Book Image

Cloud Native with Kubernetes

By : Alexander Raul
Book Image

Cloud Native with Kubernetes

By: Alexander Raul

Overview of this book

Kubernetes is a modern cloud native container orchestration tool and one of the most popular open source projects worldwide. In addition to the technology being powerful and highly flexible, Kubernetes engineers are in high demand across the industry. This book is a comprehensive guide to deploying, securing, and operating modern cloud native applications on Kubernetes. From the fundamentals to Kubernetes best practices, the book covers essential aspects of configuring applications. You’ll even explore real-world techniques for running clusters in production, tips for setting up observability for cluster resources, and valuable troubleshooting techniques. Finally, you’ll learn how to extend and customize Kubernetes, as well as gaining tips for deploying service meshes, serverless tooling, and more on your cluster. By the end of this Kubernetes book, you’ll be equipped with the tools you need to confidently run and extend modern applications on Kubernetes.
Table of Contents (22 chapters)
1
Section 1: Setting Up Kubernetes
5
Section 2: Configuring and Deploying Applications on Kubernetes
11
Section 3: Running Kubernetes in Production
16
Section 4: Extending Kubernetes

Understanding the difference between volumes and persistent volumes

A completely stateless, containerized application may only need disk space for the container files themselves. When running applications of this type, no additional configuration is required on Kubernetes.

However, this is not always true in the real world. Legacy apps that are being moved to containers may need disk space volumes for many possible reasons. In order to hold files for use by containers, you need the Kubernetes volume resource.

There are two main storage resources that can be created in Kubernetes:

  • Volumes
  • Persistent volumes

The distinction between the two is in the name: while volumes are tied to the lifecycle of a particular Pod, persistent volumes stay alive until deleted and can be shared across different Pods. Volumes can be handy in sharing data across containers within a Pod, while persistent volumes can be used for many possible advanced purposes.

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