Webassembly for cloud : a basic guide for Wasm-based cloud apps / Shashank Mohan Jain.

Format:

Book

Author/Creator:

Jain, Shashank, author.

Language:

English

Subjects (All):

Application software--Development.

Application software.

Web site development.

Cloud computing.

Physical Description:

1 online resource (170 pages)

Place of Publication:

New York, New York : Apress Media LLC, [2022]

Summary:

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, youll 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. Youll 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, youll 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. You will: Understand how Wasm can be used for server-side applications Learn about Wasm memory model and Wasm module layout Learn how communication between host and Wasm module is facilitated Understand the basics of Wasm sandboxing and security Learn 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 See how Wasm fits into service mesh.

Contents:

Intro

Table of Contents

About the Author

About the Technical Reviewer

Acknowledgments

Introduction

Chapter 1: WebAssembly Introduction

Wasm in the Cloud

WebAssembly Use Cases

WebAssembly Architecture

Stack-Based Virtual Machine

Summary

Chapter 2: WebAssembly Module Internals: Sections and Memory Model

Type Section

Function Section

Code Section

Export Section

Import Section

Table Section

Memory Section

Data Section

Custom Section

Start Section

Global Section

Programmatically Parsing a Wasm File

Chapter 3: WebAssembly Text Toolkit and Other Utilities

The wat2wasm Utility

Tables

The wasm2wat Utility

Object Dump Using wasm-objdump

Chapter 4: WebAssembly with Rust and JavaScript: An Introduction to wasm-bindgen

wasm-bindgen

Prerequisites

Complex Types via wasm-bindgen

The Bloom Filter

How a Bloom Filter Works

The Cuckoo Filter

Chapter 5: waPC

waPC Architecture

Handling a Complex Type

Rust Host for waPC-based Bindings

Chapter 6: Wasm Web Interface

Node Example

Chapter 7: Wasm and Kubernetes

Docker

Kubernetes

The Workings of Kubernetes

Packaging a Rust Web App into a Docker Container

Pushing an Image to a Docker Registry

The Pod Yaml File

The Service Yaml File

A Golang-based Web App Deployed on Kubernetes

Kubernetes Deployment of the Golang Web App

Chapter 8: Extending Istio with WebAssembly

What Is Envoy?

Rust-based Wasm Filter

Deployment Steps

Envoy Setup

Launch Envoy

Index.

Notes:

Description based on print version record.

Includes index.

Other Format:

Print version: Jain, Shashank Mohan WebAssembly for Cloud

ISBN:

9781484274965

1484274962

OCLC:

1286428282