OpenTelemetry - CNCF/opentelemetry-cpp: Release v1.8.0

Name: opentelemetry-cpp

Owner: OpenTelemetry - CNCF

Release: OpenTelemetry C++ v1.8.0

Released: 2022-11-27

License: Apache-2.0

Release Assets:

v1.8.0 release

Release of core packages

  • opentelemetry-api
  • opentelemetry-sdk

and exporter packages:

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

API

  • No API change

SDK

  • Fix GlobalLogHandler singleton creation order by @lalitb in #1767

Exporter

  • [ETW Exporter] Fix span timestamp(s) precision to nanoseconds by @lalitb in #1726
  • [Prometheus Exporter] add fix for prometheus exporter build by @rochaudhari in #1795
  • Fix session lock of OtlpHttpClient by @owent in #1760
  • Add status code to OTLP grpc trace log by @ThomsonTan in #1792

Build

  • Multiple CURL packages leads to invalid build (#1738) by @marcalff in #1739
  • Bring your own dependency: opentelemetry-proto by @marcalff in #1730
  • bump to gRPC v1.48.1 for bazel CIs by @esigo in #1786
  • Fix clang-format in CI by @marcalff in #1796
  • Fix CI build by @marcalff in #1798
  • Fix CI benchmark by @marcalff in #1799
  • Add option WITH_BENCHMARK to disable building benchmarks by @ThomsonTan in #1794
  • Upgrade bazel build to use abseil-cpp-20220623.1 by @marcalff in #1779
  • Fix benchmark CI by @esigo in #1808
  • Bump abseil-cpp for cmake CI by @esigo in #1807

Metrics

  • Remove old metric from GitHub CI by @lalitb in #1733
  • Cleanup of old _metric api/sdk by @esigo in #1734
  • Cleanup ENABLE_METRICS_PREVIEW by @esigo in #1735
  • Change Prometheus CMake target name by @lalitb in #1765
  • Add MeterContext::ForEachMeter() method to process callbacks on Meter in thread-safe manner by @lalitb in #1783

Logs

  • LogProcessor, LogExporter changes by @owent in #1727
  • LogProcessor, LogExporter class name by @esigo in #1736

Sementic Convention

  • [SEMANTIC CONVENTIONS] Upgrade to version 1.15.0 by @marcalff in #1761
  • [Deprecation] Deprecate experimental semantic conventions (#1742) by @marcalff in #1744

Documentation

  • Update Metrics status in README.md by @lalitb in #1722
  • Remove misleading comments about ABI compatibility for nostd::span by @marcalff in #1731
  • Cleanup ENABLE_METRICS_PREVIEW by @marcalff in #1745
  • Format config options in OTLP exporter readme by @ThomsonTan in #1748
  • Cleanup INSTALL.md by @ThomsonTan in #1757
  • Document that clang-format version 10.0 is used. by @marcalff in #1782

New Contributors

  • @rochaudhari made their first contribution in #1795

Full Changelog: https://github.com/open-telemetry/opentelemetry-cpp/compare/v1.7.0...v1.8.0

Notes:

Deprecation notes:

  • [Deprecation] Deprecate experimental semantic conventions #1744

    • The file api/include/opentelemetry/trace/experimental_semantic_conventions.h is deprecated, and will be removed in a future release. Use file api/include/opentelemetry/trace/semantic_conventions.h instead.

    • The file sdk/include/opentelemetry/sdk/resource/experimental_semantic_conventions.h is deprecated, and will be removed in a future release. Use file sdk/include/opentelemetry/sdk/resource/semantic_conventions.h instead.

    • The function, declared in the global namespace uint32_t hashCode(const char *str, uint32_t h = 0) is deprecated, and will be removed in a future release. No replacement will be provided. Note that function opentelemetry::utils::hashCode, declared in the ETW exporter, is not affected by this deprecation.

Breaking changes:

  • [SEMANTIC CONVENTIONS] Upgrade to version 1.15.0 #1761
    • Naming of semantic conventions has changed from uppercase constants, like SemanticConventions::SERVICE_NAME, to camel case, like SemanticConventions::kServiceName. This is necessary to avoid collisions with macros in general, which breaks the build on some platforms.
    • Semantic conventions are flagged as experimental, which is why this change is done in this release.
  • [METRICS] Old metrics implementation including API, SDK and Exporters removed.

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