Book Image

The Kubernetes Workshop

By : Zachary Arnold, Sahil Dua, Wei Huang, Faisal Masood, Mélony Qin, Mohammed Abu Taleb
Book Image

The Kubernetes Workshop

By: Zachary Arnold, Sahil Dua, Wei Huang, Faisal Masood, Mélony Qin, Mohammed Abu Taleb

Overview of this book

Thanks to its extensive support for managing hundreds of containers that run cloud-native applications, Kubernetes is the most popular open source container orchestration platform that makes cluster management easy. This workshop adopts a practical approach to get you acquainted with the Kubernetes environment and its applications. Starting with an introduction to the fundamentals of Kubernetes, you’ll install and set up your Kubernetes environment. You’ll understand how to write YAML files and deploy your first simple web application container using Pod. You’ll then assign human-friendly names to Pods, explore various Kubernetes entities and functions, and discover when to use them. As you work through the chapters, this Kubernetes book will show you how you can make full-scale use of Kubernetes by applying a variety of techniques for designing components and deploying clusters. You’ll also get to grips with security policies for limiting access to certain functions inside the cluster. Toward the end of the book, you’ll get a rundown of Kubernetes advanced features for building your own controller and upgrading to a Kubernetes cluster without downtime. By the end of this workshop, you’ll be able to manage containers and run cloud-based applications efficiently using Kubernetes.
Table of Contents (20 chapters)
Preface

API Versions

In the Kubernetes API, there is the concept of API versioning; that is, the Kubernetes API supports multiple versions of a type of resource. These different versions may act differently. Each one has a different API path, such as /api/v1 or /apis/extensions/v1beta1.

The different API versions differ in terms of stability and support:

  • Alpha: This version is indicated by alpha in the apiVersion field—for example, /apis/batch/v1alpha1. The alpha version of resources is disabled by default as it is not intended for production clusters but can be used by early adopters and developers who are willing to provide feedback and suggestions and report bugs. Also, support for alpha resources may be dropped without notice by the time the final stable version of Kubernetes is finalized.
  • Beta: This version is indicated by beta in the apiVersion field—for example, /apis/certificates.k8s.io/v1beta1. The beta version of resources is enabled by default, and the...