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The KCNA Book

You're reading from The KCNA Book

Product type Book

Published in Jun 2023

Publisher Packt

ISBN-13 9781835080399

Pages 197 pages

Edition 1st Edition

Languages

Concepts

Containerization

Author (1):

Nigel Poulton

Table of Contents (12) Chapters

1. Getting started

2. 1: Setting the scene

3. 2: Cloud native architecture

4. 3: Container orchestration

5. 4: Kubernetes Fundamentals

6. 5: Cloud native application delivery

7. 6: Cloud native observability

8. The exam

9. 8: Sample test

10. What next

Appendix A: Chapter quiz answers

1. Appendix B: Sample Test answers

Exam essentials

Autoscaling: Autoscaling is the ability for applications and infrastructure to automatically grow and shrink to meet demand. When demand goes up, more application instances and more infrastructure can be dynamically added to the environment. When demand drops, application instances and infrastructure can be removed. Kubernetes has a horizontal pod autoscaler to add and remove application instances to meet demand. It also has a cluster autoscaler that integrates with cloud platforms to add and remove nodes to meet infrastructure requirements. Metrics are used to make scaling decisions. Basic metrics include CPU and memory, whereas custom application metrics include things such as queue length and request response time.
Serverless: Serverless is a modern event-driven computing model where small functions are associated with specific events and only execute when those events occur. Sometimes we call it Function as a Service (FaaS) and many public clouds offer proprietary...

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Authors (1)

Nigel Poulton

Nigel Poulton is a cloud-native subject matter expert who spends his life creating books and training videos on the latest cloud technologies. He is the author of best-selling books on Docker and Kubernetes and the most popular online training videos on the same topic. He is a Docker Captain. Prior to this, Nigel has held various infrastructure roles for large enterprises. When he is not playing with technology, he is dreaming about it. When he is not dreaming about it, he is reading and watching sci-fi. He wishes he lived in the future so he could explore spacetime, the universe, and tons of other mind-blowing stuff. He likes cars, football (soccer), and food. He has a fabulous wife and three children.

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