Unable to Perform Live Migration with Clustered LVM (lvmlockd/sanlock) on Shared FC LUN

[dsintayehu]

Unable to Perform Live Migration with Clustered LVM (lvmlockd/sanlock) on Shared FC LUN

Hi all,

I have a 3-node Proxmox VE 8.4.14 cluster (nodes: dev-proxhost1-mas, dev-proxhost2, and dev-proxhost3) connected to a Dell EMC Unity storage array over Fibre Channel.

• The Unity array presents one shared 5 TB LUN to all nodes.
• Multipath is configured and works correctly (/dev/mapper/mpatha).
• I created a Clustered LVM volume group (Unity-CLVM) with lvmlockd + sanlock.
• Each node has its own /etc/lvm/lvmlocal.conf with a unique host_id.
• The VG is active and shared, and all VMs can be created and cold-migrated between nodes.

Problem:
Live (online) migration always fails with this error:

can't activate LV '/dev/Unity-CLVM/vm-XXXX-disk-0':

Failed to lock logical volume Unity-CLVM/vm-XXXX-disk-0.

Cold migration works perfectly, but online migration fails at the target activation step.

 

[bbgeek17]

Hi @dsintayehu , welcome to the forum.

The CLVM is not a supported or tested method of implementing shared storage in PVE.
PVE takes on the responsibility of the lock coordinator in its environment and that may very well interfere in CLVM.

You don't need CLVM - just implement LVM natively the PVE way.
For reference: https://kb.blockbridge.com/technote/proxmox-lvm-shared-storage/

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