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

Introduction

We have seen that we package our applications as containers and deploy them as a Pod in Kubernetes, which is the minimal unit of Deployment. With the help of the advanced scheduling capabilities provided by Kubernetes, we can optimize the deployment of these Pods with respect to our hardware infrastructure to meet our needs and get the most out of the available resources.

Kubernetes clusters generally have more than a few nodes (or machines or hosts) where the Pod can be executed. Consider that you are managing a few of the machines and you have been assigned to execute an application on these machines. What would you do to decide which machine is the best fit for the given application? Until now in this workshop, whenever you wanted to run a Pod on a Kubernetes cluster, have you mentioned which node(s) the Pod should run on?

That's right – we don't need to; Kubernetes comes with a smart component that finds the best node to run your Pod. This component...