Book Image

The KCNA Book

By : Nigel Poulton
Book Image

The KCNA Book

By: Nigel Poulton

Overview of this book

There is a huge benefit in building small, specialized, single-purpose apps that can self-heal, auto scale, and update regularly without needing downtime. Kubernetes and cloud-native technologies come in handy in building such apps. Possessing the knowledge and skills to leverage Kubernetes can positively enhance possibilities in favor of architects who specialize in cloud-native microservices applications. ‘The KCNA Book’ is designed to help those working in technology with a passion to become certified in the Kubernetes and Cloud-Native Associate Exam. You will learn about containerization, microservices, and cloud-native architecture. You will learn about Kubernetes fundamentals and container orchestration. The book also sheds light on cloud-native application delivery and observability. It focuses on the KCNA exam domains and competencies, which can be applied to the sample test included in the book. Put your knowledge to the test and enhance your skills with the all-encompassing topic coverage. Upon completion, you will begin your journey to get the best roles, projects, and organizations with this exam-oriented book.
Table of Contents (12 chapters)
9
8: Sample test
Appendix B: Sample Test answers

Chapter summary

In this chapter, you learned that we used to deploy one application per physical server. This was wasteful of capital, servers, and environmental resources. It also caused long delays in application rollouts while new servers had to be procured, delivered, and installed. VMware came along and let us run multiple applications per physical server. It reduced capital expenditure and allowed more efficient use of server and environmental resources. It also allowed us to ship applications a lot faster by deploying them to virtual machines on servers we already owned.

Containers are also a form of virtualisation. They virtualise at the operating system layer and each container is a virtual operating system. Containers are faster and more efficient than virtual machines, however, out-of-the-box they’re usually less secure. The advantages of containers made it possible for us to re-think the way we develop, deploy, and manage applications.

A major innovation, enabled...