# StatefulSet PODs Not Getting Deleted After Helm Upgrade

## Problem

* After helm upgrade the statefulset gets upgraded but POD were not re-created

## Environment

* Platform9 Managed Kubernetes -- All version

## Cause

* Statefuset `updateStrategy` is set to "`OnDelete"`
* The Statefulset 'upgradeStrategy' field is set to type 'OnDelete'

{% tabs %}
{% tab title="Bash" %}

```bash
updateStrategy:
    type: OnDelete
  volumeClaimTemplates:
  - apiVersion: v1
    kind: PersistentVolumeClaim
    metadata:
      creationTimestamp: null
      name: imcdiamstorage
```

{% endtab %}
{% endtabs %}

## Resolution

* There are two ways to overcome this issue

1. Delete the statefulset's POD's manually after helm upgrade
2. Set the 'upgradeStrategy' field to type 'RollingUpgrade'

## Additional Information

* Check [Kubernetes Documentation for StatefulSet](https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/) Upgrade Strategy


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