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

Using Docker containers

Docker is generally used to create containers, which run your application as if in a headless virtual machine. In fact, on host operating systems that are not Linux-based, Docker effectively runs Linux in a virtual machine and runs your containers within that virtual machine. This is done transparently.

Note:

You don't have to install VirtualBox yourself. Docker is packaged in such a way that it will install or use any already-existing virtualization technology (for example, a hypervisor) for your operating system.

Introduction to containers

Earlier versions of Docker installed VirtualBox to create its virtual machine, but more recent virtualization technology implemented within the operating systems allows Docker to use those technologies instead.

Docker for Linux containers expects the host operating system or the virtual machine to be running Linux. The containers share the Linux kernel with the host. Docker can be used to run Windows...