Try to use a 301 redirect to download directly from s3. Allow the s3 and userfiles to run without internet access.

storage/basestorage.py

@@ -65,6 +65,9 @@ class Storage(object):
     return '{0}/{1}/{2}/{3}/diffs.json'.format(self.images, namespace,
                                                repository, image_id)
 
+  def get_direct_download_url(self, path, expires_in=60):
+    return None
+
   def get_content(self, path):
     raise NotImplementedError