[ovirt-users] oVirt Node install - kickstart postintall

Hello everybody, Since days, I'm trying to install oVirt (via Foreman) in network mode (TFTP net install). All is great, but I want to make some actions in postinstall (%post). Some actions are relatated to /etc/sysconfig/network-interfaces and another action is related to root authorized_keys. When I try to add pub-key to a created authorized_keys for root, I work (verified into anaconda. But after installation and anaconda reboot, I've noticed all my %post actions in /(root) are discared. After reboot, there is nothing in /root/.ssh for example. Whereas, in /etc, all my modications are preserved. I thought to a Selinux relative issue, but It is not relative to Selinux I miss something. Please can you help to understand how oVirt install / partition work ? thanks for all