Back up failing

[paulwarren]

Hi,

Wonder if someone could help.

I'm getting the following error when trying to backup a snapshot of a vm


INFO: starting new backup job: vzdump 105 --remove 0 --mode snapshot --compress lzo --storage Backup_server --node ns6450343
INFO: Starting Backup of VM 105 (openvz)
INFO: CTID 105 exist mounted running
INFO: status = running
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: creating lvm snapshot of /dev/mapper/pve-data ('/dev/pve/vzsnap-ns6450343-0')
INFO: Logical volume "vzsnap-ns6450343-0" created
INFO: creating archive '/mnt/backup/proxmox_vzdump/dump/prox5/dump/vzdump-openvz-105-2015_06_16-11_49_40.tar.lzo'
INFO: find: `./var/lib/jenkins/workspace/live-master-mailer/rp/src/main/webapp/js': Input/output error

--- --- i get this error all the way through on every file.

NFO: tar: ./ghost: Read error at byte 0, while reading 512 bytes: Input/output error
INFO: Total bytes written: 32824709120 (31GiB, 20MiB/s)
INFO: tar: Exiting with failure status due to previous errors
ERROR: Backup of VM 105 failed - command '(cd /mnt/vzsnap0/private/105;find . '(' -regex '^\.$' ')' -o '(' -type 's' -prune ')' -o -print0|sed 's/\\/\\\\/g'|tar cpf - --totals --sparse --numeric-owner --no-recursion --one-file-system --null -T -|lzop) >/mnt/backup/proxmox_vzdump/dump/prox5/dump/vzdump-openvz-105-2015_06_16-11_49_40.tar.dat' failed: exit code 2
INFO: Backup job finished with errors
TASK ERROR: job errors


all other vm's back up ok (smaller in size)

Filesystem Size Used Avail Use% Mounted on
udev 10M 0 10M 0% /dev
tmpfs 26G 384K 26G 1% /run
/dev/md2 20G 4.7G 14G 26% /

Any help would be great full!

 

[tom]

snapshot full? (search the forum for increasing the snapshot size via /etc/vzdump.conf)

 

[paulwarren]

Hi Tom,

Thanks for this, yes full snapshots, I had a quick look at the /etc/vzdump.conf and it's all set to default so size is default to 1024? from what I read.

I've read through this thread http://forum.proxmox.com/threads/12390-vzdump-conf-tweaking-backups-failing

also run
root@ns6450343:~# pvdisplay
--- Physical volume ---
PV Name /dev/md4
VG Name pve
PV Size 2.71 TiB / not usable 2.94 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 710139
Free PE 1024
Allocated PE 709115

I done 1024 * 4 = 4096

I guess I have 4gb available? I set the size to 2048mb

Do i need to restart anything to take effect?

Thanks
Paul

 

[tom]

no need to restart anything, the next backup job will pick the setting.

2048mb is also not that big. next time please make sure that you leave more space for LVM snaphots, especially if you have big (and slow) hard disks.

 

[paulwarren]

Hi Tom,

Thanks for the response so far. I guess the problem is the snapshot is bigger then 4096mb? I have set the size to 4096mb (max the system can do) and this still fails. I guess there is nothing else I can do other then increase the file system?

The server came from ovh.co.uk as pre setup config so never had a option to change the partitions.

What would the recommended size be for say couple vm's round 80gb ish?


Thanks
Paul

 

[tom]

did you ever though about using suspend instead of snapshot mode?

in this case, no LVM snapshots are involved.

see http://pve.proxmox.com/wiki/Backup_and_Restore#Backup