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

Benchmarking a cluster's security configuration

The Center for Internet Security (CIS) released a benchmark of Kubernetes that can be used by cluster administrators to ensure that the cluster follows the recommended security configuration. The published Kubernetes benchmark is more than 200 pages.

kube-bench is an automated tool written in Go and published by Aqua Security that runs tests documented in the CIS benchmark. The tests are written in YAML Ain't Markup Language (YAML), making it easy to evolve.

kube-bench can be run on a node directly using the kube-bench binary, as follows:

$kube-bench node --benchmark cis-1.4

For clusters hosted on gke, eks, and aks, kube-bench is run as a pod. Once the pod finishes running, you can look at the logs to see the results, as illustrated in the following code block:

$ kubectl apply -f job-gke.yaml
$ kubectl get pods
NAME               READY...