.NET OpenTelemetry Demo

If you've landed here, you've probably just listened to me speak. I hope it wasn't too boring!

The accompanying blog article series on The Modern Observability Problem and OpenTelemetry.

This is a small demo consisting 4 Docker containers:

• 2 x .NET 6 web apps
• An OpenTelemetry Collector
• Jaeger

And a Application Insights instance in Azure.

Prerequisites and setup

You will need an Azure subscription. You can get a free account here.

1. In your Azure subscription, create a new Application Insights instance.

2. Add the instrumentation key from that instance to otel-collector-config.yml :

exporters:
  azuremonitor:
    instrumentation_key: <paste key here>

3. Add the full Application Insights connection string to appsettings.json in Service B:

  "ApplicationInsights": {
    "ConnectionString": <paste connection string here>
  }  

Running the demo

Build and start the containers using start.bat.

When the containers are running, visit the URL http://localhost:5001/ping. This will call Service B on http://localhost:6001/ping to demonstrate the end-to-end telemetry.

Some calls Service B are set to throw exceptions to generate examples if errors also.