OVH ip-failover configuration via WebUI

Good evening,

First of all, many thx for the great work on OMV. It silently runs at home for years. Never had any issues with it !

I am now installing OMV3 from official ISO in a VM (KVM) on a dedicated OVH.server. I have some doubt about the network configuration : I have no problem to manually configure my eth0 by editing /etc/network/interfaces file. Unfortunately, my config is not visible in the WebUI and I failed to add the same parameters via the WebUI.

If I keep it like this, can I be 100% sure it will never be overwritten by any OMV script (and leave my server unreachable) ? I already had to re-install it after configuring a static eth1 (no gw) via WebUI.
Is there any way to deal with this kind of configuration in WebUI ?

iface eth0 inet static
    address IP.FAIL.OVER
    netmask 255.255.255.255
    broadcast IP.FAIL.OVER
    post-up route add GATEWAY_VM dev eth0
    post-up route add default gw GATEWAY_VM
    pre-down route del GATEWAY_VM dev eth0
    pre-down route del default gw GATEWAY_VM

Any suggestions are welcome.

Just sending the first post, I saw the pinned thread "Customize /etc/network/interfaces the OMV way".
I guess this is what I was looking for.