KubeVirt’s sig-scale publishes the project’s scale and performance data after every release and now we want to share some new data and techniques: using simulation with KWOK. In this talk, we’ll explore how Kubevirt leverages KWOK (Kubernetes Without Kubelet) to simulate thousands of Nodes and VirtualMachineInstances (VMIs). We’ll demonstrate how this large-scale simulated environment enables stress testing of the Kubevirt control plane. Furthermore, we will share how kubevirt sig-scale evaluates the control plane behavior under extreme scale to help uncover scalability limits and performance bottlenecks as well as benefits of leveraging other simulation techniques like the virtual kubelet.

This session also covers simulated load generation, collection and aggregation of performance metrics, and visualization of data trends across releases to detect scalability and performance regressions.

Kubevirt Summit Live at KubeCon + CloudNativeCon Europe 2026