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)

Our first Docker Compose application

As already mentioned, Docker Compose uses a YAML file, typically named dockercompose.yml, to define what your multi-container application should look like. The Docker Compose representation of the two-container application we launched in Chapter 4, Managing Containers, is as follows:

version: "3"

image: redis:alpine
- redis_data:/data
restart: always
- redis
image: russmckendrick/moby-counter
- "8080:80"
restart: always


Even without working through each of the lines in the file, it should be quite straightforward to follow along with what is going on. To launch our application, we simply change to the folder that contains your docker-compose.yml file and run the following:

$ docker-compose up...