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Learn Kubernetes Security

Learn Kubernetes Security

By : Kaizhe Huang, Pranjal Jumde
5 (10)
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Learn Kubernetes Security

Learn Kubernetes Security

5 (10)
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)
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1
Section 1: Introduction to Kubernetes
7
Section 2: Securing Kubernetes Deployments and Clusters
14
Section 3: Learning from Mistakes and Pitfalls

Introduction to OPA

OPA is an open source policy engine that allows policy enforcement in Kubernetes. Several open source projects, such as Istio, utilize OPA to provide finer-grained controls. OPA is an incubating project hosted by Cloud Native Computing Foundation (CNCF).

OPA is deployed as a service alongside your other services. To make authorization decisions, the microservice makes a call to OPA to decide whether the request should be allowed or denied. Authorization decisions are offloaded to OPA, but this enforcement needs to be implemented by the service itself. In Kubernetes environments, it is often used as a validating webhook:

Figure 7.2 – Open Policy Agent

To make a policy decision, OPA needs the following:

  • Cluster information: The state of the cluster. The objects and resources available in the cluster are important for OPA to make a decision about whether a request should be allowed or not.
  • Input query: The parameters...
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Learn Kubernetes Security
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