wpernath / helm-demo

This is a quick demo about how to use Helm with OpenShift 4

HELM v3 Demo for OpenShift 4

This is a quick demo about how to use Helm with OpenShift 4. It is based on the following article in opensource.com.

Prepare your environment

Setup your OpenShift cluster (usecode-ready/crc), login into it with the user developer and create a new project

$> crc setup && crc start
$> oc login -u developer -p developer https://api.crc.testing:6443/
$> oc new-project helm-demo

Setup helm on Mac

If you want to play locally, you have to setup helm. Either download it from the official website or install it via homebrew.

$> brew install helm

Other OS'ses

Just read here: https://helm.sh

Demo

A simple demo guide

Explain local files

$ tree
.
├── Chart.yaml
├── README.md
├── charts
├── templates
│   ├── NOTES.txt
│   ├── _helpers.tpl
│   ├── configMap.yaml
│   ├── deployment.yaml
│   ├── hpa.yaml
│   ├── ingress.yaml
│   ├── route.yaml
│   ├── service.yaml
│   ├── serviceaccount.yaml
│   └── tests
│       └── test-connection.yaml
└── values.yaml

3 directories, 13 files

Install the chart

$> helm install my-app-chart ./helm-demo --values ./helm-demo/values.yaml

Make a simple update

Don’t forget to update Chart.yaml versions and then

$> helm upgrade my-app-chart ./helm-demo --values ./helm-demo/values.yaml