lambda: include xray source attribute on Link from _X_AMZN_TRACE_ID

Author: tsloughter

instrumentation/opentelemetry-instrumentation-aws-lambda/src/opentelemetry/instrumentation/aws_lambda/__init__.py

@@ -190,7 +190,7 @@ def _determine_links() -> Optional[Sequence[Link]]:
 
         span_context = get_current_span(env_context).get_span_context()
         if span_context.is_valid:
-            links = [Link(span_context)]
+            links = [Link(span_context, {"source": "x-ray-env"})]
 
     return links
 

instrumentation/opentelemetry-instrumentation-aws-lambda/tests/test_aws_lambda_instrumentation_manual.py

@@ -252,12 +252,14 @@ class TestCase:
                 name="valid_xray_trace",
                 context={},
                 expected_link_trace_id=MOCK_XRAY_TRACE_ID,
+                expected_link_attributes={"source": "x-ray-env"},
                 xray_traceid=MOCK_XRAY_TRACE_CONTEXT_SAMPLED,
             ),
             TestCase(
                 name="invalid_xray_trace",
                 context={},
                 expected_link_trace_id=None,
+                expected_link_attributes={},
                 xray_traceid=f"0",
             ),
         ]
@@ -287,6 +289,9 @@ class TestCase:
                 self.assertEqual(
                     link.context.trace_id, test.expected_link_trace_id
                 )
+                self.assertEqual(
+                    link.attributes, test.expected_link_attributes
+                )
 
             self.memory_exporter.clear()
             AwsLambdaInstrumentor().uninstrument()