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 2: Using VirtualBox and Docker Containers for Development

In the previous chapter, we introduced virtualization and containerization. In this chapter, we'll demonstrate how you can use software such as VirtualBox to create virtual machines and we'll use Docker to create containers. The focus of this chapter will be on using these technologies for development on your workstation.

A common problem among developers who work on multiple projects is that, over time, they end up with a lot of software installed on their workstations that they don't currently use. This can be so problematic that the developer might reformat their workstation's hard drive and reinstall the operating system.

Both VirtualBox and Docker containers can be used to resolve this problem. The software you install stays within either the virtual machine's or the container's filesystem and is separate from the workstation's native filesystem. If you delete a virtual machine...