Running WebAssembly on Kubernetes with Wasm Shims

Modern cloud-native engineering is shifting toward faster startup times and smaller footprints. WebAssembly (Wasm) offers a lightweight alternative to traditional containers, but running these micro-runtimes inside orchestration platforms requires specialized integration. This course provides a clear, text-based path to understanding how Wasm modules run directly on your clusters. You will start with the core concepts of WebAssembly System Interface (WASI), explore how containerd manages non-container workloads, and learn to configure your nodes to support both technologies side-by-side. What you'll learn: Understand the foundational architecture of WebAssembly and WASI in cloud environments; Configure containerd to run Wasm workloads using specialized runtime shims; Declare and manage Kubernetes RuntimeClass resources for workload routing; Apply node labels, taints, and tolerations to schedule Wasm applications; Deploy and scale multi-architecture workloads on a single unified cluster; Implement modern observability and debugging patterns for Wasm microservices. The course begins with essential terminology, outlining the differences between virtual machines, containers, and WebAssembly runtimes. From there, you will progress through configuring cluster nodes, writing deployment manifests, and managing traffic to your Wasm applications. This course is designed for DevOps engineers, system administrators, and backend developers who have a basic familiarity with Kubernetes and want to adopt modern, high-performance runtime technologies. Start reading today to build faster, more efficient cloud-native infrastructure.