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 9: Cloud-Native Continuous Deployment Using Spinnaker

Deploying Docker containers as cloud-native applications to Kubernetes poses challenges that a specialized container-centric continuous deployment system can solve. Instead of writing custom deployment logic in those scripts that Jenkins runs, as we did when we deployed to a single host, we can use Spinnaker to deploy to Kubernetes. Because Spinnaker works with Jenkins, we can continue to use the Jenkins server that we already set up to build the Docker containers and prepare the Helm Charts for deployment. Using Spinnaker, we will deploy an application using its built-in support for Helm Charts and Kubernetes deployments. We will also explore some of Spinnaker's specialized deployment strategies and see how they apply to Kubernetes-centric environments.

In this chapter, we are going to learn when and why you would use Spinnaker in addition to Jenkins. We will learn how to improve your setup for supporting the deployment...