Comment 1 for bug 1522857

Horizon and Keystone stop working because deployment/puppet/osnailyfacter/modular/apache/apache.pp sets purge_configs to "true", which deletes everything inside /etc/apache2/sites-{enabled,available}/. puppet-keystone (keystone::wsgi::apache) and puppet-horizon (horizon::wsgi::apache) should be notified on purge and regenerate the config files.