Helm

The package manager for Kubernetes — versioned, templated chart releases.

Repositories

helm repo add bitnami https://charts.bitnami.com/bitnami

Add a chart repo.

```
helm repo update
```
Fetch the latest index from every added repo. Run before install/upgrade.
```
helm repo list
```
Show added repos + URLs.
```
helm search repo nginx
```
Search every added repo for a chart.
```
helm search hub nginx
```
Search Artifact Hub (the public registry of public charts).

Install, upgrade & rollback

```
helm install my-app bitnami/nginx
```
Install a chart with release name `my-app`.
```
helm upgrade --install my-app bitnami/nginx -f values.yaml
```
The idempotent way: install if missing, upgrade if present. Use this in CI.

helm upgrade my-app bitnami/nginx --set image.tag=1.27

Override a value on the command line.

```
helm rollback my-app 1
```
Roll back to revision 1.
```
helm uninstall my-app
```
Remove a release. --keep-history to keep revision metadata.

Inspect releases

```
helm list
```
List releases in the current namespace. -A across all namespaces.
```
helm status my-app
```
Status, last-deployed, notes for a release.
```
helm history my-app
```
Revision history for a release.
```
helm get values my-app
```
Values that were merged in for the active revision. -a for all (incl. defaults).
```
helm get manifest my-app
```
The full rendered manifest k8s actually received.

Chart authoring

```
helm create my-chart
```
Scaffold a new chart with sensible defaults.
```
helm template my-chart
```
Render the chart to stdout without talking to k8s — fast feedback loop while editing templates.
```
helm lint my-chart
```
Catch common mistakes before install.
```
helm package my-chart
```
Bundle a chart into a versioned tgz.
```
helm dependency update my-chart
```
Pull subcharts declared in Chart.yaml's dependencies.