[...]
apiVersion: dataplane.openstack.org/v1beta1
kind: OpenStackDataPlaneNodeSet
metadata:
  name: openstack-edpm-ipam
spec:
  preProvisioned: True
  ...
  nodeTemplate:
          edpm_podman_buildah_login: true          
          edpm_container_registry_logins:          
            registry.redhat.io:            
              testuser: testpassword
[...] 

apiVersion: dataplane.openstack.org/v1beta1
kind: OpenStackDataPlaneNodeSet
metadata:
  name: openstack-edpm-ipam
spec:
  preProvisioned: True
  ...
  nodeTemplate:
    ansible:
      ...
      ansibleVars:
        edpm_bootstrap_command: |
          subscription-manager register --username <subscription_manager_username> --password <subscription_manager_password>
          subscription-manager release --set=9.2
          subscription-manager repos --disable=*
          subscription-manager repos --enable=rhel-9-for-x86_64-baseos-eus-rpms --enable=rhel-9-for-x86_64-appstream-eus-rpms --enable=rhel-9-for-x86_64-highavailability-eus-rpms --enable=openstack-17.1-for-rhel-9-x86_64-rpms --enable=fast-datapath-for-rhel-9-x86_64-rpms --enable=openstack-dev-preview-for-rhel-9-x86_64-rpms
          podman login -u <registry_username> -p <registry_password> registry.redhat.io