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

Exam essentials

Container runtimes
Container runtimes are a class of infrastructure application that specialises in low-level container operations such as creating, starting, stopping, and deleting containers. They tend to operate in the background and are managed by higher-level tools like Kubernetes. For example, you or your team might deploy applications to Kubernetes on a daily basis. However, you won’t run the commands to actually start and stop containers – Kubernetes looks after all of that for you behind the scenes. Docker is the best-known container runtime, but others include containerd and CRI-O.
Containerisation
Containerisation is the process of building an application and its dependencies into a container image. For example, when a developer has written an application and packaged it as a container image you can say the developer has “containerised the app”.
The Open Containers Initiative (OCI)
The OCI is an open organisation...