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The Kubernetes Workshop

The Kubernetes Workshop

By : Zachary Arnold , Sahil Dua , Wei Huang , Faisal Masood, Mélony Qin, Mohammed Abu Taleb
4.9 (9)
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The Kubernetes Workshop

The Kubernetes Workshop

4.9 (9)
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)
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Preface

Volumes

Let's say we have a pod that stores some data locally on a disk. Now, if the container that's storing the data crashes and is restarted, the data will be lost. The new container will start with an empty disk space allocated. Thus, we cannot rely on containers themselves even for the temporary storage of data.

We may also have a case where one container in a pod stores some data that needs to be accessed by other containers in the same pod as well.

The Kubernetes Volume abstraction solves both of these problems. Here's a diagram showing Volumes and their interaction with physical storage and the application:

Figure 9.1: Volume as a storage abstraction for applications

As you can see from this diagram, a Volume is exposed to the applications as an abstraction, which eventually stores the data on any type of physical storage that you may be using.

The lifetime of a Kubernetes Volume is the same as that of the pod that uses it. In...

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