[ovirt-users] Proper way to change and persist vdsm configuration options

I'm running ovirt nodes that are stock CentOS 6.5 systems with VDSM installed. I am using iSER to do iSCSI over RDMA and to make that work I have to modify /etc/vdsm/vdsm.conf to include the following: [irs] iscsi_default_ifaces = iser,default I've noticed that any time I upgrade a node from the engine web interface that changes to vdsm.conf are wiped out. I don't know if this is being done by the configuration code or by the vdsm package. Is there a more reliable way to ensure changes to vdsm.conf are NOT removed automatically? Thanks, - Trey