Book Image

Kubernetes and Docker - An Enterprise Guide

By : Scott Surovich, Marc Boorshtein
Book Image

Kubernetes and Docker - An Enterprise Guide

By: Scott Surovich, Marc Boorshtein

Overview of this book

Containerization has changed the DevOps game completely, with Docker and Kubernetes playing important roles in altering the flow of app creation and deployment. This book will help you acquire the knowledge and tools required to integrate Kubernetes clusters in an enterprise environment. The book begins by introducing you to Docker and Kubernetes fundamentals, including a review of basic Kubernetes objects. You’ll then get to grips with containerization and understand its core functionalities, including how to create ephemeral multinode clusters using kind. As you make progress, you’ll learn about cluster architecture, Kubernetes cluster deployment, and cluster management, and get started with application deployment. Moving on, you’ll find out how to integrate your container to a cloud platform and integrate tools including MetalLB, externalDNS, OpenID connect (OIDC), pod security policies (PSPs), Open Policy Agent (OPA), Falco, and Velero. Finally, you will discover how to deploy an entire platform to the cloud using continuous integration and continuous delivery (CI/CD). By the end of this Kubernetes book, you will have learned how to create development clusters for testing applications and Kubernetes components, and be able to secure and audit a cluster by implementing various open-source solutions including OpenUnison, OPA, Falco, Kibana, and Velero.
Table of Contents (20 chapters)
1
Section 1: Docker and Container Fundamentals
5
Section 2: Creating Kubernetes Development Clusters, Understanding objects, and Exposing Services
9
Section 3: Running Kubernetes in the Enterprise

Questions

  1. True or false – containers are "lightweight VMs."

    A. True

    B. False

  2. Can a container access resources from its host?

    A. No, it's isolated.

    B. If marked as privileged, yes.

    C. Only if explicitly granted by a policy.

    D. Sometimes.

  3. How could an attacker gain access to a cluster through a container?

    A. A bug in the container's application can lead to a remote code execution, which can be used to break out of a vulnerable container and then used to get the kubelet's credentials.

    B. 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.

    C. Both of the above.

  4. How does the PodSecurityPolicy admission controller determine which policy to apply to a pod?

    A. By reading an annotation on the pod's definition

    B. By comparing the pod's requested capabilities and the policies authorized via the union of the...