PVE resizing root / data

[mokaz]

Hi there all,
Is there an easy way to resize both the root and data logical volumes?
Here are my details on that drive (hosting the PVE installation). I actually do not use the "data" logical volume at all and would rather allocate it's space to the "root" LV.
My goal being to have a bigger non thin "local" directory to store local backups and ISOs etc..

root@pve:~# lvs
  LV             VG         Attr       LSize   Pool       Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ...                         
  data           pve        twi-aotz--  63.62g                   2.65   1.65                           
  root           pve        -wi-ao----  29.25g                                                         
  swap           pve        -wi-ao----   8.00g

Thanks for any hints.

Regards,
M.

 

[Dunuin]

You need to destroy that data LV (lvdestroy) and then extent your root LV (lvextend) and extend your ext4 filesystem (resize2fs).
But I would backup that system disk first using tools like clonezilla.

I actually do not use the "data" logical volume at all

According to lvs your data LV isn't empty.

 

[mokaz]

Hey there, thanks a lot, I'll see what I'll do... indeed, one LXC stored on that data LV..

 

[mokaz]

Dunuin, would simply resizing the DATA LV and expending the ROOT LV be less sensitive? I can leave with say grabbing 30 GB from the DATA LV really...

 

[Dunuin]

Dunuin, would simply resizing the DATA LV and expending the ROOT LV be less sensitive? I can leave with say grabbing 30 GB from the DATA LV really...

The "data" LV ia not a normal LV. It is a thin pool. As far as I know you can't shrink a thin pool. You can only destroy and recreate it with a smaller size.

 

[mokaz]

Okiii here is what I've done (after having moved all the potential LV's hosted on the original DATA LV):

root@pve:~# lvremove /dev/pve/data -y
  Logical volume "data" successfully removed
 
root@pve:~# lvresize -L +33.62G /dev/pve/root
  Rounding size to boundary between physical extents: 33.62 GiB.
  Size of logical volume pve/root changed from 29.25 GiB (7488 extents) to 62.87 GiB (16095 extents).
  Logical volume pve/root successfully resized.

root@pve:~# resize2fs /dev/pve/root
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/pve/root is mounted on /; on-line resizing required
old_desc_blocks = 4, new_desc_blocks = 8
The filesystem on /dev/pve/root is now 16481280 (4k) blocks long.

root@pve:~# lvcreate -L 30G -n data pve
  Logical volume "data" created.
root@pve:~# lvconvert --type thin-pool pve/data
  Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
  WARNING: Converting pve/data to thin pool's data volume with metadata wiping.
  THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert pve/data? [y/n]: y
  Converted pve/data to thin pool.

root@pve:~# lvs
  LV             VG         Attr       LSize   Pool       Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ...                            
  data           pve        twi-a-tz--  30.00g                   0.00   10.47                          
  root           pve        -wi-ao----  62.87g                                                        
  swap           pve        -wi-ao----   8.00g

Let's hope I'll reboot all fine =)

Thanks for your help,
Cheers,
M.

 

[mokaz]

Okiii here is what I've done (after having moved all the potential LV's hosted on the original DATA LV):

root@pve:~# lvremove /dev/pve/data -y
  Logical volume "data" successfully removed
 
root@pve:~# lvresize -L +33.62G /dev/pve/root
  Rounding size to boundary between physical extents: 33.62 GiB.
  Size of logical volume pve/root changed from 29.25 GiB (7488 extents) to 62.87 GiB (16095 extents).
  Logical volume pve/root successfully resized.

root@pve:~# resize2fs /dev/pve/root
resize2fs 1.46.5 (30-Dec-2021)
Filesystem at /dev/pve/root is mounted on /; on-line resizing required
old_desc_blocks = 4, new_desc_blocks = 8
The filesystem on /dev/pve/root is now 16481280 (4k) blocks long.

root@pve:~# lvcreate -L 30G -n data pve
  Logical volume "data" created.
root@pve:~# lvconvert --type thin-pool pve/data
  Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
  WARNING: Converting pve/data to thin pool's data volume with metadata wiping.
  THIS WILL DESTROY CONTENT OF LOGICAL VOLUME (filesystem etc.)
Do you really want to convert pve/data? [y/n]: y
  Converted pve/data to thin pool.

root@pve:~# lvs
  LV             VG         Attr       LSize   Pool       Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ...                           
  data           pve        twi-a-tz--  30.00g                   0.00   10.47                         
  root           pve        -wi-ao----  62.87g                                                       
  swap           pve        -wi-ao----   8.00g

Let's hope I'll reboot all fine =)

Thanks for your help,
Cheers,
M.

For the sake of completeness, it actually did reboot just fine =)