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

Chapter 5, Docker Compose

Here are some sample answers to the questions presented in this chapter:

  1. YAML, or YAML Ain’t Markup Language.
  2. The restart flag is the same as the --restart flag.
  3. False; you can use Docker Compose to build images at runtime.
  4. By default, Docker Compose uses the name of the folder that the Docker Compose file is stored in.
  5. You use the -d flag to start the container’s detached mode.
  6. Using the docker-compose config command will expose any syntax errors within your Docker Compose file.
  7. The Docker App bundles your Docker Compose file into a small Docker image, which can be shared via Docker Hub or other registries, the Docker app command-line tool then can render working Docker Compose files from the data contained within the image.