superuser: add storage replication config

data/model/image.py

@@ -356,3 +356,19 @@ def get_image(repo, dockerfile_id):
     return Image.get(Image.docker_image_id == dockerfile_id, Image.repository == repo)
   except Image.DoesNotExist:
     return None
+
+
+def ensure_image_locations(*names):
+  with db_transaction():
+    locations = ImageStorageLocation.select().where(ImageStorageLocation.name << names)
+
+    insert_names = list(names)
+
+    for location in locations:
+      insert_names.remove(location.name)
+
+    if not insert_names:
+      return
+
+    data = [{'name': name} for name in insert_names]
+    ImageStorageLocation.insert_many(data).execute()