environments/major-upgrade-pacemaker-init.yaml hardcodes the OSP 8 repo names.  Ideally, it should probably be getting them from an environment file, but even worse is the fact that it gets them wrong:

grep -n rhel-7-server-openstack-8.0-rpms environments/major-upgrade-pacemaker-init.yaml
7:      subscription-manager repos --enable=rhel-7-server-openstack-8.0-rpms --enable=rhel-7-server-openstack-8.0-director-rpms

The repo names have been changed is OSP 8 to use "openstack-8" instead of "openstack-8.0".  So the command should be:

  subscription-manager repos --enable=rhel-7-server-openstack-8-rpms --enable=rhel-7-server-openstack-8-director-rpms

This causes the "openstack overcloud deploy ... major-upgrade-pacemaker-init.yaml" command to fail for anyone using the customer portal (and I believe Satellite 6).