Two final steps I've done that are only necessary in my environment, where the host itslef is providing the NFS service for storage domains:

After install you have to make a dependency so that VDSM Broker starts after NFS Server

In /usr/lib/systemd/system/ovirt-ha-broker.service

Added in section  [Unit] the line:

After=nfs-server.service

Also, for vdsmd service, in file vdsmd.service changed from:

After=multipathd.service libvirtd.service iscsid.service rpcbind.service \
      supervdsmd.service sanlock.service vdsm-network.service 

to:
After=multipathd.service libvirtd.service iscsid.service rpcbind.service \
      supervdsmd.service sanlock.service vdsm-network.service \
      nfs-server.service

NOTE: the files will be overwritten by future updates, so you have to keep in mind...