Docker for Rails Developers

Creating Machines

If we’re going to deploy our application in production, we need to have somewhere to deploy it to. That means, infrastructure: machine instances capable of running code.

As we saw in Chapter 11, ​The Production Landscape​, there are a number of tools available for creating and configuring our infrastructure. However, since this is a book about Docker, we’re going to stick with Docker’s own tool—Docker Machine—for handling this.

Docker Machine is a command-line tool that can create Docker-ready instances for us. It uses the adapter pattern, providing a number of different drivers^[113] capable of creating instances on different platforms. This means we can use similar commands to create instances, whether they’re virtual instances ...