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

Introduction

In the previous chapters, you learned about application containerization, how Kubernetes works, and some of the "proper nouns" or "objects" in Kubernetes that allow you to create a declarative-style application architecture that Kubernetes will execute on your behalf.

Software and hardware instability are a reality in all environments. As applications need higher and higher availability, shortcomings in the infrastructure become more obvious. Kubernetes was purpose-built to help solve this challenge for containerized applications. But what about Kubernetes itself? As cluster operators, do we shift from watching our individual servers like hawks to watching our single Kubernetes control infrastructure?

As it turns out, this aspect was one of the design considerations for Kubernetes. One of the design goals of Kubernetes is to be able to withstand instability in its own infrastructure. This means that when set up properly, the Kubernetes control...