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The Kubernetes Workshop

You're reading from   The Kubernetes Workshop Learn how to build and run highly scalable workloads on Kubernetes

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Product type Paperback
Published in Sep 2020
Publisher Packt
ISBN-13 9781838820756
Length 780 pages
Edition 1st Edition
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Authors (6):
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Zachary Arnold Zachary Arnold
Author Profile Icon Zachary Arnold
Zachary Arnold
Mohammed Abu Taleb Mohammed Abu Taleb
Author Profile Icon Mohammed Abu Taleb
Mohammed Abu Taleb
Wei Huang Wei Huang
Author Profile Icon Wei Huang
Wei Huang
Sahil Dua Sahil Dua
Author Profile Icon Sahil Dua
Sahil Dua
Mélony Qin Mélony Qin
Author Profile Icon Mélony Qin
Mélony Qin
Faisal Masood Faisal Masood
Author Profile Icon Faisal Masood
Faisal Masood
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Toc

Table of Contents (20) Chapters Close

Preface
1. Introduction to Kubernetes and Containers 2. An Overview of Kubernetes FREE CHAPTER 3. kubectl – Kubernetes Command Center 4. How to Communicate with Kubernetes (API Server) 5. Pods 6. Labels and Annotations 7. Kubernetes Controllers 8. Service Discovery 9. Storing and Reading Data on Disk 10. ConfigMaps and Secrets 11. Build Your Own HA Cluster 12. Your Application and HA 13. Runtime and Network Security in Kubernetes 14. Running Stateful Components in Kubernetes 15. Monitoring and Autoscaling in Kubernetes 16. Kubernetes Admission Controllers 17. Advanced Scheduling in Kubernetes 18. Upgrading Your Cluster without Downtime 19. Custom Resource Definitions in Kubernetes

The Upgrade Process

In this section, you will see the steps required to upgrade the Kubernetes platform. Note that upgrading the underlying OS is not covered here. To meet the requirement of zero-downtime upgrades, you must have an HA Kubernetes cluster with a minimum of three masters and etcd servers, which enables frictionless upgrades. The process will take one node out of the three and upgrade it. The upgraded component then will rejoin the cluster, and then we take the second node and apply the upgrade process to it. Since, at any given time, at least two of the servers are kept available, the cluster will remain available during the upgrade.

Some Considerations for kops

We have guided you through the creation of an HA Kubernetes cluster in Chapter 11, Build Your Own HA Cluster. Hence, in this chapter, we will walk you through upgrading the same cluster.

As mentioned in that chapter, there are various ways of deploying and managing a Kubernetes cluster. We have opted...

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