Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying kubectl: Command-Line Kubernetes in a Nutshell
  • Table Of Contents Toc
  • Feedback & Rating feedback
kubectl: Command-Line Kubernetes in a Nutshell

kubectl: Command-Line Kubernetes in a Nutshell

By : Rimantas Mocevicius
4.4 (7)
close
close
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)
close
close
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

Describing nodes

The kubectl describe command allows us to get the state, metadata, and events of an object in a Kubernetes cluster. In this section, we will use it to describe the node.

We have got a list of nodes, so let's check out one of them:

  1. To describe a node, run the following command:
    $ kubectl describe node gke-kubectl-lab-default-pool-b3c7050d-6s1l

    As the command's output is quite big, we are going to show only some parts of it. You can check out the full output yourself.

  2. In the following screenshot, we see the assigned Labels (which can be used to organize and select subsets of objects) and Annotations (extra information about the node is stored there) for the node, and Unschedulable: false means that the node accepts pods to be scheduled on to it. For example, Labels can be used for Node Affinity (which allows us to constrain which nodes the pod is eligible to be scheduled on, based on the labels on the node) to schedule pods on particular nodes...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY