This is a minimal ASP.NET Core Web API project demonstrating how to implement OpenTelemetry for distributed tracing, metrics, and structured logging. The project includes custom middleware for logging HTTP requests and responses, and is fully containerized with Docker.

• ✅ OpenTelemetry integration with:
  • Logs
  • Metrics
  • Traces
• ✅ Custom middleware for logging request/response bodies
• ✅ Configurable via appsettings.json
• ✅ Docker support
• ✅ Clean and extendable structure

├── Controllers/
│   └── WeatherForecastController.cs
├── Middleware/
│   └── RequestResponseLoggingMiddleware.cs
├── Configuration/
│   ├── OpenTelemetryConfig.cs
│   └── OpenTelemetryLoggingConfig.cs
├── Program.cs
├── appsettings.json
├── Dockerfile

• .NET 8 SDK
• Docker (optional)

dotnet restore
dotnet run

The API will be available at https://localhost:5001 (or http://localhost:5000).

docker build -t otel-sample .
docker run -p 5000:80 otel-sample

All OpenTelemetry-related configuration can be found and customized in:

• appsettings.json
• Configuration/OpenTelemetryConfig.cs
• Configuration/OpenTelemetryLoggingConfig.cs

• Tracing, logging, and metrics are configured via OpenTelemetry SDK.
• Middleware RequestResponseLoggingMiddleware captures full HTTP traffic.
• Metrics and traces are automatically collected from built-in .NET instrumentation.

• ASP.NET Core 8
• OpenTelemetry
• Serilog (optional for structured logging)
• Docker

This project is open-sourced for learning purposes. You are free to fork and modify it.

Feel free to suggest improvements or open issues. Happy tracing! 🚀