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

Understanding OpenID Connect

OpenID Connect is a standard identity federation protocol. It's built on the OAuth2 specification and has some very powerful features that make it the preferred choice for interacting with Kubernetes clusters.

The main benefits of OpenID Connect are as follows:

  • Short-lived tokens: If a token is leaked, such as via a log message or breach, you want the token to expire as quickly as possible. With OIDC, you're able to specify tokens that can live for 1-2 minutes, which means the token will likely be expired by the time an attacker attempts to use it.
  • User and group memberships: When we start talking about authorizations, we'll see quickly that it's important to manage access by groups instead of managing access by referencing users directly. OIDC tokens can embed both the user's identifier and their groups, leading to easier access management.
  • Refresh tokens scoped to timeout policies: With short-lived tokens...