Book Image

The Kubernetes Book

By : Nigel Poulton, Pushkar Joglekar
Book Image

The Kubernetes Book

By: Nigel Poulton, Pushkar Joglekar

Overview of this book

Kubernetes is the leading orchestrator of cloud-native apps. With knowledge of how to work with Kubernetes, you can easily deploy and manage applications on the cloud or in your on-premises data center. The book begins by introducing you to Kubernetes and showing you how to install it. You’ll learn how to use Kubernetes Services and bring stable and reliable networking to apps that are deployed on Kubernetes. You'll delve deep into the powerful storage subsystem of Kubernetes and learn how to leverage the variety of external storage backends in your applications. As the book progresses, it shows you how to use features such as DaemonSets, Helm, and RBAC to enhance your Kubernetes applications. You'll explore the six categories of identifying vulnerabilities and look at a few ways to prevent and mitigate them. You'll also look at ways to secure the software delivery pipeline by discussing some image-related best practices. The book ends by sharing with you some resources that’ll help take your Kubernetes knowledge to the next level. By the end of the book, you’ll have the confidence and skills to leverage all the features of Kubernetes to develop scalable applications.
Table of Contents (23 chapters)
Free Chapter
1
Chapter 1
3
Chapter 2
5
Chapter 3
7
Chapter 4
9
Chapter 5
11
Chapter 6
13
Chapter 7
15
Chapter 8
17
Chapter 9
19
Chapter 10
21
Chapter 11

Demo

In this section, we'll walk through a demo that uses a StorageClass. The basic steps of the demo will be:

  1. Create a StorageClass.
  2. Create a PVC.
  3. Create a Pod.

The Pod will mount a volume using the PVC, which, in turn, will trigger the SC to dynamically create a PV. The demo will be on the Google Cloud Platform and assumes you have a working cluster with kubectl correctly configured.

Cleanup

If you've been following along, you'll have a Pod, a PVC, and PV already created. Let's delete these before we go ahead with the demo:

$ kubectl delete pods volpod
pod "volpod" deleted
$ kubectl delete pvc pvc1
persistentvolumeclaim "pvc1" deleted
$ kubectl delete pv pv1
persistentvolume "pv1" deleted

Creating a StorageClass

We'll use the following YAML to create a StorageClass called slow based on Google GCE standard persistent disks. We won't get into the details of the storage backend, but suffice...