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

Getting started with Docker

We have created a GitHub repository to share code examples for this book. The repository can be found at https://github.com/PacktPublishing/Docker-for-Developers. You should fork this repository, and then clone it to your host. Creating the fork means you can manage your copy of the repository as you see fit without requiring permissions. The code of interest for this section is in the chapter2/ directory. The code here implements a small Apache+PHP application that is designed to run in a container. There are sh scripts to perform the Docker command lines, so you don't have to keep typing in a long string of command-line arguments.

Before we get into the code, let's make sure that Docker is installed properly. The docker ps command prints a list of all running Docker containers. We can see we have no containers running and there is an actual docker command:

% docker ps
CONTAINER ID        IMAGE ...