feat(opentelemetry): add request_tag to span attributes

Author: sinhasubham

google/cloud/spanner_v1/_helpers.py

@@ -35,16 +35,16 @@
 from google.cloud.spanner_v1.data_types import JsonObject, Interval
 from google.cloud.spanner_v1.request_id_header import with_request_id
 from google.cloud.spanner_v1.types import TypeCode
-from opentelemetry.semconv.resource import ResourceAttributes
-from opentelemetry.resourcedetector.gcp_resource_detector import (
-    GoogleCloudResourceDetector,
-)
 
 from google.rpc.error_details_pb2 import RetryInfo
 
 try:
     from opentelemetry.propagate import inject
     from opentelemetry.propagators.textmap import Setter
+    from opentelemetry.semconv.resource import ResourceAttributes
+    from opentelemetry.resourcedetector.gcp_resource_detector import (
+        GoogleCloudResourceDetector,
+    )
 
     HAS_OPENTELEMETRY_INSTALLED = True
 except ImportError:

tests/system/test_session_api.py

@@ -354,6 +354,7 @@ def _make_attributes(db_instance, **kwargs):
         "db.url": "spanner.googleapis.com",
         "net.host.name": "spanner.googleapis.com",
         "db.instance": db_instance,
+        "cloud.region": "global",
         "gcp.client.service": "spanner",
         "gcp.client.version": ot_helpers.LIB_VERSION,
         "gcp.client.repo": "googleapis/python-spanner",