Aspire dashboard

The telemetry example is set up for the standalone Aspire dashboard.

Run

aspire-dashboard -s false
dotnet run --project src\examples\Rowles.LeanLucene.Example.Telemetry

Open http://localhost:18888 for the dashboard.

Why -s false

Aspire Runner defaults to HTTPS for OTLP. The example profile uses:

OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4317
OTEL_EXPORTER_OTLP_PROTOCOL=grpc

Those settings need a plain HTTP OTLP endpoint. Without -s false, traces and metrics will not reach the dashboard.

What should appear

• Traces for search, commit, flush and merge work.
• Metrics for search, cache, commit, merge and HNSW work.
• Structured logs from the example worker.

If console exporter output appears but Aspire is empty, telemetry is being created and the issue is the OTLP connection.

See also

• OpenTelemetry