iSCSI, LVM and HA confusion

[pai]

So I have a simple 3-node Proxmox lab + Synology NAS.
My goal is to be able to build images using Hashicorp Packer and create VM's using Terraform declarations based on those images later.

As far as I understand in order to create a VM from an image the storage of this image must exist on a shared resource and I read that iSCSI + LVM on top of it should be fine but I'm getting errors like:

Should I use another storage driver like NFS? What's the point of iSCSI + LVM if it can't be shared between proxmox nodes?
https://pve.proxmox.com/wiki/Storage says that

3: It is possible to use LVM on top of an iSCSI or FC-based storage. That way you get a shared LVM storage

 

[bbgeek17]

The warning is due to having cloud-init drive on local storage (local-lvm)

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Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox