Comment 61 for bug 1648732

Charles, the mos8.0-holdback repository is for slave nodes (Ubuntu-based), so you can find it in the environment settings (please refer to https://docs.mirantis.com/openstack/fuel/fuel-8.0/operations.html#configuring-repositories). This repo is normally present in the setting if you didn't remove it. If you used the fuel-createmirror tool to download all repositories to use them locally you will have to re-run fuel-createmirror to refresh your local copy of repos.

Also, if you already have a running environment and want to add nodes you need to delete the provisioning image of this environment from the /var/www/nailgun/targetimages directory. It will be regenerated with fixed puppet once you start adding nodes.