This page based on Charts for personal notes. If you want to learn more, please visit the official website.

Charts

Helm uses a packaging format called 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, like a memcached pod, or something complex, like a full web app stack with HTTP servers, databases, caches, and so on.

This page based on Using Helm for personal notes. If you want to learn more, please visit the official website.

Theree Big Concepts

A Chart is a Helm package. It contains all of the resource definitions necessary to run an application, tool, or service inside of a Kubernetes cluster. Think of it like the Kubernetes equivalent of a Homebrew formula, an Apt dpkg, or a Yum RPM file.

A Repository is the place where charts can be collected and shared. It’s like Perl’s CPAN archive or the Fedora Package Database, but for Kubernetes packages.

What is Helm?

Helm helps you manage Kubernetes applications — Helm Charts help you define, install, and upgrade even the most complex Kubernetes application.

Charts are easy to create, version, share, and publish — so start using Helm and stop the copy-and-paste.

The Purpose of Helm

Helm is a tool for managing Kubernetes packages called charts. Helm can do the following:

• Create new charts from scratch
• Package charts into chart archive (tgz) files
• Interact with chart repositories where charts are stored
• Install and uninstall charts into an existing Kubernetes cluster
• Manage the release cycle of charts that have been installed with Helm

For Helm, there are three important concepts: