Has Facebook ever been public about the tools they use for deploying new machines onto bare metal with Chef? My company faces similar problems, albeit at a much

Has Facebook ever been public about the tools they use for deploying new machines onto bare metal with Chef? My company faces similar problems, albeit at a much smaller scale, but still...I'm wondering what they have in place of a tool such as http://theforeman.org http://theforeman.org (which is very coupled to Puppet).