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)
8: Sample test
Appendix B: Sample Test answers

Open standards

Open standards are a big deal in cloud native. They help users avoid vendor lock-in and product lock-in, and they give developers confidence the products they build will work and integrate well with the wider ecosystem.

A common non-technical example is trains and train tracks. The majority of train tracks across the world are the same size and configuration (1,435 mm standard gauge). This means service providers can buy trains from one supplier today and switch to another supplier tomorrow with full confidence the trains from both suppliers will work on the same tracks. It also gives train manufacturers confidence the trains they build will work on tracks all over the world. The net result is confidence, and confidence enables progress.

The Open Containers Initiative (OCI) provides the following important standards in the cloud native ecosystem.

  • Image spec
  • Runtime spec
  • Distribution spec

The image-spec defines a standard way to build and package container images...