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

The Big Picture

First things first, Kubernetes supports lots of types of storage from lots of different places. For example, Internet Small Computer System Interface (iSCSI), Server Message Block (SMB), Network File System (NFS), and object storage blobs, all from a variety of external storage systems that can be in the cloud or in your on-premises data center. However, no matter what type of storage you have, or where it comes from, when it's surfaced on your Kubernetes cluster, it's called a volume. For example, Azure File resources surfaced in Kubernetes are called volumes, as are block devices from AWS Elastic Block Store (EBS). All storage on a Kubernetes cluster is called a volume.

Figure 7.1 shows the high-level architecture:

Figure 7.1: High-level architecture

On the left, we've got storage providers. They can be your traditional enterprise storage arrays from vendors such as EMC and NetApp, or they can be cloud storage services such...