+ @staticmethod
+ def is_volume_keeping_required(virtual_storage_desc: Dict[str, Any]) -> bool:
+ """Function to decide keeping persistent volume
+ upon VDU deletion.
+
+ Args:
+ virtual_storage_desc (Dict[str, Any]): virtual storage description dictionary
+
+ Returns:
+ bool (True/False)
+ """
+
+ if not virtual_storage_desc.get("vdu-storage-requirements"):
+ return False
+ for item in virtual_storage_desc.get("vdu-storage-requirements", {}):
+ if item.get("key") == "keep-volume" and item.get("value").lower() == "true":
+ return True
+ return False
+
+ @staticmethod
+ def is_shared_volume(
+ virtual_storage_desc: Dict[str, Any], vnfd_id: str
+ ) -> (str, bool):
+ """Function to decide if the volume type is multi attached or not .
+
+ Args:
+ virtual_storage_desc (Dict[str, Any]): virtual storage description dictionary
+ vnfd_id (str): vnfd id
+
+ Returns:
+ bool (True/False)
+ name (str) New name if it is a multiattach disk
+ """
+
+ if vdu_storage_requirements := virtual_storage_desc.get(
+ "vdu-storage-requirements", {}
+ ):
+ for item in vdu_storage_requirements:
+ if (
+ item.get("key") == "multiattach"
+ and item.get("value").lower() == "true"
+ ):
+ name = f"shared-{virtual_storage_desc['id']}-{vnfd_id}"
+ return name, True
+ return virtual_storage_desc["id"], False
+