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

Hardening container images

Container image hardening means to follow security best practices or baselines to configure a container image in order to reduce the attack surface. Image scanning tools only focus on finding publicly disclosed issues in applications bundled inside the image. But, following the best practices along with secure configuration while building the image ensures that the application has a minimal attack surface.

Before we start talking about the secure configuration baseline, let's look at what a container image is, as well as a Dockerfile, and how it is used to build an image.

Container images and Dockerfiles

A container image is a file that bundles the microservice binary, its dependencies, and configurations of the microservice, and so on. A container is a running instance of an image. Nowadays, application developers not only write code to build microservices; they also need to build the Dockerfile to containerize the microservice. To help build...