ZFS via iscsi

[jhonnytay]

Dear Support,

Need your advise, If I wish to setup HA for 4 nodes and shared storage ZFS is via Iscsi HITACHI.

Please correct if the following sequence is correct:
1. Add each node (total) to same cluster.
2. Add SFS in each node through the same LUN.
3. Group the node and define the HA?

Need Proxmox support to enlighten me.

Best Regards,

 

[wolfgang]

Hi,

it is not possible to create a shared ZFS on a SAN that does only provide iSCSI LUNs.
ZFS over iSCSI works if the NAS has ZFS and the created zvol on the NAS are exposed to the cluster as a LUN.

If your SAN has no ZFS you can use LVM for shared cluster use.
Do not use Thin-LVM this does not work with shared access.

 

[jhonnytay]

Hi,

it is not possible to create a shared ZFS on a SAN that does only provide iSCSI LUNs.
ZFS over iSCSI works if the NAS has ZFS and the created zvol on the NAS are exposed to the cluster as a LUN.

If your SAN has no ZFS you can use LVM for shared cluster use.
Do not use Thin-LVM this does not work with shared access.

Dear Sir,

Thank you for your update. In the meantime, the iscsi is managed to added to the nodes, but would that possible if I create multipath for this iscsi connection? and use LVM for shared cluster use? is this mandatory in order to setup HA? thank you again sir.

Best Regards,
Jhonny

 

[wolfgang]

Multipath [1] with shared LVM is possible.
For HA you must have all components redundant.

1.) https://pve.proxmox.com/wiki/ISCSI_Multipath

 

[trent--]

Hi,

it is not possible to create a shared ZFS on a SAN that does only provide iSCSI LUNs.
ZFS over iSCSI works if the NAS has ZFS and the created zvol on the NAS are exposed to the cluster as a LUN.

If your SAN has no ZFS you can use LVM for shared cluster use.
Do not use Thin-LVM this does not work with shared access.

Hello,
I have a 3 node Proxmox cluster, with shared iSCSI storage provided by Online (see specs here : https://www.scaleway.com/en/dedibox/storage/rpn-san/)
The storage only provides acces to iSCSI LUNs, so that means I'm stuck with using the storage as iscsi inside Proxmox, for shared access. Is this right ?
Is there any way to support snapshots with this setup ?