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

Primer

Cloud native applications are deployed as lots of small moving parts that connect over the network and are frequently updated and replaced. This makes it more important than ever to be able to see how applications are connected and have the ability to track requests as they traverse the various distributed microservices of an application.

To assist with this, every microservice needs to output high-quality telemetry in the form of metrics and log data. You then need the right tools to collect the telemetry, aggregate it, and analyse it for troubleshooting and making adjustments. The process is a feedback loop that looks like Figure 6.1 – observe > analyse > adjust.

Figure 6.1

Even though we’ve been doing things like this for years with traditional monolithic apps, all of the following are either new or far more important with cloud native apps.

  • Tracing requests
  • Application-specific metrics
  • Network latency
  • Scaling decisions
  • The...