botocore: Add support for SNS semantic convention attribute aws.sns.topic.arn

CHANGELOG.md

@@ -44,6 +44,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3366](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3366))
 - `opentelemetry-instrumentation`: add support for  `OTEL_PYTHON_AUTO_INSTRUMENTATION_EXPERIMENTAL_GEVENT_PATCH` to inform opentelemetry-instrument about gevent monkeypatching
   ([#3699](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3699))
+- `opentelemetry-instrumentation-botocore`: Add support for SNS semantic convention attribute aws.sns.topic.arn
+  ([#3734](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3734))
 
 ## Version 1.36.0/0.57b0 (2025-07-29)
 

instrumentation/opentelemetry-instrumentation-botocore/src/opentelemetry/instrumentation/botocore/extensions/sns.py

@@ -24,6 +24,10 @@
     _AwsSdkCallContext,
     _AwsSdkExtension,
     _BotocoreInstrumentorContext,
+    _BotoResultT,
+)
+from opentelemetry.semconv._incubating.attributes.aws_attributes import (
+    AWS_SNS_TOPIC_ARN,
 )
 from opentelemetry.semconv.trace import (
     MessagingDestinationKindValues,
@@ -161,6 +165,9 @@ def __init__(self, call_context: _AwsSdkCallContext):
 
     def extract_attributes(self, attributes: _AttributeMapT):
         attributes[SpanAttributes.MESSAGING_SYSTEM] = "aws.sns"
+        topic_arn = self._call_context.params.get("TopicArn")
+        if topic_arn:
+            attributes[AWS_SNS_TOPIC_ARN] = topic_arn
 
         if self._op:
             self._op.extract_attributes(self._call_context, attributes)
@@ -170,3 +177,16 @@ def before_service_call(
     ):
         if self._op:
             self._op.before_service_call(self._call_context, span)
+
+    def on_success(
+        self,
+        span: Span,
+        result: _BotoResultT,
+        instrumentor_context: _BotocoreInstrumentorContext,
+    ):
+        if not span.is_recording():
+            return
+
+        topic_arn = result.get("TopicArn")
+        if topic_arn:
+            span.set_attribute(AWS_SNS_TOPIC_ARN, topic_arn)

instrumentation/opentelemetry-instrumentation-botocore/tests/test_botocore_sns.py

@@ -21,6 +21,9 @@
 from moto import mock_aws
 
 from opentelemetry.instrumentation.botocore import BotocoreInstrumentor
+from opentelemetry.semconv._incubating.attributes.aws_attributes import (
+    AWS_SNS_TOPIC_ARN,
+)
 from opentelemetry.semconv.trace import (
     MessagingDestinationKindValues,
     SpanAttributes,
@@ -151,6 +154,10 @@ def test_publish_injects_span(self):
         )
 
         span = self.assert_span(f"{self.topic_name} send")
+        self.assertEqual(
+            topic_arn,
+            span.attributes[AWS_SNS_TOPIC_ARN],
+        )
         self.assert_injected_span(message_attrs, span)
 
     def test_publish_batch_to_topic(self):
@@ -188,6 +195,10 @@ def test_publish_batch_to_topic(self):
             MessagingDestinationKindValues.TOPIC.value,
             span.attributes[SpanAttributes.MESSAGING_DESTINATION_KIND],
         )
+        self.assertEqual(
+            topic_arn,
+            span.attributes[AWS_SNS_TOPIC_ARN],
+        )
         self.assertEqual(
             topic_arn,
             span.attributes[SpanAttributes.MESSAGING_DESTINATION],
@@ -199,3 +210,16 @@ def test_publish_batch_to_topic(self):
 
         self.assert_injected_span(message1_attrs, span)
         self.assert_injected_span(message2_attrs, span)
+
+    @mock_aws
+    def test_create_topic_span(self):
+        _ = self.client.create_topic(Name=self.topic_name)
+        spans = self.memory_exporter.get_finished_spans()
+        self.assertEqual(1, len(spans))
+        span = spans[0]
+        self.assertEqual(SpanKind.CLIENT, span.kind)
+        self.assertEqual("SNS.CreateTopic", span.name)
+        self.assertEqual(
+            self.topic_arn,
+            span.attributes[AWS_SNS_TOPIC_ARN],
+        )