aiohttp-server: pass request attributes at span creation (#4118)

* aiohttp-server: pass request attributes at span creation

To easy sampling work.

* Add changelog

Author: xrmx

CHANGELOG.md

@@ -43,6 +43,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#4119](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4119))
 - `opentelemetry-instrumentation`: add database stability attribute setters in `_semconv` utilities
   ([#4108](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4108))
+- `opentelemetry-instrumentation-aiohttp-server`: pass request attributes at span creation
+  ([#4118](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4118))
 - `opentelemetry-instrumentation-tornado`: Implement new semantic convention opt-in migration
   ([#3993](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3993))
 - `opentelemetry-instrumentation-tornado`: pass request attributes at span creation

instrumentation/opentelemetry-instrumentation-aiohttp-server/src/opentelemetry/instrumentation/aiohttp_server/__init__.py

@@ -468,13 +468,12 @@ async def _middleware(request, handler):
             span_name,
             context=extract(request, getter=getter),
             kind=trace.SpanKind.SERVER,
+            attributes=request_attrs,
         ) as span:
             if span.is_recording():
-                request_headers_attributes = (
+                span.set_attributes(
                     collect_request_headers_attributes(request)
                 )
-                request_attrs.update(request_headers_attributes)
-                span.set_attributes(request_attrs)
             start = default_timer()
             active_requests_counter.add(1, active_requests_count_attrs)
             try: