post_upgrade() {
  echo ">>> For instructions on how to upgrade from ark to velero see:"
  echo ">>> https://heptio.github.io/velero/v0.11.0/migrating-to-velero"
  echo ">>> For instructions on how to upgrade to velero >= 1.0 see:"
  echo ">>> https://heptio.github.io/velero/master/upgrade-to-1.0"
}