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)
Section 1: Docker and Container Fundamentals
Section 2: Creating Kubernetes Development Clusters, Understanding objects, and Exposing Services
Section 3: Running Kubernetes in the Enterprise

Chapter 11

  1. Correct answer: (B) False. GateKeeper is a tool originally built by Microsoft on top of OPA, but they are not the same thing.
  2. Correct answer: (D) Rego is saved as a ConstraintTemplate, which is a CustomResourceDefenition defined by the GateKeeper project.
  3. Correct answer: (B) Using an automated framework built directly into OPA. OPA's automated testing framework provides a powerful way to pre-validate Rego before deploying to GateKeeper.
  4. Correct answer: (A) You don't need to as Rego will identify iterative steps. When using loops in Rego, use either the underscore to resolve all values or a placeholder (such as I or j) for array indexes. Rego will fill the counter by iterating over the array.
  5. Correct answer: (C) Add trace functions to your code and run the opa test command with -v to see execution traces. opa will tell you where the problem is. Use its built-in tools.
  6. Correct answer: (B) False. Constraint templates can include parameters...