Book Image

Mastering Docker, Fourth Edition - Fourth Edition

Book Image

Mastering Docker, Fourth Edition - Fourth Edition

Overview of this book

Docker has been a game changer when it comes to how modern applications are deployed and created. It has now grown into a key driver of innovation beyond system administration, with a significant impact on the world of web development. Mastering Docker shows you how you can ensure that you're keeping up with the innovations it's driving and be sure you're using it to its full potential. This fourth edition not only demonstrates how to use Docker more effectively but also helps you rethink and reimagine what you can achieve with it. You'll start by building, managing, and storing images along with exploring best practices for working with Docker confidently. Once you've got to grips with Docker security, the book covers essential concepts for extending and integrating Docker in new and innovative ways. You'll also learn how to take control of your containers efficiently using Docker Compose, Docker Swarm, and Kubernetes. By the end of this Docker book, you’ll have a broad yet detailed sense of what's possible with Docker and how seamlessly it fits in with a range of other platforms and tools.
Table of Contents (22 chapters)
1
Section 1: Getting Up and Running with Docker
8
Section 2: Clusters and Clouds
16
Section 3: Best Practices

Building Docker images

In this section, we will cover the docker image build command. This is where the rubber meets the road, as they say. It’s time for us to build the base upon which we will start building our future images. We will be looking at different ways to accomplish this goal. Consider this as a template that you may have created earlier with virtual machines. This will help save you time as this will complete the hard work for you; you will just have to create the application that needs to be added to the new images.

There are a lot of switches that you can use while using the docker build command. So, let’s use the one that is always handy. Here, we will use the --help switch on the docker image build command to view what we can do:

$ docker image build --help

There are a lot of different flags listed that you can pass when building your image. Now, it may seem like a lot to digest, but out of all these options, we only need to use --tag, or its...