Journey into the amazing world of WebAssembly (Wasm) and learn about how it can be applied on
the cloud. This book is an introduction to Wasm aimed at professionals accustomed to working
with cloud-related technologies such as Kubernetes and Istio service mesh.Author Shashank Jain
begins with an introduction to Wasm and its related tooling such as wasm-bindgen and wapc. He
then walks you through code examples using Rust Golang and JavaScript to demonstrate how they
can be compiled to Wasm and consumed from Wasm runtimes deployed standalone as well as on the
cloud. You will see how a wasm module can be run through an http interface and how Wasm fits
into CNCF projects such as Kubernetes and Istio service mesh. After that you'll learn how the
polyglot nature of WebAssembly can be leveraged through examples written in languages like Rust
and consumed via Golang and JavaScript with a focus on how WebAssembly allows interoperability
between them. You'll gain an understanding of how Wasm-based modules can be deployed inside
Linux containers and orchestrated via Kubernetes and how Wasm can be used within the Istio
proxy to apply rules and filters. After reading this book you'll have the knowledge necessary
to apply WebAssembly to create multi tenanted workloads which can be polyglot in nature and can
be deployed on cloud environments like Kubernetes. What You Will Learn Understand how Wasm can
be used for server-side applications Learn about Wasm memory model and Wasm module layout How
communication between host and Wasm module is facilitated The basics of Wasm sandboxing and
security The fundamentals of tooling around Wasm such as WAT and Wasm-pack Create a Wasm
module in Rust and consume it from JavaScript Rust and Golang. Grasp how Kubernetes can be
used to orchestrate Wasm-based workloads How Wasm fits into service mesh Who Is This Book For
Software developers architects who are looking to hone their skills in virtualization and
explore alternatives to Docker and container-based technologies for their workload deployments.
Readers should have a basic programming background in languages such as Rust and Golang to get
the most out of this book.
