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

Primer

Google has been running Search and Gmail on billions of containers per week for a lot of years. This is massive scale and they needed help. So, they built a couple of in-house tools called Borg and Omega to help. The rest of the world encountered similar challenges when Docker made containers popular. Even though we weren’t doing things at the same scale as Google, we still needed tools to help. At around the same time that Docker made containers popular, a group of technologists at Google were building a new container orchestration tool. It was based on lessons learned from Borg and Omega, and in 2014 they released it as an open-source project called “Kubernetes”.

So, Kubernetes is a platform for scheduling and managing containers at scale. It brings features such as self-healing, autoscaling, and zero-downtime rolling updates. It was originally built inside of Google and released the community as an open-source project in 2014. Since then, it’s become...