[pve-devel] [PVE-User] bug with vzdump very dangerous !!!!!

[Alexandre DERUMIER]

I think we could at least add a check for free space on backup storage.
(maybe something like : minimum free space  = total size of disks vm.).
We can't known how much compression will be done.


But of course this bug should be fixed.


----- Mail original -----
De: "Jean-Laurent Ivars" <jl.ivars at ipgenius.fr>
À: "proxmoxve" <pve-user at pve.proxmox.com>
Envoyé: Vendredi 13 Mars 2015 12:16:36
Objet: [PVE-User] bug with vzdump very dangerous !!!!!

Hi all, 

I am an happy user of Proxmox since a few years but tonight i had a very serious issue : 
I ran out of space on my nfs backup storage and guess what happened ? Of course the backup could not run but the problem is that ALL MY KVM MACHINES HAVE BEEN STOPPED BY THE VZDUMP PROCESS !!! (and of course i have not been warned because my supervision machine was on the same cluster… stupid me) 

This is a very dangerous bug, at the beginning I did not understand what happened but i found this thread where someone had the very same issue : 
http://forum.proxmox.com/threads/21040-VZDUMP-backup-causes-KVM-QEMU-VM-to-shutdown-if-backup-storage-is-full 

I don’t understand why nobody answered him on the forum, in my opinion this is a very serious bug and should be repaired as soon as possible ! 

I give you some technical info (ask me if you need more) 

first precision : I don’t know if it’s relevant but my backup are in snapshot mode 

root @ vha ~ # pveversion -v 
proxmox-ve-2.6.32: 3.3-139 (running kernel: 2.6.32-34-pve) 
pve-manager: 3.3-5 (running version: 3.3-5/bfebec03) 
pve-kernel-2.6.32-33-pve: 2.6.32-138 
pve-kernel-2.6.32-29-pve: 2.6.32-126 
pve-kernel-2.6.32-34-pve: 2.6.32-140 
lvm2: 2.02.98-pve4 
clvm: 2.02.98-pve4 
corosync-pve: 1.4.7-1 
openais-pve: 1.1.4-3 
libqb0: 0.11.1-2 
redhat-cluster-pve: 3.2.0-2 
resource-agents-pve: 3.9.2-4 
fence-agents-pve: 4.0.10-1 
pve-cluster: 3.0-15 
qemu-server: 3.3-3 
pve-firmware: 1.1-3 
libpve-common-perl: 3.0-19 
libpve-access-control: 3.0-15 
libpve-storage-perl: 3.0-25 
pve-libspice-server1: 0.12.4-3 
vncterm: 1.1-8 
vzctl: 4.0-1pve6 
vzprocps: 2.0.11-2 
vzquota: 3.1-2 
pve-qemu-kvm: 2.1-10 
ksm-control-daemon: 1.1-1 
glusterfs-client: 3.5.2-1 
root @ vha ~ # 


exemple of backup log : 
101: mars 12 22:00:03 INFO: Starting Backup of VM 101 (qemu)
101: mars 12 22:00:03 INFO: status = running
101: mars 12 22:00:03 INFO: update VM 101: -lock backup
101: mars 12 22:00:04 INFO: backup mode: snapshot
101: mars 12 22:00:04 INFO: ionice priority: 7
101: mars 12 22:00:05 INFO: creating archive '/mnt/pve/stock/dump/vzdump-qemu-101-2015_03_12-22_00_03.vma.lzo'
101: mars 12 22:00:05 ERROR: client closed connection 101: mars 12 22:00:05 INFO: aborting backup job
101: mars 12 22:00:05 ERROR: VM 101 not running 101: mars 12 22:00:06 ERROR: Backup of VM 101 failed - client closed connection 

Now that i’m aware of this bug I will be more careful and won’t been catch again but i think it’s something that everyone should be warned about ! 

Best regards, 


	
Jean-Laurent Ivars 
Responsable Technique | Technical Manager 
22, rue Robert - 13007 Marseille 
Mobile: 06.52.60.86.47 - Tel: 09 84 56 64 30 - Fax: 09 89 56 64 30 
Linkedin | Viadeo | www.ipgenius.fr 


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