v1.16.1 release

Release of core packages

• opentelemetry-api
• opentelemetry-sdk

and exporter packages:

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

What's Changed

• [BUILD] Add bazel missing BUILD file by @tdat00 in https://github.com/open-telemetry/opentelemetry-cpp/pull/2720
• [SDK] Added reserve for spans array in BatchSpanProcessor. by @msiddhu in https://github.com/open-telemetry/opentelemetry-cpp/pull/2724
• [DOC] Update "Using triplets" section in building-with-vcpkg documentation. by @Pravila00 in https://github.com/open-telemetry/opentelemetry-cpp/pull/2726
• [DOC] Remove comment for unused LoggerProvider initialization params by @herman5 in https://github.com/open-telemetry/opentelemetry-cpp/pull/2972
• [SECURITY] Remove OTLP HTTP support for TLS 1.0 and TLS 1.1, require TLS 1.2 by @marcalff in https://github.com/open-telemetry/opentelemetry-cpp/pull/2722
• [TEST] Fix opentelemetry-collector bind address by @marcalff in https://github.com/open-telemetry/opentelemetry-cpp/pull/2989
• [EXPORTER] Fix references in AttributeValueVisitor by @meastp in https://github.com/open-telemetry/opentelemetry-cpp/pull/2985
• [Code health] include-what-you-use cleanup, part 2 by @marcalff in https://github.com/open-telemetry/opentelemetry-cpp/pull/2704
• [Code Health] clang-tidy cleanup, part 1 by @msiddhu in https://github.com/open-telemetry/opentelemetry-cpp/pull/2990
• [CI] Build failures with ABSEIL 20240116 and CMAKE 3.30 by @marcalff in https://github.com/open-telemetry/opentelemetry-cpp/pull/3002
• [CI] Enable bzlmod by @keith in https://github.com/open-telemetry/opentelemetry-cpp/pull/2995
• [Metrics SDK] Fix hash calculation for nostd::string by @lalitb in https://github.com/open-telemetry/opentelemetry-cpp/pull/2999
• [RELEASE] Release opentelemetry-cpp version 1.16.1 by @marcalff in https://github.com/open-telemetry/opentelemetry-cpp/pull/3007

Breaking changes

• [SECURITY] Remove OTLP HTTP support for TLS 1.0 and TLS 1.1, require TLS 1.2 or better #2722
  • The OTLP HTTP exporter no longer accept options like:
    • min_TLS = 1.0
    • min_TLS = 1.1
    • max_TLS = 1.0
    • max_TLS = 1.1
  • When connecting to an OTLP HTTP endpoint, using https, the connection will require TLS 1.2 by default, unless min_TLS is set to 1.3
  • Plain http connections (insecure) are not affected.

New Contributors

• @tdat00 made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2720
• @msiddhu made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2724
• @Pravila00 made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2726
• @herman5 made their first contribution in https://github.com/open-telemetry/opentelemetry-cpp/pull/2972

Full Changelog: https://github.com/open-telemetry/opentelemetry-cpp/compare/v1.16.0...v1.16.1