What Helm is

Helm is a package manager for Kubernetes. It allows to install and configure applications and other resources in Kubernetes cluster.

Chart

Chart is a Helm package. Chart has all you need to run your application in a Kubernetes cluster. Each chart has a version.

Release

Release is a Chart which is running in a Kubernetes cluster.

Release number

When chart is first deployed it has release number 1. Each upgrade or rollback increases release number.

Repository

Repository is a place where charts are being stored and shared.

Rollback

Release can be rolled back to the previous (or specific) version number.

Values

Values file is a file which puts its configuration values to appropriate places in templates overriding default values.