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

Kubernetes and other Docker tools

When we enabled Kubernetes, we selected the Deploy Docker Stacks to Kubernetes by default option. If you recall, in Chapter 8, Docker Swarm, we used the docker stack command to launch our Docker Compose files in Docker Swarm and, as you might have guessed, running those same commands will now launch our stack in our Kubernetes cluster.

The Docker Compose file we used looked like the following:

version: '3'
services:
  cluster:
    image: russmckendrick/cluster
    ports:
      - '80:80' deploy:
    replicas: 6
    restart_policy:
      condition: on-failure
    placement:
      constraints:
        - node.role == worker

Before we launch the application on Kubernetes, we need to make a...