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

Restoring from a backup

With any luck, you will rarely need to execute a restore of any Kubernetes object. Even if you haven't been in the IT field long, you have likely experienced a personal situation where you had a drive failure, or accidentally deleted an important file. If you don't have a backup of the data that was lost, it is a very frustrating situation. In the enterprise world, missing data or not having a backup can lead to huge revenue losses, or in some scenarios, large fines in regulated industries.

To run a restore from a backup, you use the create restore command with the --from-backup <backup name> tag.

Earlier in the chapter, we created a single, one-time backup, called initial-backup, which includes every namespace and object in the cluster. If we decided that we needed to restore that backup, we would execute a restore using the Velero CLI:

velero restore create --from-backup initial-backup

The output from the restore command may seem...