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 Jenkins to facilitate continuous deployment

The world of continuous integration servers has come a long way in the last 20 years. One of the most popular systems is Jenkins (see https://jenkins.io/)—because it is free, flexible, and offers a huge variety of integrations and plugins. CloudBees (https://www.cloudbees.com/), the company behind it, also offers commercial support via a paid version. Your company might already be running Jenkins, in which case you may not need to do much setup to get your project to build and run.

We are going to use the Jenkins 2.x Pipeline project type, where a Jenkinsfile is committed to source control in GitHub and controls the steps Jenkins uses to build and deploy the project.

Avoid these traps

Before we set up Jenkins, we should make sure we avoid certain common traps people fall into when setting it up for the first time.

Avoid running Jenkins in Docker

Although you can use Docker to run a Jenkins server, doing so introduces...