v1.10.0 release

Release of core packages

• opentelemetry-api
• opentelemetry-sdk

and exporter packages:

• opentelemetry-exporter-otlp (gRPC + HTTP/JSON)
• opentelemetry-exporter-prometheus

REMOVAL

• [REMOVAL] Remove the jaeger exporter #2031

CI

• [CI] Add a C++11 build #2152

• [CI] Add Include what you use #2214

• [CI] opentelemetry-cpp project CI #2071

• [CI] Do not tag pull_request with the "need-triage" label #2228

BUILD

• [BUILD] Fixing CMake to build GTest on Windows #1887

• [BUILD] Remove option WITH_OTLP #2161

• [BUILD] Link to opentelemetry_logs even without OTLP #2177

• [BUILD] Avoid dependency on protobuf from the OTLP HTTP metrics exporter header #2179

• [BUILD] Add ctime header to metrics_exporter.cc #2187

• [BUILD] Fix the exported symbol name for 32-bit win32 DLL #2190

• [BUILD] Upgrade to opentelemetry-proto 0.20.0 #2195

• [BUILD] SDK Header files cleanup, use forward declarations #2182

• [BUILD] Enable building otel-cpp extensions from main repo #1937

• [BUILD] Fix if check on environment variable and add CMake variable #2207

• [BUILD] Add OPENTELEMETRY_CPP_FOUND into cmake CONFIG file #2215

• [BUILD] Upgrade opentelemetry-proto to 1.0.0 #2216

• [BUILD] Include nostd/string_view which is used in severity.h #2219

TEST

• [TEST] Expand api singleton test to cover explicit dlopen() #2164

API

• [API] Remove include_trace_context #2194

• [API] Remove Meters #2205

SDK

• [SDK] Add AdaptingCircularBufferCounter for exponential histograms #2158

• [SDK] Add base2 exponential histogram indexer #2173

• [SDK] Simplify SDK version #2180

• [SDK] Add benchmark for base2 exponential histogram indexer #2181

• [SDK] Provide builders to avoid exposing Metrics SDK internals #2189

• [SDK] MeterProvider should own MeterContext, not share it #2218

• [SDK] TracerProvider should own TracerContext, not share it #2221

EXPORTER

• [EXPORTER] Change OTLP Json field name to camelCase #2162

• [EXPORTER] Support empty arrays in OtlpRecordable attributes #2166

• [EXPORTER] set is_monotonic only for instrument type kCounter #2171

• [EXPORTER] Fixed HTTP CURL for 32bits platforms #2178

• [EXPORTER] Fix OTLP HTTP exporting in sync mode #2193

• [EXPORTER] Prometheus exporter sanitizes invalid characters #1934

• [EXPORTER] Prometheus: Error on ingesting samples with different value but same timestamp #2200

• [EXPORTER] OTLP GRPC mTLS support #2120

DOC

• [DOC] Small fix for Histogram documentation #2156

• [DOC] Move Reiley Yang to emeritus #2198

Important changes

• [API] Remove Meters #2205
  • The CMake option WITH_REMOVE_METER_PREVIEW was added.
  • This option is experimental, and may change in the future.
  • Enabling it is an ABI breaking change.

Breaking changes

• [REMOVAL] Remove the jaeger exporter #2031

  • The CMake WITH_JAEGER option has been removed
  • Please remove usage of WITH_JAEGER from user scripts and makefiles.

• [SDK] MeterProvider should own MeterContext, not share it #2218

  • The MeterProvider constructor now takes a unique_ptr on MeterContext, instead of a shared_ptr.
  • Please adjust SDK configuration code accordingly.

• [SDK] TracerProvider should own TracerContext, not share it #2221

  • The TracerProvider constructor now takes a unique_ptr on TracerContext, instead of a shared_ptr.
  • The LoggerProvider constructor now takes a unique_ptr on LoggerContext, instead of a shared_ptr.
  • Please adjust SDK configuration code accordingly.

All Deprecations

• C++11 support is to end, C++14 will be supported instead, see DEPRECATED for details.

New Contributors

• @bachittle made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/1887
• @mbrobbel made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2166
• @euroelessar made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2158
• @jaelrod made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2171
• @kylepl made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2120

Full Changelog: https://github.com/open-telemetry/opentelemetry-cpp/compare/v1.9.1...v1.10.0