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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

Summary

In this chapter, we’ve seen Kubernetes’ self-healing capabilities in action and how K8s reconciliation loops allow it to reach the desired state of resources in a very short time. Since Pods themselves do not have any means to recover from a failure, we commonly use Kubernetes Deployments to ensure that the requested number of application replicas are running. Deployments also allow us to perform controllable rolling updates, rollbacks, and zero-downtime deployments to enable rapid software development cycles that require the frequent release of versions.

DaemonSet is another resource for the scenario when we need to run one replica of the application on each or a particular set of nodes. DaemonSets are often used for running logging or monitoring agents across the cluster.

StatefulSet is a resource for managing stateful workloads with Kubernetes. It allows us to easily integrate volumes to Pods to keep persistent data between container restarts and automate...

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