# Helm

## Repository Management
COMMAND | DESCRIPTION
---|---
`helm repo list` | List Helm repositories
`helm repo update` | Update list of Helm charts from repositories

## Chart Management
COMMAND | DESCRIPTION
---|---
`helm search` | List all installed charts
`helm search <CHARTNAME>` | Search for a chart
`helm ls` | List all installed Helm charts
`helm ls --deleted` | List all deleted Helm charts
`helm ls --all` | List installed and deleted Helm charts
`helm inspect values <REPO>/<CHART>` | Inspect the variables in a chart

## Install/Delete Helm Charts
COMMAND | DESCRIPTION
---|---
`helm install --name <NAME> <REPO>/<CHART>` | Install a Helm chart
`helm install --name <NAME> --values <VALUES.YML> <REPO>/<CHART>` | Install a Helm chart and override variables
`helm status <NAME>` | Show status of Helm chart being installed
`helm delete --purge <NAME>` | Delete a Helm chart

## Upgrading Helm Charts
COMMAND | DESCRIPTION
---|---
`helm get values <NAME>` | Return the variables for a release
`helm upgrade --values <VALUES.YML> <NAME> <REPO>/<CHART>` | Upgrade the chart or variables in a release
`helm history <NAME>` | List release numbers
`helm rollback <NAME> 1` | Rollback to a previous release number

## Creating Helm Charts
COMMAND | DESCRIPTION
---|---
`helm create <NAME>` | Create a blank chart
`helm lint <NAME>` | Lint the chart
`helm package <NAME>` | Package the chart into foo.tgz
`helm dependency update` | Install chart dependencies

## Chart Folder Structure
```
wordpress/
  Chart.yaml          # A YAML file containing information about the chart
  LICENSE             # OPTIONAL: A plain text file containing the license for the chart
  README.md           # OPTIONAL: A human-readable README file
  requirements.yaml   # OPTIONAL: A YAML file listing dependencies for the chart
  values.yaml         # The default configuration values for this chart
  charts/             # A directory containing any charts upon which this chart depends.
  templates/          # A directory of templates that, when combined with values,
                      # will generate valid Kubernetes manifest files.
  templates/NOTES.txt # OPTIONAL: A plain text file containing short usage notes
```