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

Service meshes

Service meshes automatically add network security, observability, and reliability to cloud native applications and are important for large-scale production environments.

A key aspect of service meshes is the ability to add these features automatically. They do this by implementing them at the platform layer instead of the application layer. This is jargon that means you just install the service mesh and every application that runs on it “just gets the features”. It’s a powerful model that means developers and individual applications don’t need to even think about these services.

Consider a large microservices application that needs to encrypt traffic. Without a service mesh you’d need to code every microservice with the intelligence and certificates to encrypt and decrypt traffic. This adds complexity to every microservice and distracts developers from developing features that benefit customers and the business. The alternative is a...