A report from a research project that shows that it is possible to operate a digitally sovereign cloud with the help of OpenStack and other open source components. The question is briefly explored and shown what digital sovereignty actually means - and what it does not. The focus of this short presentation is on the infrastructure, knowing full well that this is not an all-encompassing solution for digital sovereignty because other components (e.g. front ends) are missing. The project team plans and implements the construction and operation of a sovereign, private cloud that serves as an edge cloud and in which the workloads in research and teaching are processed. The project team has been operating a private cloud under OpenStack since 2016. Since container workloads are and will be increasingly in demand, the decision was made to set up an additional instance of the reference implementation of the Sovereign Cloud Stack (SCS) in parallel to the existing OpenStack installation. The workloads are then transferred from the OpenStack installation to the Sovereign Cloud Stack.
