How to extend LVM thin pool

[dfranco]

Hello,

I'm running ProxMox VE version below
pve-manager/5.3-5/97ae681d (running kernel: 4.15.18-9-pv

I'd like to increase one of our LVM thin pool from 300 GB to 600 GB (see LVM pv and vg below)

PV VG Fmt Attr PSize PFree
/dev/sdb1 vmdata lvm2 a-- 931.00g 630.85g

VG #PV #LV #SN Attr VSize VFree
vmdata 1 4 0 wz--n- 931.00g 630.85g

I did found how to extend the LVM thin pool metada here
https://pve.proxmox.com/wiki/LVM2#Create_a_extra_LV_for_.2Fvar.2Flib.2Fvz

But can't find anything else.

As this is a production server, what are the "best practice" to extend an LVM thin pool ?
Can I do it while KVM and LXC are running on it ?
Should I do a dump of each vms ?

Thanks in advance for any help.

 

[Richard]

I'd like to increase one of our LVM thin pool from 300 GB to 600 GB (see LVM pv and vg below)

PV VG Fmt Attr PSize PFree
/dev/sdb1 vmdata lvm2 a-- 931.00g 630.85g

VG #PV #LV #SN Attr VSize VFree
vmdata 1 4 0 wz--n- 931.00g 630.85g

Assuming your lvm-thione volume has the name "thinvol" run

lvresize -L +300G vmdata/thinvol

 

[dfranco]

Thank you Richard.

Thanks but my question was more about "precautions" before resizing LVM thin volume.
Can we resize the volume with up and running KVM + LXC running on it ?

Best regards

 

[Richard]

Thank you Richard.

Thanks but my question was more about "precautions" before resizing LVM thin volume.
Can we resize the volume with up and running KVM + LXC running on it ?

Best regards

Yes

 

[dfranco]

Thank you Richard,

I guess it's the same while resizing thin pool metadata.

Best regards

 

[AmateurProgrammer]

Yes

It would be nice to have the expansion functionality in the web ui instead of having to run commands separately for the metadata and actual lv size increase. I still could not find this functionality in PVE 8.3