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

Kubernetes components

Kubernetes follows a client-server architecture. In Kubernetes, multiple master nodes control multiple worker nodes. Each master and worker has a set of components that are required for the cluster to work correctly. A master node generally has kube-apiserver, etcd storage, kube-controller-manager, cloud-controller-manager, and kube-scheduler. The worker nodes have kubelet, kube-proxy, a Container Runtime Interface (CRI) component, a Container Storage Interface (CRI) component, and so on. We will go through each of them in detail now:

  • kube-apiserver: The Kubernetes API server (kube-apiserver) is a control-plane component that validates and configures data for objects such as pods, services, and controllers. It interacts with objects using REST requests.
  • etcd: etcd is a high-availability key-value store used to store data such as configuration, state, and metadata. The watch functionality of etcd provides Kubernetes with the ability to listen for updates...