Virtual SAN, proxmox and HA

Hello !

This week I came across a big issue and I still looking for a way to make it work.

I actually have a 6 nodes clustered proxmox. Nodes 1-4 are used for prod, preprod and backups. 5-6 are where my issue is.

I call them datastores, they are supposed to be used to give my VMs on 1-4 a network storage (used for a postgre database).

I need them to be HA/Synced so that in case of failure my VMs can still work.

I first used to setup OpenMediaVault with DRDB, creating an iscsi target and all. All is good exept I cannot setup the target on proxmox. Tried multiples solutions, played with network configuration but nothing is working.

Now im considering finding a new solution but everythink I find seems outdated (glusterFS, lizardFS), non-reliable (NFS or SMB), or not suitable (seems like CEPH needs his own network...)

Does anyone has a similar setup ? I can even get rid of the proxmox on 5-6...