LVM as backup storage

[simon272]

Hello!

Few weeks ago I configured node wih newest Proxmox 3.3 and main storage I chose is LVM with separated phisical volume. But now I got issue with local backups, since 500Gb mounted on /var/lib/vz is not enough. First idea I get in my mind is to create logical volume in VM's volume group (there is enogh free space) and make backups to it - does any body have practiced with this "hybrid" method? any suggestions is adviced!

LVM layout:
root@tts:~# pvs
PV VG Fmt Attr PSize PFree
/dev/sda3 pve lvm2 a-- 498.50g 0
/dev/sda4 data lvm2 a-- 3.15t 2.71t
root@tts:~# lvs
LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert
vm-100-disk-1 data -wi-ao--- 250.00g
vm-101-disk-1 data -wi-ao--- 150.00g
vm-102-disk-1 data -wi-ao--- 50.00g
data pve -wi-ao--- 371.50g
root pve -wi-ao--- 96.00g
swap pve -wi-ao--- 31.00g





df -h:
/dev/mapper/pve-root 95G 1.8G 88G 2% //dev/mapper/pve-data 366G 260G 88G 75% /var/lib/vz
/dev/sda2 494M 65M 405M 14% /boot
/dev/fuse 30M 16K 30M 1% /etc/pve

 

[NdK73]

It does not seem a good idea: you're going to put backups on the same disks where the VM data resides. IOW all your eggs in the same bucket: if it breaks, you lose all your data.

 

[simon272]

Thanks for reply NdK73, I have raid10 in back end of my storage and this backup is for "logical" inconsistency only, so main question is how to use VG-storage for backups ...

 

[simon272]

Got it done.
Just created logical volume on VM's physical volume, proxmox accept this and get storage stats up to date (aviable/free space on VG), then add new line to fstab and additional storage to proxmox, mark it as Backups - that's all...