Basic Helm Commands

List helm chart local repo:

helm repo list

Add helm chart repo:

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

Remove helm chart repo:

helm repo remove bitnami

Update helm repo:

helm repo update

Search for charts from repo:

helm search repo apache

Install a release:

helm install devdb bitnami/mysql

Install a release in a namespace:

helm install devdb bitnami/mysql --namespace dev-namespace --create-namespace

Install a release with generated name:

helm install bitnami/mysql --generate-name

Install a release with generated name with template:

helm install bitnami/mysql --generate-name --name-template="devdbserver-\{\{randAlpha 7 | lower\}\}"

List installed releases:

helm list --namespace dev-namespace

Uninstall a release and history:

helm uninstall --namespace dev-namespace devdb

Uninstall a release but keep history (kept in kubernetes secret):

helm uninstall devdb --keep-history

Check status of a release:

helm status devdb

Upgrade a release:

helm upgrade --namespace dev-namespace devdb bitnami/mysql --set auth.rootPassword=$ROOT_PASSWORD

Upgrade a release with custom values:

helm upgrade --namespace dev-namespace devdb bitnami/mysql --values=values.yaml

Upgrade a release, if not exist, create one:

helm upgrade --install --namespace dev-namespace devdb bitnami/mysql

The dry-run option:

This option is similar to the dry-run option in kubectl. It will generate two parts: template & notes. Helm will connect to Kubernetes server to validate the template.

helm install testdb bitnami/mysql --dry-run

Get template from a release:

helm template devdb bitnami/mysql

Retrieve the note of a release:

helm get notes devdb

Get customed values from a release:

helm get values devdb

Get customed values from a revision of a release:

helm get values devdb --revision 2

Get all values provided in a release:

helm get values devdb --all

Get the manifest:

This will generate manifest so we can save in yaml files and then kubectl apply -f yaml files

helm get manifest devdb

List revision history:

List the deployed revisions and the failed ones

helm history devdb

Rollback to a history revision:

helm rollback devdb 1