I can create and delete containers in 'testlabs' and 'service' but not in 'taavi-test-project' or 'cloudvirt-canary'.
Let's hope this is configurable someplace! So far all I see is rules about bucket naming, at the top of https://documentation.suse.com/en-us/ses/7.1/html/ses-all/cha-ceph-gw.html