Problem with backups... :-(

[Netizen]

Hello,

I am very new to Proxmox.
I am trying to perform backups of the KVM-qemu guests that I have however I am getting the following error:

====================
Aug 21 13:27:20 INFO: Starting Backup of VM 102 (qemu)
Aug 21 13:27:20 INFO: status = running
Aug 21 13:27:21 INFO: mode failure - unable to dump into snapshot (use option --dumpdir)
Aug 21 13:27:21 INFO: trying 'suspend' mode instead
Aug 21 13:27:21 INFO: backup mode: suspend
Aug 21 13:27:21 INFO: ionice priority: 7
Aug 21 13:27:21 INFO: suspend vm
Aug 21 13:27:21 INFO: creating archive '/VMS-BACKUPS/dump/vzdump-qemu-102-2012_08_21-13_27_20.tar.lzo'
Aug 21 13:27:21 INFO: adding '/VMS-BACKUPS/dump/vzdump-qemu-102-2012_08_21-13_27_20.tmp/qemu-server.conf' to archive ('qemu-server.conf')
Aug 21 13:27:21 INFO: adding '/var/lib/vz/images/102/vm-102-disk-1.raw' to archive ('vm-disk-ide1.raw')
Aug 21 13:28:37 INFO: Total bytes written: 16106129920 (202.11 MiB/s)
Aug 21 13:28:37 INFO: archive file size: 1.62GB
Aug 21 13:28:38 INFO: resume vm
Aug 21 13:28:38 INFO: vm is online again after 77 seconds
Aug 21 13:28:38 INFO: Finished Backup of VM 102 (00:01:18)
====================


I understand that snapshot backups require LVM to work however my root (/) in based on LVM so /VMS-BACKUPS should work, correct?
My fstab is as follows:

proc /proc proc defaults 0 0
none /dev/pts devpts gid=5,mode=620 0 0
/dev/md/0 /boot ext3 defaults 0 0
# /dev/md/1 belongs to LVM volume group 'vg0'
/dev/vg0/swap swap swap defaults 0 0
/dev/vg0/root / ext4 defaults 0 0


Isn't this the correct way of arranging the hard disk for proxmox (and hence the snapshot backups)?

Please advise,

Thank you
N

 

[jmjosebest]

Result of vgdisplay command?

 

[Netizen]

Result of vgdisplay command?

--- Volume group ---
VG Name vg0
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
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 2.73 TiB
PE Size 4.00 MiB
Total PE 715268
Alloc PE / Size 715264 / 2.73 TiB
Free PE / Size 4 / 16.00 MiB
VG UUID PVAb4a-RtCh-6TdX-08KA-21BE-0QfN-YNZrS3

 

[dietmar]

It is simply not possible to store a snapshot inside a snapshot - that is a recursive loop. Please select another backup target.

 

[Netizen]

--- Volume group ---
VG Name vg0
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
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 2.73 TiB
PE Size 4.00 MiB
Total PE 715268
Alloc PE / Size 715264 / 2.73 TiB
Free PE / Size 4 / 16.00 MiB
VG UUID PVAb4a-RtCh-6TdX-08KA-21BE-0QfN-YNZrS3

 

[Netizen]

So what is the best/recommended partition for a 3TB disk?

My current partition structure is this:

PART /boot ext3 512M
PART lvm vg0 all
LV vg0 swap swap swap 34G <<<< (Is the 34G swap partition too big? Am I wasting space? I selected 34 because is RAM +2)
LV vg0 root / ext4 2760G

Should I just create another Logocal Volume?

 

[dietmar]

Our Installation CD creates a reasonable partitioning.

 

[Netizen]

Thank you for the reply.
A bit more detailed information would be much appreciated as not everyone uses your installation CD and especially customers of the well-known Hetzner DataCenters, one of which happens to be me...

Rgds

 

[dietmar]

not everyone uses your installation CD and especially customers of the well-known Hetzner DataCenters, one of which happens to be me...

Hetzner can document that it they want.