#348](https://github.com/open-telemetry/opentelemetry-python/pull/348))
- Add support for B3 ParentSpanID
  ([#286](https://github.com/open-telemetry/opentelemetry-python/pull/286))
- Implement MinMaxSumCount aggregator
  ([#422](https://github.com/open-telemetry/opentelemetry-python/pull/422))
- Initial release opentelemetry-ext-zipkin, opentelemetry-ext-prometheus

### Changed

- Separate Default classes from interface descriptions
  ([#311](https://github.com/open-telemetry/opentelemetry-python/pull/311))
- Export span status
  ([#367](https://github.com/open-telemetry/opentelemetry-python/pull/367))
- Export span kind
  ([#387](https://github.com/open-telemetry/opentelemetry-python/pull/387))
- Set status for ended spans
  ([#297](https://github.com/open-telemetry/opentelemetry-python/pull/297) and
  [#358](https://github.com/open-telemetry/opentelemetry-python/pull/358))
- Use module loggers
  ([#351](https://github.com/open-telemetry/opentelemetry-python/pull/351))
- Protect start_time and end_time from being set manually by the user
  ([#363](https://github.com/open-telemetry/opentelemetry-python/pull/363))
- Set status in start_as_current_span
  ([#377](https://github.com/open-telemetry/opentelemetry-python/pull/377))
- Implement force_flush for span processors
  ([#389](https://github.com/open-telemetry/opentelemetry-python/pull/389))
- Set sampled flag on sampling trace
  ([#407](https://github.com/open-telemetry/opentelemetry-python/pull/407))
- Add io and formatter options to console exporter
  ([#412](https://github.com/open-telemetry/opentelemetry-python/pull/412))
- Clean up ProbabilitySample for 64 bit trace IDs
  ([#238](https://github.com/open-telemetry/opentelemetry-python/pull/238))

### Removed

- Remove monotonic and absolute metric instruments
  ([#410](https://github.com/open-telemetry/opentelemetry-python/pull/410))

## Version 0.3a0 (2019-12-11)

### Added

- Add metrics exporters
  ([#192](https://github.com/open-telemetry/opentelemetry-python/pull/192))
- Implement extract and inject support for HTTP_HEADERS and TEXT_MAP formats
  ([#256](https://github.com/open-telemetry/opentelemetry-python/pull/256))

### Changed

- Multiple tracing API/SDK changes
- Multiple metrics API/SDK changes

### Removed

- Remove option to create unstarted spans from API
  ([#290](https://github.com/open-telemetry/opentelemetry-python/pull/290))

## Version 0.2a0 (2019-10-29)

### Added

- W3C TraceContext fixes and compliance tests
  ([#228](https://github.com/open-telemetry/opentelemetry-python/pull/228))
- Sampler API/SDK
  ([#225](https://github.com/open-telemetry/opentelemetry-python/pull/225))
- Initial release: opentelemetry-ext-jaeger, opentelemetry-opentracing-shim

### Changed

- Multiple metrics API/SDK changes
- Multiple tracing API/SDK changes
- Multiple context API changes
- Multiple bugfixes and improvements

## Version 0.1a0 (2019-09-30)

### Added

- Initial release api/sdk

- Use Attribute rather than boundattribute in logrecord
  ([#3567](https://github.com/open-telemetry/opentelemetry-python/pull/3567))
- Fix flush error when no LoggerProvider configured for LoggingHandler
  ([#3608](https://github.com/open-telemetry/opentelemetry-python/pull/3608))
- Fix `OTLPMetricExporter` ignores `preferred_aggregation` property
  ([#3603](https://github.com/open-telemetry/opentelemetry-python/pull/3603))
- Logs: set `observed_timestamp` field
  ([#3565](https://github.com/open-telemetry/opentelemetry-python/pull/3565))
- Add missing Resource SchemaURL in OTLP exporters
  ([#3652](https://github.com/open-telemetry/opentelemetry-python/pull/3652))
- Fix loglevel warning text
  ([#3566](https://github.com/open-telemetry/opentelemetry-python/pull/3566))
- Prometheus Exporter string representation for target_info labels
  ([#3659](https://github.com/open-telemetry/opentelemetry-python/pull/3659))
- Logs: ObservedTimestamp field is missing in console exporter output
  ([#3564](https://github.com/open-telemetry/opentelemetry-python/pull/3564))
- Fix explicit bucket histogram aggregation
  ([#3429](https://github.com/open-telemetry/opentelemetry-python/pull/3429))
- Add `code.lineno`, `code.function` and `code.filepath` to all logs
  ([#3645](https://github.com/open-telemetry/opentelemetry-python/pull/3645))
- Add Synchronous Gauge instrument
  ([#3462](https://github.com/open-telemetry/opentelemetry-python/pull/3462))
- Drop support for 3.7
  ([#3668](https://github.com/open-telemetry/opentelemetry-python/pull/3668))
- Include key in attribute sequence warning
  ([#3639](https://github.com/open-telemetry/opentelemetry-python/pull/3639))
- Upgrade markupsafe, Flask and related dependencies to dev and test
  environments ([#3609](https://github.com/open-telemetry/opentelemetry-python/pull/3609))
- Handle HTTP 2XX responses as successful in OTLP exporters
  ([#3623](https://github.com/open-telemetry/opentelemetry-python/pull/3623))
- Improve Resource Detector timeout messaging
  ([#3645](https://github.com/open-telemetry/opentelemetry-python/pull/3645))
- Add Proxy classes for logging
  ([#3575](https://github.com/open-telemetry/opentelemetry-python/pull/3575))
- Remove dependency on 'backoff' library
  ([#3679](https://github.com/open-telemetry/opentelemetry-python/pull/3679))


- Make create_gauge non-abstract method
  ([#3817](https://github.com/open-telemetry/opentelemetry-python/pull/3817))
- Make `tracer.start_as_current_span()` decorator work with async functions
  ([#3633](https://github.com/open-telemetry/opentelemetry-python/pull/3633))
- Fix python 3.12 deprecation warning
  ([#3751](https://github.com/open-telemetry/opentelemetry-python/pull/3751))
- bump mypy to 0.982
  ([#3776](https://github.com/open-telemetry/opentelemetry-python/pull/3776))
- Add support for OTEL_SDK_DISABLED environment variable
  ([#3648](https://github.com/open-telemetry/opentelemetry-python/pull/3648))
- Fix ValueError message for PeriodicExportingMetricsReader
  ([#3769](https://github.com/open-telemetry/opentelemetry-python/pull/3769))
- Use `BaseException` instead of `Exception` in `record_exception`
  ([#3354](https://github.com/open-telemetry/opentelemetry-python/pull/3354))
- Make span.record_exception more robust
  ([#3778](https://github.com/open-telemetry/opentelemetry-python/pull/3778))
- Fix license field in pyproject.toml files
  ([#3803](https://github.com/open-telemetry/opentelemetry-python/pull/3803))