@olivierlambert here is the replica node, on a 10km distant datacenter (two ways 10Gb network between the two nodes)

smaller setup here, just to host backup copies of production node and replica/DR VMs.
the whole setup consist of 7 VMS Enterprise hosts

Netgate 8300 max firewalls top of rack.
we are a MSP (and Vates partner
Tier2 soon to be Tier4 !) providing full hosting or hybrid onprem/oncloud to our clients.
some other services like web hosting with Plesk platform, Veeam Cloud Connect, security/firewalling services, centralised monitoring with Centreon and as soon as we manage to connect onprem XCP to our cloud xoproxies, full replica solution of onprem XCP servers.
on the bare metal, XCP 8.3, value added with full automation of tenant creation/administration/documentation with diverse APIs (check CRM for clients tagged to be admin of their tenant, get VLANs from there, create them in XCP pools/switchs/pfsense firewalls, create firewall rules and limiters, create openvpn server, spin up VMs in client tenant, automatic netbox documentation on top of xoa plugin, enjoy !)
we are on pre-production and should be on the market in november, currently migrating OVH VMs to these servers.
VATES stack is the best solution to be fully integrated in our vision of providing VMs and services to clients in an efficient way.
we left vmware, had ESXs hosted in OVH datacenters in France, but they were 10 000km and 250ms away from our end users.
for those who wonder, we are located at Reunion Island, indian ocean, french overseas territory.