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

Virtualisation

In the distant past we deployed one application per physical server. This was a huge waste of physical resources and company capital. It also delayed the rollout of applications while physical servers were procured, racked, patched into the network, and had an operating system installed.

Virtualisation technologies like VMware came along and opened the door for us to run multiple applications on a single physical server. This meant we didn’t have to buy a new server for every new app, we could deploy apps very quickly to virtual machines on existing servers and avoid all of the following:

  • No more waiting for finance to approve server purchases
  • No more waiting for the datacenter team to rack and cable servers
  • No more waiting for the network team to authorise servers on the network
  • No more waiting for sysadmins to install operating systems

Almost immediately we went from wasting money on over-powered physical servers that took ages to purchase and install...