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Managing Kubernetes Resources Using Helm

You're reading from   Managing Kubernetes Resources Using Helm Simplifying how to build, package, and distribute applications for Kubernetes

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Product type Paperback
Published in Sep 2022
Publisher Packt
ISBN-13 9781803242897
Length 310 pages
Edition 2nd Edition
Tools
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Authors (2):
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Andrew Block Andrew Block
Author Profile Icon Andrew Block
Andrew Block
Austin Dewey Austin Dewey
Author Profile Icon Austin Dewey
Austin Dewey
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Table of Contents (18) Chapters Close

Preface 1. Part 1: Introduction and Setup FREE CHAPTER
2. Chapter 1: Understanding Kubernetes and Helm 3. Chapter 2: Preparing a Kubernetes and Helm Environment 4. Chapter 3: Installing Your First App with Helm 5. Part 2: Helm Chart Development
6. Chapter 4: Scaffolding a New Helm Chart 7. Chapter 5: Helm Dependency Management 8. Chapter 6: Understanding Helm Templates 9. Chapter 7: Helm Lifecycle Hooks 10. Chapter 8: Publishing to a Helm Chart Repository 11. Chapter 9: Testing Helm Charts 12. Part 3: Advanced Deployment Patterns
13. Chapter 10: Automating Helm with CD and GitOps 14. Chapter 11: Using Helm with the Operator Framework 15. Chapter 12: Helm Security Considerations 16. Index 17. Other Books You May Enjoy

Rolling back the WordPress release

While moving forward is preferred, there are some occasions where it makes more sense to return to a previous version of the application. The helm rollback command exists to satisfy this use case. Let’s describe how to roll back the WordPress release to a previous state.

Inspecting the WordPress history

Every Helm release has a history of revisions. A revision is used to track the values, Kubernetes resources, and the chart version that were used in a particular release version. A new revision is created when a chart is installed, upgraded, or rolled back. Revision data is saved in Kubernetes Secrets by default (other options are ConfigMaps, local memory, or a PostgreSQL database, as determined by the HELM_DRIVER environment variable). This allows your Helm release to be managed and interacted with by different users on the Kubernetes cluster, provided they have the appropriate Role-Based Access Control (RBAC) permissions to view or modify...

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