An OpenVPN-Based Interconnection in Multi-Clouds with Windows and Linux nodes

Real-Time Online Interactive Applications (ROIA) include use cases like product configurators, e-learning, multiplayer online gaming, and Industry 4.0 market. While core components of ROIA, e.g., interactive real-time 3D rendering, still widely run on local devices, it is very desirable to run them on a multi-cloud to benefit from better access to high-performance compute resources and prevent 'vendor lock-in‘. One challenge when running applications on a multi-cloud is to establish an efficient and secure communication between the cloud nodes that are distributed over several geographic locations and local area networks (LANs). In this paper, we propose and implement a novel OpenVPN-based node interconnection in multi-clouds. Compared to previous work, our solution is not vendor-specific and can handle multi-clouds consisting of both Windows and Linux nodes. Furthermore, it works for an arbitrary combination of private and public cloud deployments. Additionally, we implement two Python scripts to automate the process of dynamically adding new cloud deployments in an efficient manner. We describe our proof-of-concept implementation in a Kubernetes-based service deployment architecture for ROIA and report the preliminary experimental results.