Multi-Cluster Orchestration of 5G Experimental Deployments in Kubernetes over High-Speed Fabric

Network Functions Virtualization has been a key enabler for the wide adoption of cloud-native functions for workloads. Well-established orchestration frameworks, such as Kubernetes, optimize network operation to meet the networking requirements of deployed workloads, while providing a flexible API for fine-grained control throughout the lifecycle of the workload. As a result, these tools can be used effectively to provide access to distributed 5G experimental facilities, even across continents. However, resource clusters may belong to distinct administrative authorities; therefore, cluster integration must occur by exposing only the necessary information and services. In this paper, we suggest employing SUSE Rancher for managing multi-cluster Kubernetes deployments and utilize the Submariner framework in order to securely export services and establish connectivity across clusters. We evaluate the efficacy of such integrated framework and its various configurations over a high-speed networking fabric (up to 25 Gbps) connecting the various clusters and enabling 5G and beyond exnerimentation.