Book Image

Kubernetes – An Enterprise Guide - Second Edition

By : Marc Boorshtein, Scott Surovich
Book Image

Kubernetes – An Enterprise Guide - Second Edition

By: Marc Boorshtein, Scott Surovich

Overview of this book

Kubernetes has taken the world by storm, becoming the standard infrastructure for DevOps teams to develop, test, and run applications. With significant updates in each chapter, this revised edition will help you acquire the knowledge and tools required to integrate Kubernetes clusters in an enterprise environment. The book introduces you to Docker and Kubernetes fundamentals, including a review of basic Kubernetes objects. You’ll get to grips with containerization and understand its core functionalities such as creating ephemeral multinode clusters using KinD. The book has replaced PodSecurityPolicies (PSP) with OPA/Gatekeeper for PSP-like enforcement. You’ll integrate your container into a cloud platform and tools including MetalLB, externalDNS, OpenID connect (OIDC), Open Policy Agent (OPA), Falco, and Velero. After learning to deploy your core cluster, you’ll learn how to deploy Istio and how to deploy both monolithic applications and microservices into your service mesh. Finally, you will discover how to deploy an entire GitOps platform to Kubernetes using continuous integration and continuous delivery (CI/CD).
Table of Contents (17 chapters)
15
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16
Index

Questions

  1. True or false – containers are "lightweight VMs."
    1. True
    2. False
  2. Can a container access resources from its host?
    1. No, it's isolated.
    2. If marked as privileged, yes.
    3. Only if explicitly granted by a policy.
    4. Sometimes.
  3. How could an attacker gain access to a cluster through a container?
    1. A bug in the container's application can lead to a remote code execution, which can be used in a breakout of a vulnerable container, and is then used to get the kubelet's credentials.
    2. Compromised credentials with the ability to create a container in one namespace can be used to create a container that mounts the node's filesystem to get the kubelet's credentials.
    3. Both of the above.
  4. How does the PodSecurityPolicy admission controller determine which policy to apply to a Pod?
    1. By reading an...