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kubectl: Command-Line Kubernetes in a Nutshell

kubectl: Command-Line Kubernetes in a Nutshell

By : Rimantas Mocevicius
4.4 (7)
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kubectl: Command-Line Kubernetes in a Nutshell

kubectl: Command-Line Kubernetes in a Nutshell

4.4 (7)
By: Rimantas Mocevicius

Overview of this book

The kubectl command line tool lets you control Kubernetes clusters to manage nodes in the cluster and perform all types of Kubernetes operations. This introductory guide will get you up to speed with kubectl in no time. The book is divided into four parts, touching base on the installation and providing a general overview of kubectl in the first part. The second part introduces you to managing Kubernetes clusters and working with nodes. In the third part, you’ll be taken through the different ways in which you can manage Kubernetes applications, covering how to create, update, delete, view, and debug applications. The last part of the book focuses on various Kubernetes plugins and commands. You’ll get to grips with using Kustomize and discover Helm, a Kubernetes package manager. In addition to this, you’ll explore how you can use equivalent Docker commands in kubectl. By the end of this book, you’ll have learned how to install and update an application on Kubernetes, view its logs, and inspect clusters effectively.
Table of Contents (16 chapters)
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1
Section 1: Getting Started with kubectl
3
Section 2: Kubernetes Cluster and Node Management
6
Section 3: Application Management
10
Section 4: Extending kubectl

Cluster API versions

It is good practice to check the available cluster API versions because each new Kubernetes version usually brings with it new API versions and deprecates/removes some old ones.

To get an API list, run the following command:

$ kubectl api-versions

The output for the preceding command gives us a list of APIs, as shown in the following screenshot:

Figure 2.2 – API list

Figure 2.2 – API list

You need to know which APIs can be used in your application, as otherwise, the deployment could fail if the API version you use is not supported anymore.

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