Test-Driven Development with Python, 3rd Edition

Chapter 9. Containerization aka Docker

A Note for Early Release Readers

With Early Release ebooks, you get books in their earliest form—the author’s raw and unedited content as they write—so you can take advantage of these technologies long before the official release of these titles.

This will be the 9th chapter of the final book. The GitHub repo is available at https://github.com/hjwp/book-example.

If you have comments about how we might improve the content and/or examples in this book, or if you notice missing material within this chapter, please reach out to the author at [e-mail].

Is all fun and game until you are need of put it in production.

Devops Borat

It’s time to deploy the first version of our site and make it public. They say that if you wait until you feel ready to ship, then you’ve waited too long.

Is our site usable? Is it better than nothing? Can we make lists on it? Yes, yes, yes.

No, you can’t log in yet. No, you can’t mark tasks as completed. But do we really need any of that stuff? Not really—​and you can never be sure what your users are actually going to do with your site once they get their hands on it. We think our users want to use the site for to-do lists, but maybe they actually want to use it to make “top 10 best fly-fishing spots” lists, for which you don’t need any kind of “mark completed” function. We won’t know until we put it out there.

Over the next couple of chapters we’re going to go through and actually deploy our site ...