Docker for Rails Developers

Chapter 2Running a Rails App in a Container

By now you should be starting to become familiar with the concepts of Docker, like images, and running containers based on those images. Don’t worry if you don’t remember all the commands and various options. The most important thing is that you’re beginning to understand the high-level concepts—all the rest will follow as you start to use Docker more and more.

In the last chapter, we created our shiny new Rails app. After the amazement began to wear off at how cool it was to generate an app with Ruby supplied by Docker, you were probably left pondering an important question: how the heck do I actually run it?

In this chapter, we’re going to pick up where we left off to get our new app up and running. ...