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 discussed availability as an important part of the CIA triad. We discussed the importance of resource management and real-time resource monitoring from a security standpoint. We then introduced resource requests and limits, core concepts for resource management in Kubernetes. Next, we discussed resource management and how cluster administrators can proactively ensure that Kubernetes objects can be prevented from misbehaving.

We dived deep into the details of namespace resource quotas and limit ranges and looked at examples on how to set it up. We then shifted gears to resource monitoring. We looked at some built-in monitors that are available as part of Kubernetes, including Dashboard and Metrics Server. Finally, we looked at a number of third-party tools – Prometheus and Grafana – that are much more powerful and preferred by most cluster administrators and DevOps engineers.

Using resource management, cluster administrators can ensure...