mode failure - wrong lvm mount point

[DaveQB]

Hi all,

I have used LVM over the years and I understand to make a snapshot LV you need spare, unused space on the VG. Also, with vzdump you must put the backup to a separate partition.

But can that partition reside in the VG? It seems no.


Error

101: Jan 14 16:01:32 INFO: Starting Backup of VM 101 (openvz)
  101: Jan 14 16:01:32 INFO: CTID 101 exist mounted running
  101: Jan 14 16:01:32 INFO: status = CTID 101 exist mounted running
  101: Jan 14 16:01:32 INFO: mode failure - wrong lvm mount point '/mnt/storage'
  101: Jan 14 16:01:32 INFO: trying 'suspend' mode instead
  101: Jan 14 16:01:32 INFO: backup mode: suspend

root@proxmox:~# df -h /mnt/storage/
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/storage-one
                      592G  159G  404G  29% /mnt/storage

The --storage argument is Backup which points to /mnt/backup/VZ/

root@proxmox:~# df -h /mnt/backups/VZ/
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/storage-two
                      394G   12G  362G   4% /mnt/backups

 --- Volume group ---
  VG Name               storage
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  8
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               1.36 TB
  PE Size               4.00 MB
  Total PE              357701
  Alloc PE / Size       256256 / 1001.00 GB
  Free  PE / Size       101445 / 396.27 GB
  VG UUID               XP6nH2-fSMJ-VwGO-3LKX-0YCT-sHW6-XXA7lu

I tried to manually create a snapshot LV and was successful.

root@proxmox:~# lvcreate -L2000M -s -n test  /dev/storage/one
  Logical volume "test" created
root@proxmox:~# mkdir l
root@proxmox:~# mount /dev/storage/
one   test  two
root@proxmox:~# mount /dev/storage/test l
root@proxmox:~# ls l/vz/private/
101  102  104  105  106  107  108  109  110  111  112  113  114
root@proxmox:~# umount l
root@proxmox:~# lvremove  /dev/storage/test
Do you really want to remove active logical volume "test"? [y/n]: y
  Logical volume "test" successfully removed

Do I need to change the --storage to a completely different VG?
Actually, I have tried on a seperate NFS mount and same error. I think there is another issue here.....

Thanks for reading

 

[DaveQB]

Ahhh a little more searching.

http://forum.openvz.org/index.php?t=msg&goto=35124&

So it seems by use of bind mounts has confused vzdump.

root@proxmox:~# mount | grep bind
/mnt/storage/vz on /var/lib/vz type none (rw,bind)
..truncated...

So I might need to mount /dev/storage/one onto /var/lib/vz and then bind mount it to /mnt/storage/ hmmmm

Or I might cut up that disk some more with LVM. I was trying to avoid that.