Suite d'article sur le pattern role profile
http://garylarizza.com/blog/2014/02/17/puppet-workflow-part-2/
http://garylarizza.com/blog/2014/02/18/puppet-workflow-part-3/
http://garylarizza.com/blog/2014/03/07/puppet-workflow-part-3b/
http://garylarizza.com/blog/2014/10/24/puppet-workflows-4-using-hiera-in-anger/