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

Introducing the Kubernetes service

Kubernetes deployments create and destroy pods dynamically. For a general three-tier web architecture, this can be a problem if the frontend and backend are different pods. Frontend pods don't know how to connect to the backend. Network service abstraction in Kubernetes resolves this problem.

The Kubernetes service enables network access for a logical set of pods. The logical set of pods are usually defined using labels. When a network request is made for a service, it selects all the pods with a given label and forwards the network request to one of the selected pods.

A Kubernetes service is defined using a YAML Ain't Markup Language (YAML) file, as follows:

apiVersion: v1
kind: Service
metadata:
  name: service-1
spec:
  type: NodePort 
  selector:
    app: app-1
  ports:
    - nodePort: 29763
      protocol: TCP
 ...