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

Exam essentials

Telemetry is jargon for the monitoring-related outputs generated by a system. They include logs, metrics, and traces. High-quality telemetry is vital for troubleshooting, tweaking, and understanding the behaviour of cloud native apps.
The OpenTelemetry project is an incubating CNCF project that defines specifications and instrumentation aimed at making high-quality telemetry part of all cloud native apps.
Logs are a form of telemetry relating to application events and are one of the best places to look when things break. For example, application restarts, failed logins, dropped connections, and more will all be logged as events. Log data is often structured and formatted as JSON to make it easy to read and search. It’s also commonly categorised according to severity, with common severity levels including info, warning, error, and critical.
Metrics are usually performance related data captured over long...