Book Image

Docker for Developers

By : Richard Bullington-McGuire, Andrew K. Dennis, Michael Schwartz
2 (1)
Book Image

Docker for Developers

2 (1)
By: Richard Bullington-McGuire, Andrew K. Dennis, Michael Schwartz

Overview of this book

Docker is the de facto standard for containerizing apps, and with an increasing number of software projects migrating to containers, it is crucial for engineers and DevOps teams to understand how to build, deploy, and secure Docker environments effectively. Docker for Developers will help you understand Docker containers from scratch while taking you through best practices and showing you how to address security concerns. Starting with an introduction to Docker, you’ll learn how to use containers and VirtualBox for development. You’ll explore how containers work and develop projects within them after you’ve explored different ways to deploy and run containers. The book will also show you how to use Docker containers in production in both single-host set-ups and in clusters and deploy them using Jenkins, Kubernetes, and Spinnaker. As you advance, you’ll get to grips with monitoring, securing, and scaling Docker using tools such as Prometheus and Grafana. Later, you’ll be able to deploy Docker containers to a variety of environments, including the cloud-native Amazon Elastic Kubernetes Service (Amazon EKS), before finally delving into Docker security concepts and best practices. By the end of the Docker book, you’ll be able to not only work in a container-driven environment confidently but also use Docker for both new and existing projects.
Table of Contents (21 chapters)
1
Section 1: An Introduction to Docker – Containers and Local Development
6
Section 2: Running Docker in Production
14
Section 3: Docker Security – Securing Your Containers

Chapter 3: Sharing Containers Using Docker Hub

In the previous chapter, we learned how to build a container and run it on our workstation using Docker. We used a Debian image as our starting point, but where did that image come from? The answer is that it came from Docker Hub. Docker Hub is the official container image library for Docker, run by the same folk who brought us Docker itself.

The container library contains the official images for numerous programs, servers, services, and so on that you might install within your own containers. For example, there are official images for various Linux distributions, versions of Node.js, versions of MySQL and MongoDB, and so on.

You can think of Docker Hub as being like GitHub. You can explore existing organizations and pre-made containers, as well as upload your own containers and create your own organizations.

We will demonstrate how to use the Docker Hub website to search and get information for third-party containers that you...