Kubernetes Persistent Volumes with DigitalOcean?

Is it possible to configure a kubernetes_persistent_volume using DigitalOcean volumes with Terraform? I can do it with a YAML file for kubectl. eg:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  labels:
    app: myapp
  name: myapp-config-pvc
spec:
  accessModes:
  - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi
  storageClassName: do-block-storage

but when I try to do the same with Terraform, it wants a persistent_volume_source. Offering an empty persistence_volume_source will pass a terraform plan, but when I try to apply, it complains. “Error: PersistentVolume “myapp-config-pv” is invalid: spec: Required value: must specify a volume type”

resource "kubernetes_persistent_volume" "myapp-config-pv" {
  metadata {
    name = "myapp-config-pv"
  }
  spec {
    access_modes = ["ReadWriteOnce"]
    storage_class_name = "do-block-storage"
    persistent_volume_source { }
    capacity = {
      storage = "1Gi"
    }
  }
}

I don’t really know where to go from here. None of the arguments in the TF docs ( https://www.terraform.io/docs/providers/kubernetes/r/persistent_volume.html#persistent_volume_source-1 ) seem relevant. What am I missing?

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