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. Are OPA and GateKeeper the same thing?

    A. Yes.

    B. NO.

  2. How is Rego code stored in GateKeeper?

    A. It is stored as ConfigMap objects that are watched.

    B. Rego has to be mounted to the Pod.

    C. Rego needs to be stored as secret objects.

    D. Rego is saved as a ConstraintTemplate.

  3. How do you test Rego policies?

    A. In production

    B. Using an automated framework built directly into OPA

    C. By first compiling to Web Assembly

  4. In Rego, how do you write a for loop?

    A. You don't need to; Rego will identify iterative steps.

    B. By using the for all syntax.

    C. By initializing counters in a loop.

    D. There are no loops in Rego.

  5. What is the best way to debug Rego policies?

    A. Use an IDE to attach to the GateKeeper container in a cluster.

    B. In production.

    C. Add trace functions to your code and run the opa test command with -v to see execution traces.

    D. Include System.out statements.

  6. Constraints all need to be hardcoded.

    A. True.

    B. False.

  7. GateKeeper can replace Pod security policies...