Support Telemetry Schema Url in tracing and metrics

[tarekgh]

Fixes #63651

[ghost]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[ghost]

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

[Copilot]

PR Overview

This PR adds support for a Telemetry Schema URL parameter in tracing and metrics to address #63651. The changes include introducing a TelemetrySchemaUrl property in ActivitySourceOptions, Meter, and related types; updating constructor and initialization signatures to propagate the new parameter; and adjusting MetricsEventSource event definitions and tests to include the TelemetrySchemaUrl.

Reviewed Changes

File	Description
src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/ActivitySourceOptions.cs	Added TelemetrySchemaUrl property to options used for ActivitySource creation
src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/Meter.cs	Updated initialization and constructors to include telemetrySchemaUrl parameter
src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/ActivitySource.cs	Updated ActivitySource constructors and properties to propagate TelemetrySchemaUrl
src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/MeterOptions.cs	Added TelemetrySchemaUrl property to MeterOptions
src/libraries/System.Diagnostics.DiagnosticSource/tests/MetricEventSourceTests.cs	Updated Meter creation in tests to supply the new TelemetrySchemaUrl value
src/libraries/System.Diagnostics.DiagnosticSource/tests/ActivitySourceTests.cs	Added TelemetrySchemaUrl assertions in ActivitySource tests
src/libraries/System.Diagnostics.DiagnosticSource/ref/System.Diagnostics.DiagnosticSourceActivity.cs	Updated reference definitions to expose TelemetrySchemaUrl property and overloads
src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/Metrics/MetricsEventSource.cs	Updated event methods to include TelemetrySchemaUrl in event logging
src/libraries/System.Diagnostics.DiagnosticSource/tests/MetricsTests.cs	Updated meter creation tests to check TelemetrySchemaUrl handling

Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.

[tarekgh]

CC @noahfalk @lmolkova @samsp-msft @CodeBlanch @rajkumar-rangaraj

[tarekgh]

/azp run runtime-libraries-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[tarekgh]

/azp run runtime-libraries-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[CodeBlanch]

LGTM

[samsp-msft]

So what is required for this to work end to end? Is more needed from the OTel SDK and the OTLP exporter?

[tarekgh]

So what is required for this to work end to end? Is more needed from the OTel SDK and the OTLP exporter?

Yes. @lmolkova is following up and planning to use it in E2E scenario.

[CodeBlanch]

So what is required for this to work end to end? Is more needed from the OTel SDK and the OTLP exporter?

Ya OTel SDK will need to be updated to set these new SchemaUrl properties on the instrumentation scope when serializing. For example here is where we handle ActivitySource Version + Tags: https://github.com/open-telemetry/opentelemetry-dotnet/blob/1b555c1201413f2f55f2cd3c4ba03ef4b615b6b5/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/Implementation/Serializer/ProtobufOtlpTraceSerializer.cs#L127-L132

[rajkumar-rangaraj]

LGTM

[Kielek]

🎉 Great to see this!