KubeCon + CloudNativeCon North America 2024

In the world of Kubernetes, optimizing scheduler performance is key to maximizing cluster efficiency. This session dives into building custom Kubernetes scheduler plugins using WebAssembly and leveraging KWOK to test their performance. We'll begin by introducing the fundamentals of Kubernetes scheduling and the unique advantages of WebAssembly, such as fast startup times and secure sandboxing. We will show how the kube-scheduler-wasm-extension project can be used to create custom scheduling logic easily. Next, we'll explore KWOK (Kubernetes WithOut Kubelet), a tool that simulates Kubernetes clusters for testing and benchmarking purposes. Through hands-on examples, we'll demonstrate how to set up KWOK, create realistic test environments, and gather performance metrics to fine-tune your custom scheduler plugins.