Add ability for specific geographic regions to be blocked from pulling images within a namespace

data/registry_model/interface.py

@@ -316,3 +316,9 @@ class RegistryDataInterface(object):
     """ Creates a manifest under the repository and sets a temporary tag to point to it.
         Returns the manifest object created or None on error.
     """
+
+  @abstractmethod
+  def get_cached_namespace_region_blacklist(self, model_cache, namespace_name):
+    """ Returns a cached set of ISO country codes blacklisted for pulls for the namespace
+        or None if the list could not be loaded.
+    """