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How do we automatically trace MongoDB queries in a C# .NET Core application using OpenTelemetry?

I've set up observability of a C# .NET Core app within a Kubernetes cluster using a self-hosted Grafana LGTM (without Mimir) stack. OpenTelemetry sends data to Prometheus and is later viewed in a Grafana Tempo dashboard.

1. Install kube-prometheus-stack
2. Install opentelemetry-operator
3. Add Kubernetes CDR OpenTelemetry Collector
4. Add Kubernetes CDR OpenTelemetry .NET AutoInstrumentation
5. Add .NET OpenTelemetry.AutoInstrumentation package
6. Add .NET MongoDB.Driver.Core.Extensions.DiagnosticSource package

✅ Expectation MongoDB traces are seen in the OpenTelemetry request trace.

❌ Reality MongoDB activity is invisible to Grafana Tempo:

How do we automatically trace MongoDB queries in a C# .NET Core application using OpenTelemetry?

I've set up observability of a C# .NET Core app within a Kubernetes cluster using a self-hosted Grafana LGTM (without Mimir) stack. OpenTelemetry sends data to Prometheus and is later viewed in a Grafana Tempo dashboard.

1. Install kube-prometheus-stack
2. Install opentelemetry-operator
3. Add Kubernetes CDR OpenTelemetry Collector
4. Add Kubernetes CDR OpenTelemetry .NET AutoInstrumentation
5. Add .NET OpenTelemetry.AutoInstrumentation package
6. Add .NET MongoDB.Driver.Core.Extensions.DiagnosticSource package

✅ Expectation MongoDB traces are seen in the OpenTelemetry request trace.

❌ Reality MongoDB activity is invisible to Grafana Tempo:

• c#
• mongodb
• kubernetes
• .net-core
• open-telemetry

Share Improve this question Follow asked Jan 22 at 14:19 MischievousChildMischievousChild 15122 silver badges1010 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

Have you configured it properly?

var clientSettings = MongoClientSettings.FromUrl(mongoUrl);
var options = new InstrumentationOptions { CaptureCommandText = true };
clientSettings.ClusterConfigurator = cb => cb.Subscribe(new DiagnosticsActivityEventSubscriber(options));
var mongoClient = new MongoClient(clientSettings);

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