How to extend LVM thin pool

D

dfranco

Active Member
Jul 6, 2015
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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.
 
dfranco said:
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
Click to expand...


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

Code: 
lvresize -L +300G vmdata/thinvol
 
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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
 
dfranco said:
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
Click to expand...
Yes
 
Thank you Richard,

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

Best regards
 
AmateurProgrammer said:
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
Click to expand...
Totally agree. I'm struggling now with it and this would be a great enhancement.
 
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