Using the 'required' Function

In this task, you will learn how to use the 'required' function.

INGRESS_IP environment variable is supposed to be set during the setup. You can always set it this way:

export INGRESS_IP=$(kubectl get svc ingress-nginx-controller -n ingress-nginx -o jsonpath='{.status.loadBalancer.ingress[].ip}')

Inspect the Helm Chart

cd /workspaces/helm/09_required
tree .

Adapt the Deployment to the following

Edit ./my-chart/templates/deployment.yaml file:

---
containers:
  - name: my-nginx
    image: nginx:{{ required "A nginx version is required!" .Values.tag }}

Release the application

Note that you will get an error message.

helm install required ./my-chart

Try again with the tag provided.

helm install required ./my-chart --set tag=1.19.2

Wait until the pods are ready

kubectl wait pod -l app.kubernetes.io/instance=required --for=condition=ready --timeout=120s

Access the endpoint via

curl ${INGRESS_IP}

If you want to reach it via browser, you first need to port-forward ingress-nginx-controller service:

kubectl port-forward svc/ingress-nginx-controller -n ingress-nginx 80

Then, reach via below URLs:

echo "https://${CODESPACE_NAME}-80.app.github.dev/"

Cleanup

# delete the resources
helm uninstall required