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

The power of PodSecurityPolicy

A Kubernetes PodSecurityPolicy is a cluster-level resource that controls security-sensitive aspects of the pod specification through which the access privileges of a Kubernetes pod are limited. As a DevOps engineer, you may want to use a PodSecurityPolicy to restrict most of the workloads run in limited access privileges, while only allowing a few workloads to be run with extra privileges.

In this section, we will first take a closer look at a PodSecurityPolicy, and then we will introduce an open source tool, kube-psp-advisor, which can help build an adaptive PodSecurityPolicy for the running Kubernetes cluster.

Understanding PodSecurityPolicy

You can think of a PodSecurityPolicy as a policy to evaluate the security attributes defined in the pod's specification. Only those pods whose security attributes meet the requirements of PodSecurityPolicy will be admitted to the cluster. For example, PodSecurityPolicy can be used to block the launch...