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

Pod Security Policies

As we've seen throughout the chapter, we can enable security settings on a per-Pod basis by setting security context attributes in individual Pod YAML files. However, this approach doesn't scale, requires developers and operators to remember to do this for every Pod, and is prone to errors. Pod Security Policies offer a better way.

Pod Security Policies are a relatively new feature that allow us to define security settings at the cluster level. We can then apply these to targeted sets of Pods as part of the deployment process. As such, this solution scales better, requires less work from developers and admins, and is less prone to error. It also lends itself to situations where you have a team dedicated to securing apps in production.

Pod Security Policies are implemented as an admission controller, and in order to use them, a Pod's serviceAccount must be authorized to use it. Once this is done, their policies are applied to new requests to...