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

Detecting anomalies with Falco

Falco is a CNCF open source project that detects anomalous behavior or runtime threats in cloud-native environments, such as a Kubernetes cluster. It is a rule-based runtime detection engine with about 100 out-of-the-box detection rules. In this section, we will first take an overview of Falco, and then we will show you how to write Falco rules so that you can build your own Falco rules to protect your Kubernetes cluster.

An overview of Falco

Falco is widely used to detect anomalous behavior in cloud-native environments, especially in the Kubernetes cluster. So, what is anomaly detection? Basically, it uses behavioral signals to detect security abnormalities, such as leaked credentials or unusual activity, and the behavioral signals can be derived from your knowledge of the entities in terms of what the normal behavior is.

Challenges faced

To identify what normal behaviors are in the Kubernetes cluster is not easy. From a running application...