To have correctly loaded installer for old Ubuntus we have change in file /usr/share/foreman/app/models/operatingsystems/debian.rb
- ‘dists/$release/main/installer-$arch/current/images/netboot/’ + guess_os + ‘-installer/$arch’
- ‘dists/$release’ + ([‘trusty’, ‘xenial’].include?(release_name) ? ‘-updates’ : ‘’) + ‘/main/installer-$arch/current/images/’ + (release_name == ‘trusty’ ? ‘xenial-’ : ‘’) + ‘netboot/’ + guess_os + ‘-installer/$arch’