Docker for Rails Developers

Appendix 2Finding Images to Use

Throughout the book, we use a number of different known images. You may be wondering how you’d find images to use if you had to do this yourself. By the time you finish this book, it’s important for you to be self-sufficient and able to figure things out for yourself, so let’s delve into this now.

Imagine we want to run a Postgres database, and we need to find an image that provides it. There are two ways you can go about finding images: using Docker Hub—Docker’s online service for storing images—or Docker’s command-line interface (CLI.) Let’s look at both in turn.