kubernetes/cluster/addons/storage-class/gce/default.yaml

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: standard
  annotations:
    storageclass.kubernetes.io/is-default-class: "true"
  labels:
    addonmanager.kubernetes.io/mode: EnsureExists
provisioner: kubernetes.io/gce-pd
parameters:
  type: pd-standard
allowVolumeExpansion: true