Ben

I found this while searching for information about adding spans to subrequests. In my situation: `frontend -> nginx -> 2 subrequests -> proxy to backend`

@p-pautov yes it is indeed for authentication (oauth2) and authorization (opa). I'd like those 2 sub_requests to get recorded as well.

Yeah that would work well

> @bmerigan could you include these attributes using the `otel_span_attr` directive? Assuming of course you can get those attributes as a variable in nginx. I do use the `otel_span_attr` for...