Added

• Add client metric support to go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp. (#4707)
• Add peer attributes to spans recorded by NewClientHandler, NewServerHandler in go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc. (#4873)
• Add support for cloud.account.id, cloud.availability_zone and cloud.region in the AWS ECS detector. (#4860)

Changed

• The fallback options in go.opentelemetry.io/contrib/exporters/autoexport now accept factory functions. (#4891)
  • WithFallbackMetricReader(metric.Reader) MetricOption is replaced with func WithFallbackMetricReader(func(context.Context) (metric.Reader, error)) MetricOption.
  • WithFallbackSpanExporter(trace.SpanExporter) SpanOption is replaced with WithFallbackSpanExporter(func(context.Context) (trace.SpanExporter, error)) SpanOption.
• The http.server.request_content_length metric in go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp is changed to http.server.request.size.(#4707)
• The http.server.response_content_length metric in go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp is changed to http.server.response.size.(#4707)

Deprecated

• The RequestCount, RequestContentLength, ResponseContentLength, ServerLatency constants in go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp are deprecated. (#4707)

Fixed

• Do not panic in go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc if MeterProvider returns a nil instrument. (#4875)

New Contributors

• @acpana made their first contribution in https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4831
• @hiroyaonoe made their first contribution in https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4704
• @hcelaloner made their first contribution in https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4891

Full Changelog: https://github.com/open-telemetry/opentelemetry-go-contrib/compare/v1.22.0...v1.23.0