Comment 3 for bug 1625227

> 2016-12-06T02:51:05.316334+00:00 debug: 2016-12-06 02:51:05.274612 7f3f5614da00 0 librados: client.radosgw.gateway authentication error (1) Operation not permitted

Please check if the keyring (/etc/ceph/ceph.client.radosgw.gateway) is available and has correct permission (the pseudouser running radosgw should be able to read it)