Book Image

The Kubernetes Workshop

By : Zachary Arnold, Sahil Dua, Wei Huang, Faisal Masood, Mélony Qin, Mohammed Abu Taleb
5 (1)
Book Image

The Kubernetes Workshop

5 (1)
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

Helm

In this section, we are going to be taking a look at a tool that is very helpful in the Kubernetes ecosystem called Helm. Helm was created by Microsoft after it quickly became apparent that for any sizeable deployment of Kubernetes (for example, those involving 20 or more separate components, observability tools, services, and other objects), there are a lot of YAML manifests to keep track of. Couple that with the fact that many companies run multiple environments other than production, which you need to be able to keep in sync with each other, and you start to have an unwieldy problem on your hands.

Helm allows you to write Kubernetes manifest templates, to which you supply arguments that override any defaults, and then Helm creates the appropriate Kubernetes manifests for you. Thus, you can use Helm as a sort of package manager, where your entire application can be deployed using a Helm chart, and you can tweak a few small parameters before installing. Another way to use...