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

Deploying and managing applications

The following sections of this chapter will take you through practical exercises with concrete examples that you would encounter in your real CKA exam, including how to deploy and scale applications, perform rolling updates and rollbacks for those applications, manage and govern the resource consumption for these applications, and configure them.

Deploying applications

Deploying applications can be achieved in various ways, such as deploying a pod with kubectl or a YAML definition, as we did in the The basics of Kubernetes workloads section of this chapter. Now, we’ll take a look at a more effective way of using Deployments. In this section, let’s get into how to deploy and scale applications.

Deployments

A Deployment is a convenient way to define the desired state deployment – it provides us with a better way of upgrading the underlying instances seamlessly using rolling updates, undoing changes, and pausing and...