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

Introducing Docker Swarm

Before we go any further, I should mention that there are two very different versions of Docker Swarm. There was a standalone version of Docker Swarm—this was supported up until Docker 1.12 and is no longer being actively developed; however, you may find some old documentation mentions it. Installation of the standalone Docker Swarm is not recommended as Docker ended support for version 1.11.x in the first quarter of 2017.

Docker version 1.12 introduced Docker Swarm mode. This introduced all of the functionality that was available in the standalone Docker Swarm version into the core Docker Engine, along with a significant number of additional features. As we are covering Docker 19.03 and higher in this book, we will be using Docker Swarm mode, which, for the remainder of the chapter, we will refer to as Docker Swarm.

As you are already running a version of Docker with in-built support for Docker Swarm, there isn't anything you need to do in...