Manage Kubernetes applications using kubectl and discover the different Kubernetes clusters
Key Features
* Explore the Kubernetes command line for deploying applications, inspecting clusters, and viewing logs
* Leverage kubectl for Kubernetes application management and container debugging
* Apply your knowledge of Docker to learn kubectl equivalent commands for Docker subcommands
Book Description
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.
What you will learn
* Get to grips with the basic kubectl commands
* Delve into different cluster nodes and their resource usages
* Understand the most essential features of kubectl
* Discover how to patch Kubernetes deployments with Kustomize
* Find out ways to develop and extend kubectl tools with their own plugins
* Explore how to use Helm as an advanced tool for deploying apps
Who this book is for
This book is for developers, system administrators, and anyone who wants to use the kubectl command-line tool to perform Kubernetes functionalities. A basic understanding of Kubernetes and Docker is required to get started with this book.
Author(s): Rimantas Mocevicius
Publisher: Packt Publishing Ltd.
Year: 2020
Language: English
Pages: 136
Cover
Title Page
Copyright and Credits
About Packt
Contributors
Table of Contents
Preface
Section 1: Getting Started with kubectl
Chapter 1: Introducing and Installing kubectl
Technical requirements
Introducing kubectl
Installing kubectl
Installing on macOS
Installing on Windows
Installing on Linux
kubectl commands
Basic commands
Deploy commands
Cluster management commands
Troubleshooting and debugging commands
Advanced commands
Settings commands
Other commands
Summary
Section 2: Kubernetes Cluster and Node Management
Chapter 2: Getting Information about a Cluster
Cluster information
Cluster API versions
Cluster resources list
Summary
Chapter 3: Working with Nodes
Getting a list of nodes
Describing nodes
Displaying node resource usage
Cordoning nodes
Draining nodes
Removing nodes
Introduction to node pools
Summary
Section 3: Application Management
Chapter 4: Creating and Deploying Applications
Introduction to pods
Creating a deployment
Creating a service
Scaling up an application
Summary
Chapter 5: Updating and Deleting Applications
Deploying a new application version
Rolling back an application release
Assigning an application to a specific node (node affinity)
Scheduling application replicas to different nodes (pod affinity)
Exposing an application to the internet
Deleting an application
Summary
Chapter 6: Debugging an Application
Describing a pod
Checking pod logs
Executing a command in a running container
Summary
Section 4: Extending kubectl
Chapter 7: Working with kubectl Plugins
Installing plugins
Using plugins
Creating a basic plugin
Summary
Chapter 8: Introducing Kustomize for Kubernetes
Introduction to Kustomize
Patching a Kubernetes application
Kustomize overlays
Summary
Chapter 9: Introducing Helm for Kubernetes
Introduction to Helm
The Helm CLI
Helm charts
Chart templating
Repositories
Releases
Installing applications using Helm charts
Upgrading Helm releases
Rolling back to a previous Helm release
Using Helm's template command
Creating a Helm chart
Using Helm's linting feature
Extending Helm with plugins
Summary
Chapter 10: kubectl Best Practices and Docker Commands
Using shell aliases for kubectl commands
Similar Docker commands in kubectl
Summary
Other Books You May Enjoy
Index
