PuppetConf 2013

Throughout the last year, we have been using and developing tools that allow us to have an IaaS where our data center is configured by Puppet and our virtualization and authentication needs are catered by Openstack. RedHat's foreman is our lifecycle management tool which we configured to support both bare metal and Openstack virtual machines. We use git to manage environments and hostgroup configurations and we will tell you how we deal with its security implications, how to store Hieradata secrets. Switching from a homebrew toolchain to open source tools like Facter, Foreman, Openstack has turned out into many contributions to these teams. Nearly everyone at CERN has started to wear the devops hat which brings new challenges in terms of development workflows and scalability.