Dont override auth_url unless necessary. Fixes Rackspace driver
@@ -153,6 +153,7 @@ class OpenStackBaseConnection(ConnectionUserAndKey):
user_id, key, secure=secure, timeout=timeout,
retry_delay=retry_delay, backoff=backoff, proxy_url=proxy_url)
+ if ex_auth_url:
self.auth_url = ex_auth_url
if ex_force_auth_version:
self._auth_version = ex_force_auth_version
