Book Image

Mastering Kubernetes - Fourth Edition

By : Gigi Sayfan
3.3 (3)
Book Image

Mastering Kubernetes - Fourth Edition

3.3 (3)
By: Gigi Sayfan

Overview of this book

The fourth edition of the bestseller Mastering Kubernetes includes the most recent tools and code to enable you to learn the latest features of Kubernetes 1.25. This book contains a thorough exploration of complex concepts and best practices to help you master the skills of designing and deploying large-scale distributed systems on Kubernetes clusters. You’ll learn how to run complex stateless and stateful microservices on Kubernetes, including advanced features such as horizontal pod autoscaling, rolling updates, resource quotas, and persistent storage backends. In addition, you’ll understand how to utilize serverless computing and service meshes. Further, two new chapters have been added. “Governing Kubernetes” covers the problem of policy management, how admission control addresses it, and how policy engines provide a powerful governance solution. “Running Kubernetes in Production” shows you what it takes to run Kubernetes at scale across multiple cloud providers, multiple geographical regions, and multiple clusters, and it also explains how to handle topics such as upgrades, capacity planning, dealing with cloud provider limits/quotas, and cost management. By the end of this Kubernetes book, you’ll have a strong understanding of, and hands-on experience with, a wide range of Kubernetes capabilities.
Table of Contents (21 chapters)
19
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Index

Extending the Kubernetes API

Kubernetes is an extremely flexible platform. It was designed from the get-go for extensibility and as it evolved, more parts of Kubernetes were opened up, exposed through robust interfaces, and could be replaced by alternative implementations. I would venture to say that the exponential adoption of Kubernetes across the board by start-ups, large companies, infrastructure providers, and cloud providers is a direct result of Kubernetes providing a lot of capabilities out of the box, but allowing easy integration with other actors. In this section, we will cover many of the available extension points, such as:

  • User-defined types (custom resources)
  • API access extensions
  • Infrastructure extensions
  • Operators
  • Scheduler extensions

Let’s understand the various ways you can extend Kubernetes.

Understanding Kubernetes extension points and patterns

Kubernetes is made of multiple components: the API server...