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Tracing

Jaeger

If Jaeger is configured (using the useJaeger site configuration) property, every HTTP response will include an X-Trace header with a link to the trace for that request. Inspecting the spans and logs attached to the trace will help identify the problematic service or dependency.

Set up Jaeger

If you are using the single Docker container or Docker Compose deployment method for Sourcegraph, refer to the official Jaeger documentation for guidance. Note that you have two options:

  • Run Jaeger using the all-in-one container
  • Run the constituent services of Jaeger (jaeger-agent, jaeger-collector, jaeger-query, optionally jaeger-ingester) separately.
    • If running separately, you must choose which type of storage (e.g., Cassandra, Elasticsearch, memory) is used to store Jaeger spans.

If you are using Kubernetes, you can refer to these docs on how to run Jaeger in the Sourcegraph cluster.

Accessing Jaeger

If you are using the single Docker container or Docker Compose deployment, you'll need to make the Jaeger UI (jaeger-query) accessible to site admins.

If you are using Kubernetes and have followed the recommended docs above to run Jaeger in the Sourcegraph cluster, you can access the the Jaeger UI with port-forwarding at http://localhost:16686/:

kubectl port-forward svc/jaeger-query 16686

Viewing Go net/trace information

Site admins can access Go net/trace information at https://sourcegraph.example.com/-/debug/. From there, click Requests to view the traces for that service.