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  • Book Overview & Buying Becoming KCNA Certified
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Becoming KCNA Certified

Becoming KCNA Certified

By : Dmitry Galkin
5 (6)
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Becoming KCNA Certified

Becoming KCNA Certified

5 (6)
By: Dmitry Galkin

Overview of this book

The job market related to the cloud and cloud-native technologies is both growing and becoming increasingly competitive, making certifications like KCNA a great way to stand out from the crowd and learn about the latest advancements in cloud technologies. Becoming KCNA Certified doesn't just give you the practical skills needed to deploy and connect applications in Kubernetes, but it also prepares you to pass the Kubernetes and Cloud Native Associate (KCNA) exam on your first attempt. The book starts by introducing you to cloud-native computing, containers, and Kubernetes through practical examples, allowing you to test the theory out for yourself. You'll learn how to configure and provide storage for your Kubernetes-managed applications and explore the principles of modern cloud-native architecture and application delivery, giving you a well-rounded view of the subject. Once you've been through the theoretical and practical aspects of the book, you'll get the chance to test what you’ve learnt with two mock exams, with explanations of the answers, so you'll be well-prepared to appear for the KCNA exam. By the end of this Kubernetes book, you'll have everything you need to pass the KCNA exam and forge a career in Kubernetes and cloud-native computing.
Table of Contents (22 chapters)
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1
Part 1: The Cloud Era
4
Part 2: Performing Container Orchestration
7
Part 3: Learning Kubernetes Fundamentals
12
Part 4: Exploring Cloud Native
16
Part 5: KCNA Exam and Next Steps

Exploring container technology

Before we move on to the practical part, we still need to figure out the technology behind containers and who created it. The technology behind Linux containers was developed quite a long time ago and is based on two fundamental kernel features:

  • cgroups (control groups)
  • Namespaces

cgroups

cgroups is a mechanism that allows processes to be organized into hierarchical groups. How resources (CPU, memory, disk I/O throughput, and so on) are used by those groups can be limited, monitored, and controlled.

cgroups were initially developed by engineers at Google and first released in 2007. Since early 2008, cgroups functionality was merged into the Linux kernel and has been present ever since. In 2016, a revised version of cgroups was released and it is now known as cgroups version 2.

Even before cgroups, in 2002, the Linux namespaces feature was developed.

Linux kernel namespaces

This Linux feature allows you to partition kernel...

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