Please, if you are adding new images to fedorainfracloud.org then add those images to playbook too:

https://infrastructure.fedoraproject.org/cgit/ansible.git/tree/playbooks/hos...

It is not needed for special playbooks (e.g. copr-builders) but it should be done for common images (i.e., Fedora-Cloud-Base-27-1.6.x86_64.qcow2)

Miroslav Suchý