Problems with LVM data drive and LXC container

[bastify]

Hi,

I create an LXC container (500Gb) with centos and add a resource with an a LVM logical volume (900Gb) with all backup info. The container has problems and we decide to remove the container that and reinstall centos. When we mount again the LVM volume, it appears empty. We need to recover all data. What can we do?

root@ded-une2583:~# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
vm-100-disk-0 Data-Storage -wi-a----- 900.00g
data pve twi-aotz-- 423.79g 17.05 0.84
root pve -wi-ao---- 20.00g
swap pve -wi-ao---- 8.00g
vm-100-disk-0 pve Vwi-aotz-- 500.00g data 14.45

root@ded-une2583:~# fdisk -l
Disk /dev/nvme0n1: 477 GiB, 512110190592 bytes, 1000215216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: A59E1D8C-7F8C-449D-B82A-37E0B35BD59C

Device Start End Sectors Size Type
/dev/nvme0n1p1 34 2047 2014 1007K BIOS boot
/dev/nvme0n1p2 2048 1050623 1048576 512M EFI System
/dev/nvme0n1p3 1050624 1000215182 999164559 476.4G Linux LVM


Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xff972f74

Device Boot Start End Sectors Size Id Type
/dev/sda1 2048 1953525167 1953523120 931.5G 83 Linux


Disk /dev/mapper/pve-swap: 8 GiB, 8589934592 bytes, 16777216 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-root: 20 GiB, 21474836480 bytes, 41943040 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/pve-vm--100--disk--0: 500 GiB, 536870912000 bytes, 1048576000 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 65536 bytes / 65536 bytes


Disk /dev/mapper/Data--Storage-vm--100--disk--0: 900 GiB, 966367641600 bytes, 1887436800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

 

[Alwin]

While my reply is sure late, to add that with LVM-thin you better restore from backup. An recovery is very very hard to nearly impossible, especially if other VM/CT have written data to the LVM-thin storage.