fix missing attributes in RedisCluster spans

Author: a-cid

instrumentation/opentelemetry-instrumentation-redis/src/opentelemetry/instrumentation/redis/__init__.py

@@ -128,6 +128,8 @@ def response_hook(span, instance, response):
 
 
 def _set_connection_attributes(span, conn):
+ if hasattr(conn, "nodes_manager"):
+ conn = conn.nodes_manager.default_node.redis_connection
  if not span.is_recording() or not hasattr(conn, "connection_pool"):
  return
  for key, value in _extract_conn_attributes(