Book Image

Learn Kubernetes Security

By : Kaizhe Huang, Pranjal Jumde
5 (1)
Book Image

Learn Kubernetes Security

5 (1)
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)
1
Section 1: Introduction to Kubernetes
7
Section 2: Securing Kubernetes Deployments and Clusters
14
Section 3: Learning from Mistakes and Pitfalls

Summary

In this chapter, we looked at the importance of authentication and authorization in Kubernetes. We discussed the different modules available for authentication and authorization and discussed these modules in detail, as well as going through detailed examples of how each module is used. When looking at authentication, we discussed user impersonation, which can be used by cluster administrators or developers to test permissions. Next, we talked about admission controllers, which can be used to validate or mutate requests after authentication and authorization. We also discussed some admission controllers in detail. Finally, we looked at OPA, which can be used in Kubernetes clusters to perform a more fine-grained level of authorization.

Now, you should be able to devise appropriate authentication and authorization strategies for your cluster. You should be able to figure out which admission controllers work for your environment. In many cases, you'll need more granular...