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Mastering Kubernetes

You're reading from   Mastering Kubernetes Dive into Kubernetes and learn how to create and operate world-class cloud-native systems

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Product type Paperback
Published in Jun 2023
Publisher Packt
ISBN-13 9781804611395
Length 746 pages
Edition 4th Edition
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Author (1):
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Gigi Sayfan Gigi Sayfan
Author Profile Icon Gigi Sayfan
Gigi Sayfan
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Table of Contents (21) Chapters Close

Preface 1. Understanding Kubernetes Architecture 2. Creating Kubernetes Clusters FREE CHAPTER 3. High Availability and Reliability 4. Securing Kubernetes 5. Using Kubernetes Resources in Practice 6. Managing Storage 7. Running Stateful Applications with Kubernetes 8. Deploying and Updating Applications 9. Packaging Applications 10. Exploring Kubernetes Networking 11. Running Kubernetes on Multiple Clusters 12. Serverless Computing on Kubernetes 13. Monitoring Kubernetes Clusters 14. Utilizing Service Meshes 15. Extending Kubernetes 16. Governing Kubernetes 17. Running Kubernetes in Production 18. The Future of Kubernetes 19. Other Books You May Enjoy
20. Index

Advanced scheduling

One of the strongest suits of Kubernetes is its powerful yet flexible scheduler. The job of the scheduler, put simply, is to choose nodes to run newly created pods. In theory the scheduler could even move existing pods around between nodes, but in practice it doesn’t do that at the moment and instead leaves this functionality for other components.

By default, the scheduler follows several guiding principles, including:

  • Split pods from the same replica set or stateful set across nodes
  • Schedule pods to nodes that have enough resources to satisfy the pod requests
  • Balance out the overall resource utilization of nodes

This is pretty good default behavior, but sometimes you may want better control over specific pod placement. Kubernetes 1.6 introduced several advanced scheduling options that give you fine-grained control over which pods are scheduled or not scheduled on which nodes as well as which pods are to be scheduled together or separately.

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