Issues with proxmox cluster and multipath.

[milank2]

Hello everyone,
I have proxmox cluster(7.4.3) with 3 nodes connected with iscsi to Dell storage.
Node 1 is working fine and it is connected to the storage with multipath enabled.
The node 2 and 3 multipath is configured :

ode2:/# multipath -ll
mpathLUN2 (3600c0ff00066d22c5c91266401000000) dm-5 DellEMC,ME5
size=11T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=30 status=active
|- 11:0:0:1 sdc 8:32 active ready running
|- 12:0:0:1 sdb 8:16 active ready running
|- 13:0:0:1 sdd 8:48 active ready running
`- 14:0:0:1 sde 8:64 active ready running
and:
node2:/# /lib/udev/scsi_id -v -g /dev/sdd
3600c0ff00066d22c5c91266401000000
root@vig-rajska-zahrada-node2:/# /lib/udev/scsi_id -v -g /dev/sde
3600c0ff00066d22c5c91266401000000
and so on for sdc and sdd

But when I add the lvm in Datacenter, storage, lvm I get error:



Can you please help me out.
Thanks a lot.

 

[bbgeek17]

If you have multipath properly configured on all nodes, you should be using DM device, not direct sdX devices.
Your problem description is a bit confusing - you have storage configured in a cluster, it appears from screenshot to be presented to all nodes, you say its working on node1 - meaning you actually use it for VMs already? Yet you are trying to add another LVM layer on top of working storage?

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

 

[milank2]

Hi thanks for answering, yes node 1 has woking storage LVM1 which connected to vm.
vm has it mounted under /mnt
Yes mounting LVM layer on top of Dell storage

 

[bbgeek17]

You have to figure out:
a) What device is LVM1 pointing to? (lvs/vgs/pvs)
b) Is LVM1 a thin or thick LVM?
c) If thick - is it marked "shared" in PVE config?
d) If its pointing to DM device, has LVM thick and is marked shared - why are you trying to create new VGs on underlying raw devices on other nodes?

---

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