Book Image

Becoming KCNA Certified

By : Dmitry Galkin
Book Image

Becoming KCNA Certified

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)
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

Introducing Docker

Docker has been around for quite a few years, so you may have heard about it before. For many people, the name Docker itself is synonymous with container. However, there are so many things called Docker that it is easy to get confused:

  • Docker Inc.
  • Docker Engine
  • dockerd (Docker daemon)
  • Docker CLI
  • Docker Hub
  • Docker Registry
  • Docker Swarm
  • Docker Compose
  • Docker Desktop
  • Dockershim

Let’s clarify each one.

For starters, Docker Inc. (as a company) did not invent the technology behind containers, but it created easy-to-use tools from the list that helped kickstart broader container adoption. The company was founded in 2008 and was initially called dotCloud.

Docker Engine is an open source software bundle for building and containerizing applications. It is a piece of client-server software that consists of a daemon service known as dockerd (Docker daemon) that provides a REST API (for other programs to talk to...