Book Image

Certified Kubernetes Administrator (CKA) Exam Guide

By : Mélony Qin
4 (1)
Book Image

Certified Kubernetes Administrator (CKA) Exam Guide

4 (1)
By: Mélony Qin

Overview of this book

Kubernetes is the most popular container orchestration tool in the industry. The Kubernetes Administrator certification will help you establish your credibility and enable you to efficiently support the business growth of individual organizations with the help of this open source platform. The book begins by introducing you to Kubernetes architecture and the core concepts of Kubernetes. You'll then get to grips with the main Kubernetes API primitives, before diving into cluster installation, configuration, and management. Moving ahead, you’ll explore different approaches while maintaining the Kubernetes cluster, perform upgrades for the Kubernetes cluster, as well as backup and restore etcd. As you advance, you'll deploy and manage workloads on Kubernetes and work with storage for Kubernetes stateful workloads with the help of practical scenarios. You'll also delve into managing the security of Kubernetes applications and understand how different components in Kubernetes communicate with each other and with other applications. The concluding chapters will show you how to troubleshoot cluster- and application-level logging and monitoring, cluster components, and applications in Kubernetes. By the end of this Kubernetes book, you'll be fully prepared to pass the CKA exam and gain practical knowledge that can be applied in your day-to-day work.
Table of Contents (17 chapters)
1
Part 1: Cluster Architecture, Installation, and Configuration
5
Part 2: Managing Kubernetes
10
Part 3: Troubleshooting

Kubernetes volumes

Ephemeral volumes and persistent volumes are two main types of volumes in Kubernetes. We’ll take a look at each of them. Some of them may not be covered in the CKA exam, but it is important to know, as whichever organization you work in will have embarked on its journey with one of those public cloud providers.

Ephemeral storage

Ephemeral volumes targeted to the application need to hold the data, but they don’t care about data loss in the case that the pod fails or restarts – the lifecycle of the ephemeral volume is aligned with the pod lifecycle. With that in mind, mounted storage is usually ephemeral, as it shares the same lifecycle as your containers. As long as the container is stopped or destroyed during the process of restarting the pod, any internal storage is completely removed.

Another use case is when a pod contains multiple containers. It is possible to mount that storage to the containers and allow those containers to share...