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git.stella-ops.org/docs/features/unchecked/telemetry/opentelemetry-integration.md

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OpenTelemetry Integration

Module

Telemetry

Status

IMPLEMENTED

Description

OpenTelemetry-based telemetry infrastructure with configurable options and custom exporters including TTE percentile exporter.

Implementation Details

  • StellaOpsTelemetryOptions: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/StellaOpsTelemetryOptions.cs -- configurable OTEL options with CollectorOptions for endpoint, protocol, and component
  • TelemetryServiceCollectionExtensions: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TelemetryServiceCollectionExtensions.cs -- DI registration for OTEL tracing, metrics, and logging
  • TelemetryApplicationBuilderExtensions: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TelemetryApplicationBuilderExtensions.cs -- middleware pipeline integration
  • TelemetryServiceDescriptor: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TelemetryServiceDescriptor.cs -- service identity for telemetry tagging
  • TelemetrySignal: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TelemetrySignal.cs -- signal types (traces, metrics, logs)
  • TtePercentileExporter: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/TtePercentileExporter.cs -- custom OTEL exporter for TTE percentile metrics
  • GoldenSignalMetrics: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/GoldenSignalMetrics.cs -- golden signal metrics (latency, traffic, errors, saturation)
  • GrpcContextInterceptors: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core/GrpcContextInterceptors.cs -- gRPC telemetry interceptors
  • Tests: src/Telemetry/StellaOps.Telemetry.Core/StellaOps.Telemetry.Core.Tests/GoldenSignalMetricsTests.cs
  • Source: Feature matrix scan

E2E Test Plan

  • Verify OTEL traces are exported with correct service identity and span attributes
  • Test OTEL metrics export includes golden signal metrics (latency, traffic, errors, saturation)
  • Verify TTE percentile exporter publishes p50/p90/p99 buckets
  • Test gRPC interceptors propagate trace context across service boundaries
  • Verify collector endpoint configuration respects sealed mode restrictions