[SOLVED] Backup: '/var/lib/vz/tmp_backup' full, how to use other mount point?

[le_top]

PROXMOX VE5.0-33 does not succeed in backing up a virtual machine with a raw disk of 350GB.
That's because during the initial sync, the '/var/lib/vz/tmp_backup' space gets full.

The question is :
How to use a location in '/mnt/bigdisk' for that where the VM is located? Or another technique for efficient backup of this machine?.


The virtual machine is "hosted" in /mnt/bigdisk("big" hard drive), it is currently synced to /var/lib/vz ("small" SSD) for backup (how to change that) and the backup files go to /mnt/bigdisk.

So there are two kinds of spaces on the node: one "small" backed by SSD and one "big" backed by hard drives.

Here is an overview of the relevant mounting points:

Filesystem 1K-blocks Used Available Use% Mounted on
udev 131998344 0 131998344 0% /dev
tmpfs 26403580 141264 26262316 1% /run
/dev/sda1 20026236 2436096 16566192 13% /
tmpfs 132017896 64368 131953528 1% /dev/shm
tmpfs 5120 0 5120 0% /run/lock
tmpfs 132017896 0 132017896 0% /sys/fs/cgroup
/dev/mapper/pve-data 10190136 37008 9628844 1% /var/lib/vz
vmpool 342241792 128 342241664 1% /vmpool
vmpool/subvol-102-disk-1 33554432 17059200 16495232 51% /vmpool/subvol-102-disk-1
/dev/sdb1 1921279812 581308404 1242322824 32% /mnt/bigdisk
/dev/fuse 30720 36 30684 1% /etc/pve
​

Here is the transcript (server name changed to example.com for privacy):

108: 2017-10-22 05:12:24 INFO: Starting Backup of VM 108 (lxc)
108: 2017-10-22 05:12:24 INFO: status = running
108: 2017-10-22 05:12:24 INFO: CT Name: example.com
108: 2017-10-22 05:12:24 INFO: mode failure - some volumes do not support snapshots
108: 2017-10-22 05:12:24 INFO: trying 'suspend' mode instead
108: 2017-10-22 05:12:24 INFO: backup mode: suspend
108: 2017-10-22 05:12:24 INFO: ionice priority: 7
108: 2017-10-22 05:12:24 INFO: CT Name: example.com
108: 2017-10-22 05:12:24 INFO: starting first sync /proc/21983/root// to
/var/lib/vz/tmp_backup/vzdumptmp7777​

108: 2017-10-22 05:13:34 INFO: rsync: write failed on
"/var/lib/vz/tmp_backup/vzdumptmp7777/root/gcc-4.9.3/x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu/bits/stdc++.h.gch/O2g.gch":
No space left on device (28)
108: 2017-10-22 05:13:34 INFO: rsync error: error in file IO (code 11) at
receiver.c(393) [receiver=3.1.2]
108: 2017-10-22 05:13:46 ERROR: Backup of VM 108 failed - command 'rsync --stats -X -A --numeric-ids -aH --delete --no-whole-file --sparse --one-file-system --relative '--exclude=/tmp/?*' '--exclude=/var/tmp/?*'
'--exclude=/var/run/?*.pid' /proc/21983/root///./ /var/lib/vz/tmp_backup/vzdumptmp7777' failed: exit code 11


The VM disk is listed as: bigdisk_ct:108/vm-108-disk-1.raw,size=350G which is on /mnt/bigdisk

 

[wolfgang]

Hi,

you can set the tmpdir in /etc/vzdump.conf.
For more information see
https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_vzdump

 

[le_top]

Thank you, that fixes it.