The login_gssapi code paths do not support keytabs, as that had been an open TODO. This is now implemented in PR #708.
(Opening a ticket for tracking purposes.)
pr #708 has been merged
Metadata Update from @mikem: - Issue close_status updated to: Fixed - Issue set to the milestone: 1.15 - Issue status updated to: Closed (was: Open)
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/739
Please continue any further discussion there.