Fix to the issue preventing the attachement of volume to k3s nodes (https://github.com/rancher/k3s/issues/732#issuecomment-526036948)

k3s-0.8-volumeattachements-fix.yaml

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: system:nodes:volumeattachments
rules:
- apiGroups:
  - storage.k8s.io
  resources:
  - volumeattachments
  verbs:
  - create
  - watch
  - get
  - list
  - patch
  - update
  - delete
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:nodes:volumeattachments
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:nodes:volumeattachments
subjects:
- apiGroup: rbac.authorization.k8s.io
  kind: Group
  name: system:nodes