Book Image

The Complete Kubernetes Guide

By : Jonathan Baier, Gigi Sayfan, Jesse White
Book Image

The Complete Kubernetes Guide

By: Jonathan Baier, Gigi Sayfan, Jesse White

Overview of this book

If you are running a number of containers and want to be able to automate the way they’re managed, it can be helpful to have Kubernetes at your disposal. This Learning Path guides you through core Kubernetes constructs, such as pods, services, replica sets, replication controllers, and labels. You'll get started by learning how to integrate your build pipeline and deployments in a Kubernetes cluster. As you cover more chapters in the Learning Path, you'll get up to speed with orchestrating updates behind the scenes, avoiding downtime on your cluster, and dealing with underlying cloud provider instability in your cluster. With the help of real-world use cases, you'll also explore options for network configuration, and understand how to set up, operate, and troubleshoot various Kubernetes networking plugins. In addition to this, you'll gain insights into custom resource development and utilization in automation and maintenance workflows. By the end of this Learning Path, you'll have the expertise you need to progress from an intermediate to an advanced level of understanding Kubernetes. This Learning Path includes content from the following Packt products: • Getting Started with Kubernetes - Third Edition by Jonathan Baier and Jesse White • Mastering Kubernetes - Second Edition by Gigi Sayfan
Table of Contents (26 chapters)
Title Page
Copyright and Credits
About Packt
Contributors
Preface
Index

Creating your own charts


A chart is a collection of files that describe a related set of Kubernetes resources. A single chart might be used to deploy something simple, such as a memcached pod, or something complex, such as a full web app stack with HTTP servers, databases, and caches.

Charts are created as files laid out in a particular directory tree. Then, they can be packaged into versioned archives to be deployed. The key file is Chart.yaml.

The Chart.yaml file

The Chart.yaml file is the main file of a Helm chart. It requires a name and version fields:

  • name: The name of the chart (same as the directory name)
  • version: A SemVer 2 version

It may also contain various optional fields:

  • kubeVersion: A SemVer range of compatible Kubernetes versions
  • description: A single-sentence description of this project
  • keywords: A list of keywords about this project
  • home: The URL of this project's home page
  • sources: A list of URLs to source code for this project
  • maintainers:
    • name: The maintainer's name (required for...