Book Image

Mastering Docker - Third Edition

By : Russ McKendrick, Scott Gallagher
Book Image

Mastering Docker - Third Edition

By: Russ McKendrick, Scott Gallagher

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 an impact on the world of web development. But how can you make sure you're keeping up with the innovations it's driving, or be sure you're using it to its full potential? Mastering Docker shows you how; this book not only demonstrates how to use Docker more effectively, but also helps you rethink and reimagine what's possible with it. You will cover concepts such as building, managing, and storing images, along with best practices to make you confident, before delving more into Docker security. You'll find everything related to extending and integrating Docker in new and innovative ways. Docker Compose, Docker Swarm, and Kubernetes will help you take control of your containers in an efficient manner. By the end of the book, you will 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 (17 chapters)

Docker Compose YAML file

Before we look at using Docker Compose more, we should have a deeper dive into docker-compose.yml files as these are the heart of Docker Compose.

YAML is a recursive acronym that stands for YAML Ain't Markup Language. It is used by a lot of different applications for both configuration and also for defining data in a human-readable structured data format. The indentation you see in the examples is very important as it helps to define the structure of the data.

Moby counter application

The docker-compose.yml file we used to launch our multi-container application is split into three separate sections.

The first section simply specifies which version of the Docker Compose definition language we are...