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

Summary

In this chapter, we have learned about how VirtualBox can be used to create virtual machines on your workstation and how you can use it to run Windows (or Linux or other operating systems) in a virtual machine. We also learned enough about Docker to use it to build our first application.

This chapter was written using Windows 10 running within a VirtualBox virtual machine, running on an Arch Linux host. Microsoft Word was used within Windows, while the Docker commands and scripts were run and edited on the Arch Linux host.

We demonstrated how we can build a LAMP-style application, without MySQL, and containerize it. We can mount our source code directory from the host to the container so that we can edit files and see the changes immediately in the container. We learned how to persist data, meaning that stopping and starting the container would retain important files and state.

In the next chapter, we'll explore Docker Hub and build a more complex application...