Book Image

Learn Kubernetes Security

By : Kaizhe Huang, Pranjal Jumde
Book Image

Learn Kubernetes Security

By: Kaizhe Huang, Pranjal Jumde

Overview of this book

Kubernetes is an open source orchestration platform for managing containerized applications. Despite widespread adoption of the technology, DevOps engineers might be unaware of the pitfalls of containerized environments. With this comprehensive book, you'll learn how to use the different security integrations available on the Kubernetes platform to safeguard your deployments in a variety of scenarios. Learn Kubernetes Security starts by taking you through the Kubernetes architecture and the networking model. You'll then learn about the Kubernetes threat model and get to grips with securing clusters. Throughout the book, you'll cover various security aspects such as authentication, authorization, image scanning, and resource monitoring. As you advance, you'll learn about securing cluster components (the kube-apiserver, CoreDNS, and kubelet) and pods (hardening image, security context, and PodSecurityPolicy). With the help of hands-on examples, you'll also learn how to use open source tools such as Anchore, Prometheus, OPA, and Falco to protect your deployments. By the end of this Kubernetes book, you'll have gained a solid understanding of container security and be able to protect your clusters from cyberattacks and mitigate cybersecurity threats.
Table of Contents (19 chapters)
Section 1: Introduction to Kubernetes
Section 2: Securing Kubernetes Deployments and Clusters
Section 3: Learning from Mistakes and Pitfalls

Chapter 5: Configuring Kubernetes Security Boundaries

A security boundary separates security domains where a set of entities share the same security concerns and access levels, whereas a trust boundary is a dividing line where program execution and data change the level of trust. Controls in the security boundary ensure that execution moving between boundaries does not elevate the trust level without appropriate validation. As data or execution moves between security boundaries without appropriate controls, security vulnerabilities show up.

In this chapter, we'll discuss the importance of security and trust boundaries. We'll first focus on the introduction to clarify any confusion between security and trust boundaries. Then, we'll walk through the security domains and security boundaries within the Kubernetes ecosystem. Finally, we'll look at some Kubernetes features that enhance security boundaries for an application deployed in Kubernetes.

You should understand...