Book Image

Becoming KCNA Certified

By : Dmitry Galkin
Book Image

Becoming KCNA Certified

By: Dmitry Galkin

Overview of this book

The job market related to the cloud and cloud-native technologies is both growing and becoming increasingly competitive, making certifications like KCNA a great way to stand out from the crowd and learn about the latest advancements in cloud technologies. Becoming KCNA Certified doesn't just give you the practical skills needed to deploy and connect applications in Kubernetes, but it also prepares you to pass the Kubernetes and Cloud Native Associate (KCNA) exam on your first attempt. The book starts by introducing you to cloud-native computing, containers, and Kubernetes through practical examples, allowing you to test the theory out for yourself. You'll learn how to configure and provide storage for your Kubernetes-managed applications and explore the principles of modern cloud-native architecture and application delivery, giving you a well-rounded view of the subject. Once you've been through the theoretical and practical aspects of the book, you'll get the chance to test what you’ve learnt with two mock exams, with explanations of the answers, so you'll be well-prepared to appear for the KCNA exam. By the end of this Kubernetes book, you'll have everything you need to pass the KCNA exam and forge a career in Kubernetes and cloud-native computing.
Table of Contents (22 chapters)
1
Part 1: The Cloud Era
4
Part 2: Performing Container Orchestration
7
Part 3: Learning Kubernetes Fundamentals
12
Part 4: Exploring Cloud Native
16
Part 5: KCNA Exam and Next Steps

Telemetry and observability

With the evolution of traditional monolithic architectures towards distributed loosely coupled microservice architectures, the need for detailed high-quality telemetry quickly became apparent. Before elaborating any further, let’s first define what Telemetry is in the context of IT infrastructure.

Telemetry

Refers to monitoring and collection of data about system performance for analysis that helps identify issues. Telemetry is a broad term for logs, metrics, and traces that are also known as telemetry types or signals.

With Cloud Native applications being distributed by design, the ability to track and trace all communication between the parts plays a major role for troubleshooting, finding bottlenecks and providing insights on how application performs.

All three telemetry signals (logs, metrics and traces) help us to better understand the state of the application and infrastructure at any given point of time and take a corrective action...