Proxmox: Adding Existing Logical Volumes
Adding existing logical volumes to the list of virtual disks is non-obvious.
First add the VG to Proxmox using the “Storage|Add” UI. Once done, adding existing LV to Proxmox must be done via LVM command line tools.
A logical volume needs to have the correct naming, and (surprise!) an LVM tag set. For the correct tag (and LV name) format, use the UI to create a sample volume (VM|Hardware|Add|Hard Disk).
Note: LV names must fit a certain pattern. However, names like this seem to work: vm-110-timemachine.
The example below shows a pre-existing LV (vg1/vm-110-disk-2) without the “pve-vm-110” tag Proxmox requires.
Subsequent steps add the tag, after which the volume appears in Proxmox.
# lvs -o vg_name,lv_name,lv_tags
VG LV LV Tags
pve data
pve root
pve swap
vg0 vm-110-disk-1 pve-vm-110
vg0 vm-110-disk-2 pve-vm-110
vg1 vm-110-disk-1 pve-vm-110
vg1 vm-110-disk-2
To see LV tags:
# lvs @pve-vm-110
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
vm-110-disk-1 vg0 -wi-ao--- 500.00g
vm-110-disk-2 vg0 -wi-ao--- 750.00g
vm-110-disk-1 vg1 -wi-ao--- 750.00g
To add missing tags:
# lvchange --addtag pve-vm-110 /dev/vg1/vm-110-disk-2
Refresh the Proxmox Storage UI to see the new LV.
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