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

Surveying Spinnaker's deployment and testing features

In the introduction to Spinnaker earlier in this chapter, we noted that you would have the opportunity to learn more about the various deployment methodologies available to you. Let's now dig into these concepts, including canary and red/black deployments, and describe their relevance to Spinnaker when used to manage Kubernetes deployments.

Canary deployments

Canary deployment is a method of exposing an application to its users where you run a subset of the traffic for the application through a new deployment while keeping most of the traffic for the application going to the currently deployed version. This can help you test whether the new version is suitable for production use without immediately funneling all the traffic through.

The Kubernetes v2 Spinnaker provider does not support canary deployments

Although this is one of Spinnaker's most desired features, the Kubernetes v2 cloud provider does not...