cri-o/vendor/k8s.io/kubernetes/cluster/openstack-heat/kubernetes-heat/fragments/hostname-hack.yaml

#cloud-config
merge_how: dict(recurse_array)+list(append)

write_files:
  - path: /etc/cloud/cloud.cfg.d/99_hostname.cfg
    owner: "root:root"
    permissions: "0644"
    content: |
      preserve_hostname: true