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

Deploying GitLab

When building a GitOps pipeline, one of the most important components is a Git repository. GitLab has many components besides just Git, including a UI for navigating code, a web-based integrated development environment (IDE) for editing code, and a robust identity implementation to manage access to projects in a multi-tenant environment. This makes it a great solution for our platform since we can map our "roles" to GitLab groups.

In this section, we're going to deploy GitLab into our cluster and create two simple repositories that we'll use later when we deploy Tekton and ArgoCD. We'll focus on the automation steps when we revisit OpenUnison to automate our pipeline deployments.

GitLab deploys with a Helm chart. For this book, we built a custom values file to run a minimal install. While GitLab comes with features that are similar to ArgoCD and Tekton, we won't be using them. We also didn't want to worry about high availability...