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

Chapter summary

In this chapter, you learned the basics of containers and how they’re like smaller faster virtual machines that are better suited for microservices applications. Container runtimes are low-level applications that start and stop containers and are usually managed by higher-level applications like Kubernetes. Kubernetes orchestrates containerised applications, which is jargon for providing features such as scheduling, self-healing, and autoscaling.

You also learned that containers and microservices design patterns introduce new security threats such as shared kernels, root containers, unsecured networks, and untrusted code. Containers also provide new and unique challenges for network services such as IP address management and service discovery. They also have an impact on overall network security. Kubernetes provides native IPAM and service discovery, but you need a service mesh for container-to-container encryption and deep visibility into network traffic flow...