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Version: v1.4

Installing Helm Charts

Overview​

This guide demonstrates how to install Helm charts via the Nova Control Plane using an actual example—installing the nginx chart from Bitnami. Note that this is merely an example. In a real-world setup, you would customize the SchedulePolicy, chart, and values according to your specific requirements.

Steps to Install Helm Charts​

1. Define Your SchedulePolicy​

Create a SchedulePolicy YAML file tailored to your workload clusters and namespaces. For this example, we'll use a cluster named workload-1 and the default namespace.

apiVersion: policy.elotl.co/v1alpha1
kind: SchedulePolicy
metadata:
  name: example-helm-policy
spec:
  namespaceSelector:
    matchLabels:
      kubernetes.io/metadata.name: default
  clusterSelector:
    matchLabels:
      kubernetes.io/metadata.name: workload-1
  resourceSelectors:
    labelSelectors:
    - matchLabels:
        nova.elotl.co/policy: example-helm-policy

Apply this policy:

kubectl apply -f example-helm-policy.yaml

2. Prepare to Install the nginx Chart​

For our example, we're using the nginx chart from Bitnami, which can be installed from oci://registry-1.docker.io/bitnamicharts/nginx.

3. Add Labels to Your Chart Resources​

The Bitnami nginx chart allows you to add custom labels to the resources it installs via the commonLabels map in the values.yaml file. Add your SchedulePolicy label like so:

commonLabels:
  nova.elotl.co/policy: example-helm-policy

4. Install Your Helm Chart​

Install the nginx chart using the custom values. For this example:

helm install nginx oci://registry-1.docker.io/bitnamicharts/nginx -f my-values.yaml

In case you don't want to edit the values.yaml file, you can directly add the label using the --set flag:

helm install nginx oci://registry-1.docker.io/bitnamicharts/nginx --set commonLabels."nova\.elotl\.co/policy"=example-helm-policy

5. You're up and running!​

kubectl get deploy
NAME    READY   UP-TO-DATE   AVAILABLE   AGE
nginx   1/1     1            1           2m8s

Reminder: Customize According to Your Needs​

This guide uses the Bitnami nginx chart and a workload-1 cluster merely as examples. In your production environment, you'll need to customize the SchedulePolicy, Helm chart, and values to fit your unique requirements.