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

Securing kube-apiserver

kube-apiserver is the gateway to your cluster. It implements a representational state transfer (REST) application programming interface (API) to authorize and validate requests for objects. It is the central gateway that communicates and manages other components within the Kubernetes cluster. It performs three main functions:

  • API management: kube-apiserver exposes APIs for cluster management. These APIs are used by developers and cluster administrators to modify the state of the cluster.
  • Request handling: Requests for object management and cluster management are validated and processed.
  • Internal messaging: The API server interacts with other components in the cluster to ensure the cluster functions properly.

A request to the API server goes through the following steps before being processed:

  1. Authentication: kube-apiserver first validates the origin of the request. kube-apiserver supports multiple modes of authentication including...