example using a custom TracerProvider with FastAPI instrumentation?

[morrissimo]

Can someone point me to an example of how one should provide a custom TracerProvider to the FastAPI instrumentor? It seemed straightforward at first, but I'm seeing strange side effects when using a custom provider - most notably, excluded URLs not being respected by start_as_current_span() blocks

def initialize_otel() -> TracerProvider:
    tracer_provider = TracerProvider(resource=Resource.create({SERVICE_NAME: settings.otel.service_name}))
    trace.set_tracer_provider(tracer_provider)
    tracer_provider.add_span_processor(
        BatchSpanProcessor(
            OTLPSpanExporter(
                headers=[("x-honeycomb-team", settings.otel.honeycomb.api_key)],
                endpoint=settings.otel.endpoint,
            )
        )
    )

    if settings.otel.add_console_exporter:
        tracer_provider.add_span_processor(SimpleSpanProcessor(ConsoleSpanExporter()))

    return tracer_provider

app = FastAPI()

if not settings.otel.disabled:
    tracer_provider = initialize_otel()
    FastAPIInstrumentor.instrument_app(app, tracer_provider=tracer_provider, excluded_urls=settings.otel.excluded_urls)

Thanks!