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

Cost management

Effective cost management is a key part of managing cloud native apps and infrastructure, and you should always consider the following three things.

  1. Choosing the right infrastructure
  2. Rightsizing
  3. Turning unused infrastructure off

Choosing the right infrastructure

Choosing the right cloud platform is a vital decision. However, even after you’ve chosen your cloud, there are still a lot of decisions that have a high impact on costs and cost management.

For example, most clouds offer the following instance categories – instance is the technical term for a virtual server on a cloud.

  • On-demand
  • Reserved
  • Spot

On-demand instances are the most common and most flexible, however, they’re the most expensive. You can create and delete them “on demand” and they’re yours for as long as you need them.

Reserved instances come at a discounted price in exchange for a long-term commitment. For example, if you commit to a use...