Backup to NFs crashes Nodes and VMS

G

gerdnl

Member
Oct 21, 2013
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when running full backups to NFS all my nodes go offline and vms to
what could cause this?

even from 1 of my vms all data is gone
 
- Network problems
- Slow NFS server
- Slow CPU in proxmox host
etc

If network and/or NFS server is an issue you can try this quick fix:
1) sudo nano /etc/vzdump.conf
2) Add: tmpdir: /var/lib/vz/vztmp

Above setting means that workdir for creating compressed backup is done on the host instead of your NFS server and that the file is first transferred to the destination when the compressed file is ready (Transferring one big file instead of a lot of small fragments increases performance greatly)
 
No. By network problems I think of congestion when the backup runs and especially if the backup shares the same nic with cluster communication and storage for other VM's. If backup is network intensive it could be an idea to create a separate network for backup. Anyways, try my suggestion first and see if this solves your problem.
 
just for info, the NFS is a QNAP connected to a public ip, the NFS transfer rates seemed slow to me indeed.
 
on 1 vm im getting no bootable device.
seems like that vm got corrupted somehow

anyway to fix that?
 
Jul 31 21:43:01 INFO: status: 33% (120494489600/365072220160), sparse 0% (1635422208), duration 9734, 13/13 MB/s
Jul 31 21:49:09 INFO: status: 34% (124143403008/365072220160), sparse 0% (1687859200), duration 10102, 9/9 MB/s
Jul 31 21:51:58 ERROR: unable to find configuration file for VM 106 - no such machine
Jul 31 21:51:58 INFO: aborting backup job
Jul 31 21:52:00 ERROR: Backup of VM 106 failed - unable to find configuration file for VM 106 - no such machine
 
the weird thing is that 106 is not on pve03 but on pve01 (the original location)
both conf files are empty do
 
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