KubeCon + CloudNativeCon North America 2024

Multi-tenancy in Kubernetes involves the coexistence of multiple users or teams (tenants) on a single Kubernetes cluster while ensuring isolation, security, and performance. Our use cases at Uber span from scenarios with disruptive neighbors to those with large container sizes, specialized hardware, sticky placement preferences, and dynamic resource scaling demands, necessitating robust isolation measures. In this proposal, we present a comprehensive exploration of multi-tenancy in Kubernetes, covering strategies, the challenges we have faced and the effective solutions implemented to overcome them at Uber. Further, we will deep dive into the key aspects of building and managing multi-tenant Kubernetes clusters, by establishing strong tenant boundaries leveraging the ideas around node pools and tightly integrating with namespaces.