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OpenTelemetry Sample

This project demonstrates how to use OpenTelemetry with .NET to collect metrics, traces, and logs, and send them to Grafana's observability stack (Mimir, Tempo, and Loki).

Architecture

The project consists of:

  • A .NET API that generates telemetry data
  • OpenTelemetry Collector that receives and forwards telemetry data
  • Grafana Mimir for metrics storage
  • Grafana Tempo for trace storage
  • Grafana Loki for log storage
  • Grafana for visualization

Getting Started

Prerequisites

  • Docker and Docker Compose
  • .NET 9.0 SDK

Running the Application

  1. Start the observability stack:

    docker-compose up -d

  2. Run the .NET API:

    cd src/OpenTelemetryDemo.API
dotnet run

  3. Access the services:

API Endpoints

  • /telemetry/test/trace - Generates a test trace
  • /telemetry/test/metric - Increments a test counter metric
  • /telemetry/test/log - Generates test log messages
  • /api/metrics/query - Query metrics from Mimir (for Power BI integration)
  • /api/metrics/test-counter - Get the test counter metric (for Power BI integration)

Power BI Integration

This project includes a custom API endpoint that allows Power BI to consume metrics data from Mimir. The endpoints return data in a format that Power BI can easily parse and visualize.