Volume name template

Hi jovyans on k8s,

I have tried setting a value for singleuser.storage.dynamic.volumeNameTemplate as described in the configuration reference. However the names of the dynamically created volumes are not following the template.

Here is a snippet from my config.yaml:

singleuser:
  storage:
      capacity: 5Gi
      dynamic:
        storageClass: jupyterhub-user-ssd
        volumeNameTemplate: volume-{username}

Is the config flawed?