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

Communicating inside a pod

Containers inside the same pod share the same pod IP address. Usually, it is up to application developers to bundle the container images together and to resolve any possible resource usage conflicts such as port listening. In this section, we will dive into the technical details of how the communication happens among the containers inside the pod and will also highlight the communications that take place beyond the network level.

Linux namespaces and the pause container

Linux namespaces are a feature of the Linux kernel to partition resources for isolation purposes. With namespaces assigned, a set of processes sees one set of resources, while another set of processes sees another set of resources. Namespaces are a major fundamental aspect of modern container technology. It is important for readers to understand this concept in order to know Kubernetes in depth. So, we set forth all the Linux namespaces with explanations. Since Linux kernel version...