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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

RBAC

You’ve probably noticed that in our minikube cluster, we have unlimited access and control over all resources and namespaces. While this is fine for learning purposes, when it comes to running and operating production systems, you’ll most likely need to restrict the access. This is where Kubernetes RBAC becomes very helpful.

Kubernetes RBAC

This is the main security mechanism in Kubernetes to ensure that users only have access to resources according to their assigned roles.

A few examples of what can be done with K8s RBAC:

  • Restricting access to a specific namespace (for example, production namespace or namespace for a certain application) for a limited group of people (such as with an administrator role)
  • Restricting access to be read-only for certain resources
  • Restricting access to a certain group of resources (such as Pod, Service, Deployment, Secret, or anything else)
  • Restricting access to an application that interacts with the Kubernetes...

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