LINBIT recently released their new solution for orchestrating and managing multiple DRBD arrays.
For example, you can have several nodes and each will have its own LVM or ZFS pool in which LINSTOR will automatically create new volumes and replicate them between nodes using the DRBD protocol.
LINSTOR supports thin-provisioning, snapshots and many other interesting things.
This solution is well suited for virtual machines and containers.
I believe that you already have a Proxmox cluster, I have three nodes