Docker for Rails Developers

Chapter 5Beyond the App: Adding Redis

OK, fess up. Did you look at the title of this chapter and think “Redis?! What about setting up the database?!” If so, I promise I’m not crazy: there’s a very good reason for tackling Redis first, as you’ll discover shortly.

First, let’s review what we’ve achieved. We’ve already learned how to:

• Use Docker to generate a fresh Rails project without Ruby installed
• Start the Ruby server to run our application
• Ensure our gems are installed and up to date
• Create our very own Docker image suited to running our Rails app
• Use Docker Compose to manage the whole process

That’s not a bad start, but currently it isn’t enough to build anything other than the most basic of websites or apps. We’re missing a key piece of the ...