Book Image

kubectl: Command-Line Kubernetes in a Nutshell

By : Rimantas Mocevicius
Book Image

kubectl: Command-Line Kubernetes in a Nutshell

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)
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

Deleting an application

Sometimes, you need to delete an application, so let's go over a few options for how to do that.

In the previous sections, we deployed the deployment and service. Let's refresh our memory on what we deployed.

To check the deployments, run the following command:

$ kubectl get deployment
NAME    READY   UP-TO-DATE   AVAILABLE   AGE
nginx   3/3     3            3           6d17h

To check the active services, run the following command:

$ kubectl get service
NAME         TYPE         CLUSTER-IP    EXTERNAL-IP     PORT(S)
kubernetes   ClusterIP    10.16.0.1...