Book Image

Building Enterprise JavaScript Applications

By : Daniel Li
Book Image

Building Enterprise JavaScript Applications

By: Daniel Li

Overview of this book

With the over-abundance of tools in the JavaScript ecosystem, it's easy to feel lost. Build tools, package managers, loaders, bundlers, linters, compilers, transpilers, typecheckers - how do you make sense of it all? In this book, we will build a simple API and React application from scratch. We begin by setting up our development environment using Git, yarn, Babel, and ESLint. Then, we will use Express, Elasticsearch and JSON Web Tokens (JWTs) to build a stateless API service. For the front-end, we will use React, Redux, and Webpack. A central theme in the book is maintaining code quality. As such, we will enforce a Test-Driven Development (TDD) process using Selenium, Cucumber, Mocha, Sinon, and Istanbul. As we progress through the book, the focus will shift towards automation and infrastructure. You will learn to work with Continuous Integration (CI) servers like Jenkins, deploying services inside Docker containers, and run them on Kubernetes. By following this book, you would gain the skills needed to build robust, production-ready applications.
Table of Contents (26 chapters)
Title Page
Copyright and Credits
Packt Upsell
Free Chapter
The Importance of Good Code

Chapter 17. Migrating to Docker

So far, we have focused on developing the backend and frontend of our application, and have paid little attention to our infrastructure. In the next two chapters, we will focus on creating a scalable infrastructure using Docker and Kubernetes.

So far, we’ve manually configured two Virtual Private Servers (VPSs), and deployed each of our backend APIs and client applications on them. As we continue to develop our applications on our local machine, we test each commit locally, on Travis CI, and on our own Jenkins CI server. If all tests pass, we use Git to pull changes from our centralized remote repository on GitHub and restart our application. While this approach works for simple apps with a small user base, it will not hold up for enterprise software.

Therefore, we'll begin this chapter by understanding why manual deployment should be a thing of the past, and the steps we can make towards full automation of the deployment process. Specifically, by following...