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

Docker image security

As you have worked through the material in this book, you will have become increasingly familiar with images. These are a fundamental building block in the Docker ecosystem. An image is the combination of the filesystem and parameters that, when run by Docker, becomes your container.

Having made sure Docker itself is patched and secured, that our application code is robust, and that when we run the containers they will have limited privileges, we also want to ensure that the image itself is secure.

One of the benefits of Docker is that services such as Docker Hub allow us to share and reuse container images. However, we need to be careful that what we are downloading is secure and has not been uploaded by a malicious party:

Figure 13.1 – Docker Hub displaying example repositories

You should always be cautious, however, even with legitimate/official websites.

There have been several cases in the past where malicious...