Book Image

Node.js Web Development - Fifth Edition

By : David Herron
Book Image

Node.js Web Development - Fifth Edition

By: David Herron

Overview of this book

Node.js is the leading choice of server-side web development platform, enabling developers to use the same tools and paradigms for both server-side and client-side software. This updated fifth edition of Node.js Web Development focuses on the new features of Node.js 14, Express 4.x, and ECMAScript, taking you through modern concepts, techniques, and best practices for using Node.js. The book starts by helping you get to grips with the concepts of building server-side web apps with Node.js. You’ll learn how to develop a complete Node.js web app, with a backend database tier to help you explore several databases. You'll deploy the app to real web servers, including a cloud hosting platform built on AWS EC2 using Terraform and Docker Swarm, while integrating other tools such as Redis and NGINX. As you advance, you'll learn about unit and functional testing, along with deploying test infrastructure using Docker. Finally, you'll discover how to harden Node.js app security, use Let's Encrypt to provision the HTTPS service, and implement several forms of app security with the help of expert practices. With each chapter, the book will help you put your knowledge into practice throughout the entire life cycle of developing a web app. By the end of this Node.js book, you’ll have gained practical Node.js web development knowledge and be able to build and deploy your own apps on a public web hosting solution.
Table of Contents (19 chapters)
1
Section 1: Introduction to Node.js
6
Section 2: Developing the Express Application
12
Section 3: Deployment

Setting up PM2 to manage Node.js processes

We have two servers, svc-notes and svc-userauth, configured so we can run the two services making up the Notes application stack. A big task remaining is to ensure the Node.js processes are properly installed as background processes.

To see the problem, start another command window and run these commands:

$ multipass restart svc-userauth
$ multipass restart svc-notes

The server instances were running under Multipass, and the restart command caused the named instance to stop and then start. This emulates a server reboot. Since both were running in the foreground, you'll see each command window exit to the host command shell, and running multipass list again will show both instances in the Running state. The big takeaway is that both services are no longer running.

There are many ways to manage server processes, to ensure restarts if the process crashes, and so on. We'll use PM2 (http://pm2.keymetrics.io/) because it's optimized for...