Hi, Some random notes on using aws4 signatures with boto S3 client. .boto: [Boto] debug = 2 [s3] use-sigv4 = True With use-sigv4 enabled, I had issues with boto--what error you see may depend on the method used to create an S3Connection--use connect_s3 in my tests, and found I was able to run if I added an initializer for the class member self.region_name to the S#HmacAuthV4Handler ctor: class S3HmacAuthV4Handler(HmacAuthV4Handler, AuthHandler): """ Implements a variant of Version 4 HMAC authorization specific to S3. """ capability = ['hmac-v4-s3'] def __init__(self, *args, **kwargs): super(S3HmacAuthV4Handler, self).__init__(*args, **kwargs) self.region_name = "" This was against a pip-installed boto. Matt -- Matt Benjamin Red Hat, Inc. 315 West Huron Street, Suite 140A Ann Arbor, Michigan 48103 http://www.redhat.com/en/technologies/storage tel. 734-707-0660 fax. 734-769-8938 cel. 734-216-5309 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html