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

Telemetry and observability

Telemetry is jargon for logs, metrics, and traces. This is observed by remote monitoring platforms that use it to learn how systems work, diagnose problems, and measure and optimise performance. A highly observable system is one that generates high-quality telemetry.

Consider the following quick example. You have an in-house cloud native application comprising lots of small microservices. You also have a centralised monitoring platform. Each microservice outputs telemetry that is collected, stored, and analysed by the monitoring platform.

As mentioned already, cloud native telemetry comes in three major flavours that we sometimes call signal types, verticals, or classes.

  • Logs
  • Metrics
  • Traces

Each serves a different purpose, but collectively they provide detailed insights that can be vital in understanding, troubleshooting, and optimising microservices applications.

The OpenTelemetry project is an incubating CNCF project that aims to standardise...