[SOLVED] Reduce local and Increase local-lvm Disk size?

[bond347]

Hi All,

After installing proxmox 7.3, i saw the following disk sizes info
- local 100GB
- local-lvm 1.64TB

root:~# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 1.6T 0 disk ├─sda1 8:1 0 1007K 0 part ├─sda2 8:2 0 512M 0 part /boot/efi └─sda3 8:3 0 1.6T 0 part ├─pve-swap 253:0 0 8G 0 lvm [SWAP] ├─pve-root 253:1 0 96G 0 lvm / ├─pve-data_tmeta 253:2 0 15.6G 0 lvm │ └─pve-data 253:4 0 1.5T 0 lvm └─pve-data_tdata 253:3 0 1.5T 0 lvm └─pve-data 253:4 0 1.5T 0 lvm

root:~# vgs VG #PV #LV #SN Attr VSize VFree pve 1 3 0 wz--n- <1.64t 16.00g

root:~# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert data pve twi-a-tz-- <1.49t 0.00 0.14 root pve -wi-ao---- 96.00g swap pve -wi-ao---- 8.00g

How could i reduce local-lvm to 1TB and take 600+/- GB to increase local disk from 100GB to 700GB?

 

[Lukas Wagner]

See https://forum.proxmox.com/threads/reduce-size-of-local-lvm.78676/post-348810

You would also need to execute a 'lvresize' for your root LV after the 'lvremove' step.

So the steps should roughly be (NOT tested, just from the top of my head)

1. lvremove pve/data
2. lvresize -L +600GB pve/root --resizefs
3. lvecreate -L 1000G -ndata pve
4. lvconvert --type thin-pool --poolmetadatasize 10G pve/data

Since you remove the pve/data pool first, make sure that you have a backup of your VMs or CTs that you can restore afterwards.

Since you just installed, you could also just reinstall - in the installer you can specify the sizes of the LVs (advanced settings in disk setup step)

 

[bond347]

Hi Lukas and members,

Thanks for the reply and i will surely try it out soon.

BTW, I'm sure there might be a way to reduce and expand the Data and root LV on the fly without deleting the Data and root LV and resizing it. Why i'm asking this because if the server is a production and running for a year with data on it.

Hope you can shed some info.

 

[Lukas Wagner]

After installing proxmox 7.3

Oh, I thought you have just installed Proxmox VE

BTW, I'm sure there might be a way to reduce and expand the Data and root LV on the fly without deleting the Data and root LV and resizing it. Why i'm asking this because if the server is a production and running for a year with data on it.

As mentioned in the post I have linked, it is unfortunately not possible yet to shrink thin-provisioned thin-pools. The only way seems to be to destroy and recreate, I'm afraid.

 

[bond347]

See https://forum.proxmox.com/threads/reduce-size-of-local-lvm.78676/post-348810

You would also need to execute a 'lvresize' for your root LV after the 'lvremove' step.

So the steps should roughly be (NOT tested, just from the top of my head)

1. lvremove pve/data
2. lvresize -L +600GB pve/root --resizefs
3. lvecreate -L 1000G -ndata pve
4. lvconvert --type thin-pool --poolmetadatasize 10G pve/data

Since you remove the pve/data pool first, make sure that you have a backup of your VMs or CTs that you can restore afterwards.

Since you just installed, you could also just reinstall - in the installer you can specify the sizes of the LVs (advanced settings in disk setup step)

Hi Lukas,

I tried those steps no. 1-4 successfully. Thanks.

I also tried reinstalling and entered 600G for root, 50G for snapshot and leave empty for data volume. Upon completion, I saw the following:

root# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 1.6T 0 disk ├─sda1 8:1 0 1007K 0 part ├─sda2 8:2 0 512M 0 part /boot/efi └─sda3 8:3 0 1.6T 0 part ├─pve-swap 253:0 0 8G 0 lvm [SWAP] ├─pve-root 253:1 0 428.8G 0 lvm / ├─pve-data_tmeta 253:2 0 11.9G 0 lvm │ └─pve-data 253:4 0 1.1T 0 lvm └─pve-data_tdata 253:3 0 1.1T 0 lvm └─pve-data 253:4 0 1.1T 0 lvm root# vgs VG #PV #LV #SN Attr VSize VFree pve 1 3 0 wz--n- <1.64t 50.00g root# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert data pve twi-a-tz-- <1.14t 0.00 0.18 root pve -wi-ao---- 428.75g swap pve -wi-ao---- 8.00g

1. root volume is just 428.8G <-- why not 600G as entered during the installation?
2. data volume is 1.1T <---- I'm ok with the sizing.

Hope you can give some explanation.

 

[Lukas Wagner]

Hi,

you can find the exact effects of the paramters in the documentation (2.3.1 Advanced LVM Configuration), maybe that sheds some light on the issue:

https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_installation