NETWAYS is using OpenNebula in their multi-customer cloud for years now. Having the roots in a typical XEN replacement, more and more cloud functionalities are used in production now. The system is heavily coupled with Puppet and all other internal systems like monitoring, backup and accounting. The talk will focus on the hurdles taken in the last years starting with various design considerations and different steps made to achieve the “final” architecture NETWAYS is using today. It’ will also give a detailed view onthe current setup and connected subsystems.