Backup won't work: Volume group "vg0" has insufficient free space

[dan]

I've tried to start the backup process of a VM manually but getting the following error message:

INFO: starting new backup job: vzdump 101 --mode snapshot --compress 1 --storage backup --node pve
INFO: Starting Backup of VM 101 (openvz)
INFO: CTID 101 exist mounted running
INFO: status = running
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating lvm snapshot of /dev/mapper/vg0-vz ('/dev/vg0/vzsnap-pve-0')
INFO: Volume group "vg0" has insufficient free space (0 extents): 256 required.
ERROR: Backup of VM 101 failed - command ''lvcreate --size 1024M --snapshot --name vzsnap-pve-0 /dev/vg0/vz'' failed: exit code 5
INFO: Backup job finished with errors
TASK ERROR: job errors

If I check the free space on the host machine, there seems to be sufficient space left.

df -hFilesystem Size Used Avail Use% Mounted on
/dev/mapper/vg0-root 120G 1.4G 112G 2% /
tmpfs 12G 0 12G 0% /lib/init/rw
udev 12G 260K 12G 1% /dev
tmpfs 12G 19M 12G 1% /dev/shm
/dev/md0 4.0G 114M 3.7G 3% /boot
/dev/mapper/vg0-backup
298G 191M 283G 1% /backup
/dev/mapper/vg0-vz 916G 41G 830G 5% /var/lib/vz
/dev/fuse 30M 20K 30M 1% /etc/pve

The backup space its mounted on /backup. What I'm doing wrong?

Thanks for any help.

 

[bread-baker]

1- try setting this in /etc/vzdump.conf

size: 4000

2- if that does not work try using stop mode .

check other posts in this forum, and check bugs reports at https://bugzilla.proxmox.com/

 

[dan]

Thanks for your reply. I'm getting the same error:

INFO: starting new backup job: vzdump 101 --mode snapshot --compress 1 --storage backup --node pve
INFO: Starting Backup of VM 101 (openvz)
INFO: CTID 101 exist mounted running
INFO: status = running
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating lvm snapshot of /dev/mapper/vg0-vz ('/dev/vg0/vzsnap-pve-0')
INFO: Volume group "vg0" has insufficient free space (0 extents): 1000 required.
ERROR: Backup of VM 101 failed - command ''lvcreate --size 4000M --snapshot --name vzsnap-pve-0 /dev/vg0/vz'' failed: exit code 5
INFO: Backup job finished with errors
TASK ERROR: job errors

 

[bread-baker]

try stop or suspend mode

 

[dan]

suspending works but I would rather like to use the snapshot mode... Is this a bug or a miss configuration on my part?

 

[bread-baker]

probably a bug. I know it will be fixed . in the mean time we use the backup mode that works . no backups = not a good word.

we have been using suspend or stop mode for 6 days on 4 nodes with out a problem.

and use rsnapshot , with each node having a copy of the backups from every other node.

I do not mind reinstalling as long as there are backups.

 

[tom]

you have no free space in your volume group (vg0). it looks like you did not install with our installer and you missed to left some space for snapshots. (our installer reservers this automatically).

pls note, this has nothing to do with the free space in the file system. take a look in the lvm2 documentation.