sample helm chart creation and running install and upgrade

To create a chart:

helm create first-chart

To make it simple, lets delete the contents of templates folder and just create a configmap (configmap.yaml).

apiVersion: v1

kind: ConfigMap

metadata:

  name: first-chart-configmap

data:

  port: "8080"

Once created, can install it using:

helm install first-chart .

Let's modify the above configmap.yaml file and add one more data entry.

apiVersion: v1

kind: ConfigMap

metadata:

  name: first-chart-configmap

data:

  port: "8080"

  allowTesting: "true"

To see what are the changes added, run below.

helm template first-chart .

To apply the modifications:

helm upgrade first-chart .