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

Chapter 5

  1. Correct answer: (D) Ingress controller. An Ingress controller is an add-on component used to expose services – it is not part of the control plane.
  2. Correct answer: (D) ETCD. ETCD is the database that Kubernetes uses to store all objects and their state.
  3. Correct answer: (C) kube-scheduler. kube-scheduler uses various criteria from kubelet on each worker node to schedule a workload.
  4. Correct answer: (B) -v. The -v option enables verbose output from a kubectl command.
  5. Correct answer: (D) NodePort. When you create a NodePort service, it will be assigned a port between 30000-32767. Each node will be updated with the service and the port to access it. Since each node knows the service, any node can service the incoming request.
  6. Correct answer: (A) StatefulSet. A StatefulSet will create each pod with a known name, based on the name assigned in the manifest. Each pod will receive the name with a number appended to it. To provide creation controls, as...