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Mastering Kubernetes

You're reading from  Mastering Kubernetes

Product type Book
Published in May 2017
Publisher Packt
ISBN-13 9781786461001
Pages 426 pages
Edition 1st Edition
Languages
Author (1):
Gigi Sayfan Gigi Sayfan
Profile icon Gigi Sayfan
Toc

Table of Contents (22) Chapters close

Mastering Kubernetes
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
1. Understanding Kubernetes Architecture 2. Creating Kubernetes Clusters 3. Monitoring, Logging, and Troubleshooting 4. High Availability and Reliability 5. Configuring Kubernetes Security, Limits, and Accounts 6. Using Critical Kubernetes Resources 7. Handling Kubernetes Storage 8. Running Stateful Applications with Kubernetes 9. Rolling Updates, Scalability, and Quotas 10. Advanced Kubernetes Networking 11. Running Kubernetes on Multiple Clouds and Cluster Federation 12. Customizing Kubernetes - API and Plugins 13. Handling the Kubernetes Package Manager 14. The Future of Kubernetes Index

Live cluster upgrades


One of the most complicated and risky tasks involved in running a Kubernetes cluster is a live upgrade. The interactions between different parts of the system of different versions are often difficult to predict, but in many situations, it is required. Large clusters with many users can't afford to be offline for maintenance. The best way to attack complexity is to divide and conquer. Microservice architecture helps a lot here. You never upgrade your entire system. You just constantly upgrade several sets of related microservices, and if APIs have changed then you upgrade their clients, too. A properly designed upgrade will preserve backward-compatibility at least until all clients have been upgraded, and then deprecate old APIs across several releases.

In this section, we will discuss how to go about upgrading your cluster using various strategies, such as rolling upgrades and blue-green upgrades. We will also discuss when it's appropriate to introduce breaking upgrades...

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