cinder::cron::db_purge::user: {get_param: CinderCronDbPurgeUser}
cinder::cron::db_purge::age: {get_param: CinderCronDbPurgeAge}
cinder::cron::db_purge::destination: {get_param: CinderCronDbPurgeDestination}
+ cinder::glance::glance_api_servers: {get_param: [EndpointMap, GlanceInternal, uri]}