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

Kubernetes authorization

Authorization determines whether a request is allowed or denied. Once the origin of the request is identified, active authorization modules evaluate the attributes of the request against the authorization policies of the user to allow or deny a request. Each request passes through the authorization module sequentially and if any module provides a decision to allow or deny, it is automatically accepted or denied.

Request attributes

Authorization modules parse a set of attributes in a request to determine whether the request should be parsed, allowed, or denied:

  • User: The originator of the request. This is validated during authentication.
  • Group: The group that the user belongs to. This is provided in the authentication layer.
  • API: The destination of the request.
  • Request verb: The type of request, which can be GET, CREATE, PATCH, DELETE, and more.
  • Resource: The ID or name of the resource being accessed.
  • Namespace: The namespace...