You're reading from Becoming KCNA Certified Build a strong foundation in cloud native and Kubernetes and pass the KCNA exam with ease

Product type Paperback

Published in Feb 2023

Publisher Packt

ISBN-13 9781804613399

Length 306 pages

Edition 1st Edition

Tools

Kubernetes

Concepts

Cloud Native

Author (1):

Dmitry Galkin

View More author details

Table of Contents (22) Chapters

Preface

1. Part 1: The Cloud Era

2. Chapter 1: From Cloud to Cloud Native and Kubernetes FREE CHAPTER

3. Chapter 2: Overview of CNCF and Kubernetes Certifications

4. Part 2: Performing Container Orchestration

5. Chapter 3: Getting Started with Containers

6. Chapter 4: Exploring Container Runtimes, Interfaces, and Service Meshes

7. Part 3: Learning Kubernetes Fundamentals

8. Chapter 5: Orchestrating Containers with Kubernetes

9. Chapter 6: Deploying and Scaling Applications with Kubernetes

10. Chapter 7: Application Placement and Debugging with Kubernetes

11. Chapter 8: Following Kubernetes Best Practices

12. Part 4: Exploring Cloud Native

13. Chapter 9: Understanding Cloud Native Architectures

14. Chapter 10: Implementing Telemetry and Observability in the Cloud

15. Chapter 11: Automating Cloud Native Application Delivery

16. Part 5: KCNA Exam and Next Steps

17. Chapter 12: Practicing for the KCNA Exam with Mock Papers

18. Chapter 13: The Road Ahead

19. Assessments

20. Index

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The Kubernetes API

As we learned previously, the Kubernetes API server is the main gateway for all cluster operations. When we want to know the state of the cluster, the number of nodes or pods or other resources, and their state, we need to use the Kubernetes API. The same is valid for all operations, such as creating new pods or making changes in the specifications of other resources. In a nutshell, the API server is the brain of K8s.

There are multiple ways to interact with the Kubernetes API:

Kubectl: A command-line interface tool available for all common platforms, including Linux, Windows, and macOS. Operators very often use kubectl to interact with K8s clusters and manage or debug applications running in Kubernetes.
dashboard (kube-dashboard): A popular web-based graphical user interface. It allows you to view, create, and modify resources, as well as troubleshoot applications running in K8s. dashboard, however, does not support all functionality that kubectl...