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Certified Kubernetes Administrator (CKA) Exam Guide

You're reading from   Certified Kubernetes Administrator (CKA) Exam Guide Validate your knowledge of Kubernetes and implement it in a real-life production environment

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Product type Paperback
Published in Nov 2022
Publisher Packt
ISBN-13 9781803238265
Length 322 pages
Edition 1st Edition
Concepts
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Author (1):
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Mélony Qin Mélony Qin
Author Profile Icon Mélony Qin
Mélony Qin
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Toc

Table of Contents (17) Chapters Close

Preface 1. Part 1: Cluster Architecture, Installation, and Configuration
2. Chapter 1: Kubernetes Overview FREE CHAPTER 3. Chapter 2: Installing and Configuring Kubernetes Clusters 4. Chapter 3: Maintaining Kubernetes Clusters 5. Part 2: Managing Kubernetes
6. Chapter 4: Application Scheduling and Lifecycle Management 7. Chapter 5: Demystifying Kubernetes Storage 8. Chapter 6: Securing Kubernetes 9. Chapter 7: Demystifying Kubernetes Networking 10. Part 3: Troubleshooting
11. Chapter 8: Monitoring and Logging Kubernetes Clusters and Applications 12. Chapter 9: Troubleshooting Cluster Components and Applications 13. Chapter 10: Troubleshooting Security and Networking 14. Index 15. Other Books You May Enjoy Appendix - Mock CKA scenario-based practice test resolutions

Resource management

Kubernetes allows us to specify the resource requirements of a container in the pod specification, which basically refers to how many resources a container needs.

kube-scheduler uses the resource request information that you specify for a container in a pod to decide on which worker node to schedule the pod. It’s up to kubelet to enforce these resource limits when you specify them for the containers in the pod so that the running container goes beyond a set limit, as well as reserves at least the requested amount of a system resource for a container to use.

It usually gives us the following values:

  • resources.limits.cpu is the resource limit set on CPU usage.
  • resources.limits.memory is the resource limit set on memory usage.
  • resources.requests.cpu is the minimum CPU usage requested to allow your application to be up and running.
  • resources.requests.memory is the minimum memory usage requested to allow your application to be up and...
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