Have the config setup tool automatically prepare the S3 or GCS storage with CORS config

util/config/validator.py

@@ -15,6 +15,13 @@ from util.oauth import GoogleOAuthConfig, GithubOAuthConfig
 
 SSL_FILENAMES = ['ssl.cert', 'ssl.key']
 
+def get_storage_provider(config):
+  parameters = config.get('DISTRIBUTED_STORAGE_CONFIG', {}).get('local', ['LocalStorage', {}])
+  try:
+    return get_storage_driver(parameters)
+  except TypeError:
+    raise Exception('Missing required storage configuration parameter(s)')
+
 def validate_service_for_config(service, config):
   """ Attempts to validate the configuration for the given service. """
   if not service in _VALIDATORS:
@@ -57,16 +64,18 @@ def _validate_redis(config):
 
 def _validate_registry_storage(config):
   """ Validates registry storage. """
-  parameters = config.get('DISTRIBUTED_STORAGE_CONFIG', {}).get('local', ['LocalStorage', {}])
-  try:
-    driver = get_storage_driver(parameters)
-  except TypeError:
-    raise Exception('Missing required storage configuration parameter(s)')
+  driver = get_storage_provider(config)
 
   # Put and remove a temporary file.
   driver.put_content('_verify', 'testing 123')
   driver.remove('_verify')
 
+  # Run setup on the driver if the read/write succeeded.
+  try:
+    driver.setup()
+  except Exception as ex:
+    raise Exception('Could not prepare storage: %s' % str(ex))
+
 
 def _validate_mailing(config):
   """ Validates sending email. """