Technology · Ebook

wasmCloud: Distributed Apps with WebAssembly

by Shriira Press

wasmCloud is the CNCF platform for building distributed applications with WebAssembly components — you write portable Wasm components (business logic) decoupled from infrastructure, and wasmCloud connects them to capability providers (HTTP, messaging, storage) at runtime, running the same components anywhere across a distributed lattice. This free book teaches it from the ground up: the distributed application problem and what wasmCloud is, WebAssembly and the Component Model concepts, wasmCloud's architecture (hosts, the lattice, components, providers), components (portable business logic), capabilities and providers (pluggable infrastructure), interfaces and WIT (the contracts), the lattice (the distributed mesh), linking and runtime wiring (late binding), deploying and operating (wadm, declarative apps), and using wasmCloud in practice. Ten focused chapters with clear diagrams that make WebAssembly-based distributed computing concrete — write logic once, run it anywhere (cloud to edge), swap infrastructure freely via abstract capabilities, and compose distributed apps from portable components wired to providers at runtime — secure, decoupled, and standards-based.

Contents

1. 1Preface
2. 2Chapter 1 — What wasmCloud Is
3. 3Chapter 2 — WebAssembly and the Component Model
4. 4Chapter 3 — wasmCloud Architecture
5. 5Chapter 4 — Components
6. 6Chapter 5 — Capabilities and Providers
7. 7Chapter 6 — Interfaces and WIT
8. 8Chapter 7 — The Lattice
9. 9Chapter 8 — Linking and Runtime Wiring
10. 10Chapter 9 — Deploying and Operating
11. 11Chapter 10 — wasmCloud in Practice