Docker for Rails Developers

Chapter 1A Brave New World

In this chapter, we’re going to make sure that you’re set up with a working version of Docker on your machine. This is important so you can actually try it out for yourself and follow along with the examples.

Next, we’ll dive straight in and execute our first ever Docker command—running a basic Ruby script. However, rather than relying on a version of Ruby installed on your local machine, we’ll be using one supplied by Docker.

You’ll learn the fundamentals of how Docker works, including what images and containers are and why we need them. We’ll cover the basic anatomy of docker run—probably the most central command to understanding Docker.

We’ll also begin our journey of incorporating Docker into our development workflow ...