Implementation Overview

• Instrumentor wraps:
• gunicorn.workers.base.Worker.__init__ → span gunicorn.worker.init
• SyncWorker.handle_request / ThreadWorker.handle_request → span gunicorn.request.{method}
• Span attributes:
• HTTP: http.method, http.url.path, http.status_code
• Worker: worker.pid, worker.id
• Metrics (OpenTelemetry Metrics API):
• Counter: gunicorn.requests
• Histogram: gunicorn.request.duration (seconds)
• ObservableGauges: gunicorn.worker.cpu.percent, gunicorn.worker.memory.rss
• Enable worker gauges with OTEL_GUNICORN_TRACE_WORKERS=true.

Example span (request):

name: gunicorn.request.get
attributes:
  http.method: GET
  http.url.path: /
  worker.pid: 12345
  worker.id: worker_0

See full details previously in IMPLEMENTATION.md; this page is the concise reference.