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

Information Disclosure

Information disclosure is when sensitive data is leaked. There are lots of ways it can happen, from leaving an insecure USB drive on a plane, all the way to data stores being hacked and APIs that unintentionally expose sensitive data.

Protecting Cluster Data

In the Kubernetes world, the entire configuration of the cluster is stored in the cluster store (currently etcd). This includes network and storage configuration, as well as passwords and other sensitive data stored in Secrets. For obvious reasons, this makes the cluster store a prime target for information disclosure attacks.

As a minimum, you should limit and audit access to the nodes hosting the cluster store. As will be seen in the next paragraph, gaining access to a cluster node can allow the logged-on user to bypass some of the security layers.

Kubernetes 1.7 introduced encryption of Secrets but doesn't enable it by default. Even when this becomes default, the Data Encryption Key (DEK...