Las imágenes que están armadas en los headnodes se pueden encontrar en el directorio /var/lib/confluent/public/os/:

$ ls /var/lib/confluent/public/os
dssg-standard-4.5a  genesis-x86_64  rhel-8.6-x86_64-default  rhel-8.8-x86_64-diskless-cpu  rhel-8.8-x86_64-diskless-gpu

Con nodeattrib se puede ver cuál imagen usa cada nodo:

# nodeattrib snmgt01 | grep deployment.profile
snmgt01: deployment.profile: rhel-8.6-x86_64-default

También tiene otros atributos, deployment.pendingprofile y deployment.stagingprofile. La documentación dice:

       deployment.pendingprofile
              An OS profile that is pending deployment. This indicates to the network boot subsystem what should be offered when a potential network boot request comes in

       deployment.profile
              The  profile that has most recently reported completion of deployment. Note that an image may opt to leave itself both current and pending, for example a stateless profile
              would be both after first boot.
       (...)
       deployment.stagedprofile
              A  profile  that  has been staged, but is awaiting final boot to be activated. This allows an OS profile to remove itself from netboot without indicating completion to any
              watcher.

Esto seguramente sea relevante para el deployment de imágenes nuevas.