airshipctl/manifests/site/openstack-test-site/ephemeral/controlplane/control_plane_machine_flavor_patch.yaml

apiVersion: infrastructure.cluster.x-k8s.io/v1alpha4
kind: OpenStackMachineTemplate
metadata:
  name: target-cluster-control-plane
  namespace: default
spec:
  template:
    spec:
      flavor: ds4G