Backup failes all the time

G

Gamienator

Member
Mar 16, 2021
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Hello everyone,

I got an issue here that maybe you're able to help me.

On my root Server on my hoster Hetzner is the latest Proxmox VE running. For backup reasons I ordered a "Storage Box", which is a backup place that can be reached via SMB/CIFS, WebDAV etc. After connecting the box via SMB/CIFS I run my backups. Sadly every backup fails for my LXC Containers. The VMs are running totally fine:

Code: 
vzdump 105 106 108 --prune-backups 'keep-last=2' --storage storagebox --compress zstd --quiet 1 --mailnotification always --node proxmox --mailto me@mail.com --mode suspend --notes-template '{{guestname}}'


105: 2023-01-02 04:00:01 INFO: Starting Backup of VM 105 (lxc)
105: 2023-01-02 04:00:01 INFO: status = running
105: 2023-01-02 04:00:01 INFO: backup mode: suspend
105: 2023-01-02 04:00:01 INFO: ionice priority: 7
105: 2023-01-02 04:00:01 INFO: CT Name: stephan-seedbox
105: 2023-01-02 04:00:01 INFO: including mount point rootfs ('/') in backup
105: 2023-01-02 04:00:01 INFO: starting first sync /proc/1640275/root/ to /var/tmp/vzdumptmp1551178_105
105: 2023-01-02 11:01:08 ERROR: Backup of VM 105 failed - command 'rsync --stats -h -X -A --numeric-ids -aH --delete --no-whole-file --sparse --one-file-system --relative '--exclude=/tmp/?*' '--exclude=/var/tmp/?*' '--exclude=/var/run/?*.pid' /proc/1640275/root//./ /var/tmp/vzdumptmp1551178_105' failed: exit code 23

106: 2023-01-02 11:01:08 INFO: Starting Backup of VM 106 (lxc)
106: 2023-01-02 11:01:08 INFO: status = running
106: 2023-01-02 11:01:08 INFO: backup mode: suspend
106: 2023-01-02 11:01:08 INFO: ionice priority: 7
106: 2023-01-02 11:01:08 INFO: CT Name: stephan-nextcloud
106: 2023-01-02 11:01:08 INFO: including mount point rootfs ('/') in backup
106: 2023-01-02 11:01:08 INFO: starting first sync /proc/3468251/root/ to /var/tmp/vzdumptmp1551178_106
106: 2023-01-02 12:15:42 ERROR: Backup of VM 106 failed - command 'rsync --stats -h -X -A --numeric-ids -aH --delete --no-whole-file --sparse --one-file-system --relative '--exclude=/tmp/?*' '--exclude=/var/tmp/?*' '--exclude=/var/run/?*.pid' /proc/3468251/root//./ /var/tmp/vzdumptmp1551178_106' failed: exit code 23

108: 2023-01-02 12:15:42 INFO: Starting Backup of VM 108 (lxc)
108: 2023-01-02 12:15:42 INFO: status = running
108: 2023-01-02 12:15:42 INFO: backup mode: suspend
108: 2023-01-02 12:15:42 INFO: ionice priority: 7
108: 2023-01-02 12:15:42 INFO: CT Name: stephan-plex
108: 2023-01-02 12:15:42 INFO: including mount point rootfs ('/') in backup
108: 2023-01-02 12:15:42 INFO: starting first sync /proc/24013/root/ to /var/tmp/vzdumptmp1551178_108
108: 2023-01-02 12:52:56 INFO: first sync finished - transferred 181.80G bytes in 2234s
108: 2023-01-02 12:52:56 INFO: suspending guest
108: 2023-01-02 12:52:56 INFO: starting final sync /proc/24013/root/ to /var/tmp/vzdumptmp1551178_108
108: 2023-01-02 12:53:21 INFO: final sync finished - transferred 7.15M bytes in 25s
108: 2023-01-02 12:53:21 INFO: resuming guest
108: 2023-01-02 12:53:21 INFO: guest is online again after 25 seconds
108: 2023-01-02 12:53:21 INFO: creating vzdump archive '/mnt/pve/storagebox/dump/vzdump-lxc-108-2023_01_02-12_15_42.tar.zst'
108: 2023-01-02 13:32:30 INFO: Total bytes written: 181692794880 (170GiB, 74MiB/s)
108: 2023-01-02 13:32:33 INFO: zstd: /*stdout*\: Input/output error
108: 2023-01-02 13:33:23 ERROR: Backup of VM 108 failed - command 'set -o pipefail && lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- tar cpf - --totals --one-file-system -p --sparse --numeric-owner --acls --xattrs '--xattrs-include=user.*' '--xattrs-include=security.capability' '--warning=no-file-ignored' '--warning=no-xattr-write' --one-file-system '--warning=no-file-ignored' '--directory=/var/tmp/vzdumptmp1551178_108' ./etc/vzdump/pct.conf ./etc/vzdump/pct.fw '--directory=/var/tmp/vzdumptmp1551178_108' --no-anchored '--exclude=lost+found' --anchored '--exclude=./tmp/?*' '--exclude=./var/tmp/?*' '--exclude=./var/run/?*.pid' . | zstd --rsyncable '--threads=1' >/mnt/pve/storagebox/dump/vzdump-lxc-108-2023_01_02-12_15_42.tar.dat' failed: exit code 1

Can somebody can give a hint How I'm able to debug it?

Cheers,
Gamie
 
Most likely there is a permission problem for some files.
Are the filesystem permissions on the storage box configured correctly?
 
Well, I can'T configure any permissions on that storage box. I get the credentials which got full access.
 
Try setting a "tmpdir" with 777 rights (for example "/tmp") in "/etc/vzdump.conf". Otherwise UID 0 and 100000 need read/write access on that SMB share to be able to backup unprivileged LXCs.
 
  • Like
Reactions: keeka
Dunuin said:
Try setting a "tmpdir" with 777 rights (for example "/tmp") in "/etc/vzdump.conf". Otherwise UID 0 and 100000 need read/write access on that SMB share to be able to backup unprivileged LXCs.
Click to expand...

Hmm, didn't worked.

I created /tmp/backup with 777 and run another backup. Thats the result:


Code: 
109: 2023-01-09 13:35:56 INFO: Starting Backup of VM 109 (lxc)
109: 2023-01-09 13:35:56 INFO: status = running
109: 2023-01-09 13:35:56 INFO: CT Name: stephan-websites
109: 2023-01-09 13:35:56 INFO: including mount point rootfs ('/') in backup
109: 2023-01-09 13:35:56 INFO: backup mode: snapshot
109: 2023-01-09 13:35:56 INFO: ionice priority: 7
109: 2023-01-09 13:35:56 INFO: create storage snapshot 'vzdump'
109: 2023-01-09 13:35:56 INFO: creating vzdump archive '/mnt/pve/storagebox/dump/vzdump-lxc-109-2023_01_09-13_35_56.tar.zst'
109: 2023-01-09 14:07:33 INFO: Total bytes written: 43113687040 (41GiB, 22MiB/s)
109: 2023-01-09 14:07:34 INFO: zstd: /*stdout*\: Input/output error
109: 2023-01-09 14:07:35 INFO: cleanup temporary 'vzdump' snapshot
109: 2023-01-09 14:07:36 ERROR: Backup of VM 109 failed - command 'set -o pipefail && lxc-usernsexec -m u:0:100000:65536 -m g:0:100000:65536 -- tar cpf - --totals --one-file-system -p --sparse --numeric-owner --acls --xattrs '--xattrs-include=user.*' '--xattrs-include=security.capability' '--warning=no-file-ignored' '--warning=no-xattr-write' --one-file-system '--warning=no-file-ignored' '--directory=/tmp/backup/vzdumptmp4140504_109/' ./etc/vzdump/pct.conf ./etc/vzdump/pct.fw '--directory=/mnt/vzsnap0' --no-anchored '--exclude=lost+found' --anchored '--exclude=./tmp/?*' '--exclude=./var/tmp/?*' '--exclude=./var/run/?*.pid' ./ | zstd --rsyncable '--threads=1' >/mnt/pve/storagebox/dump/vzdump-lxc-109-2023_01_09-13_35_56.tar.dat' failed: exit code 1
 
Hmm, I tried then with /tmp
But still no success with the Backup. Any other Suggestions or where I'm able to debug even more?
 
Please provide the output of cat /etc/pve/storage.cfg, df -h and mount.
 
mira said:
Please provide the output of cat /etc/pve/storage.cfg, df -h and mount.
Click to expand...
Code: 
dir: local
        path /var/lib/vz
        content backup,vztmpl,iso

zfspool: local-zfs
        pool rpool/data
        content images,rootdir
        sparse 1

zfspool: ssdpool
        pool ssdpool
        content rootdir,images
        mountpoint /ssdpool
        nodes proxmox

dir: BigStorage
        path /mnt/pve/bigstoragebox
        content backup
        prune-backups keep-all=1
        shared 0

Code: 
Filesystem                           Size  Used Avail Use% Mounted on
udev                                  32G     0   32G   0% /dev
tmpfs                                6.3G  1.8M  6.3G   1% /run
rpool/ROOT/pve-1                     7.2T  8.2G  7.2T   1% /
tmpfs                                 32G   49M   32G   1% /dev/shm
tmpfs                                5.0M     0  5.0M   0% /run/lock
rpool                                7.2T  128K  7.2T   1% /rpool
rpool/ROOT                           7.2T  128K  7.2T   1% /rpool/ROOT
rpool/data                           7.2T  256K  7.2T   1% /rpool/data
/dev/fuse                            128M   36K  128M   1% /etc/pve
ssdpool                              545G  128K  545G   1% /ssdpool
rpool/data/subvol-100-disk-0          25G  1.2G   24G   5% /rpool/data/subvol-100-disk-0
rpool/data/subvol-102-disk-0          25G  1.5G   24G   6% /rpool/data/subvol-102-disk-0
rpool/data/subvol-198-disk-0          55G  380M   55G   1% /rpool/data/subvol-198-disk-0
ssdpool/subvol-103-disk-0             25G   13G   13G  51% /ssdpool/subvol-103-disk-0
rpool/data/subvol-104-disk-0          25G   11G   15G  43% /rpool/data/subvol-104-disk-0
rpool/data/subvol-105-disk-0         2.3T  1.7T  610G  74% /rpool/data/subvol-105-disk-0
rpool/data/subvol-106-disk-0         1.2T  328G  823G  29% /rpool/data/subvol-106-disk-0
rpool/data/subvol-107-disk-0          50G  9.3G   41G  19% /rpool/data/subvol-107-disk-0
rpool/data/subvol-108-disk-0         200G  169G   32G  85% /rpool/data/subvol-108-disk-0
rpool/data/subvol-109-disk-0         100G   24G   77G  24% /rpool/data/subvol-109-disk-0
ssdpool/subvol-110-disk-0             55G  4.5G   51G   9% /ssdpool/subvol-110-disk-0
//u32211.your-storagebox.de/backup  5.0T  813G  4.3T  16% /mnt/pve/bigstoragebox
tmpfs                                6.3G     0  6.3G   0% /run/user/0

Code: 
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=32854168k,nr_inodes=8213542,mode=755,inode64)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,noexec,relatime,size=6577532k,mode=755,inode64)
rpool/ROOT/pve-1 on / type zfs (rw,relatime,xattr,noacl)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,inode64)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k,inode64)
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
bpf on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=30,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=21416)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
tracefs on /sys/kernel/tracing type tracefs (rw,nosuid,nodev,noexec,relatime)
sunrpc on /run/rpc_pipefs type rpc_pipefs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
rpool on /rpool type zfs (rw,relatime,xattr,noacl)
rpool/ROOT on /rpool/ROOT type zfs (rw,relatime,xattr,noacl)
rpool/data on /rpool/data type zfs (rw,relatime,xattr,noacl)
lxcfs on /var/lib/lxcfs type fuse.lxcfs (rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other)
/dev/fuse on /etc/pve type fuse (rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other)
ssdpool on /ssdpool type zfs (rw,xattr,noacl)
rpool/data/subvol-100-disk-0 on /rpool/data/subvol-100-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-102-disk-0 on /rpool/data/subvol-102-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-198-disk-0 on /rpool/data/subvol-198-disk-0 type zfs (rw,relatime,xattr,posixacl)
ssdpool/subvol-103-disk-0 on /ssdpool/subvol-103-disk-0 type zfs (rw,xattr,posixacl)
rpool/data/subvol-104-disk-0 on /rpool/data/subvol-104-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-105-disk-0 on /rpool/data/subvol-105-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-106-disk-0 on /rpool/data/subvol-106-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-107-disk-0 on /rpool/data/subvol-107-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-108-disk-0 on /rpool/data/subvol-108-disk-0 type zfs (rw,relatime,xattr,posixacl)
rpool/data/subvol-109-disk-0 on /rpool/data/subvol-109-disk-0 type zfs (rw,relatime,xattr,posixacl)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
ssdpool/subvol-110-disk-0 on /ssdpool/subvol-110-disk-0 type zfs (rw,xattr,posixacl)
//u32211.your-storagebox.de/backup on /mnt/pve/bigstoragebox type cifs (rw,relatime,vers=3.1.1,cache=strict,username=u32211,uid=0,noforceuid,gid=0,noforcegid,addr=116.202.54.30,file_mode=0755,dir_mode=0755,iocharset=utf8,soft,nounix,serverino,mapposix,noperm,rsize=4194304,wsize=4194304,bsize=1048576,echo_interval=60,actimeo=1)
tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=6577528k,nr_inodes=1644382,mode=700,inode64)
 
Last edited:
Is there anything in the journal during the time the backup runs and fails?
Any issues with the network storage during that time?

Looks like we had a few reports together with Hetzner's storage boxes.
 
Last edited:
Not really, because it instant fails. Which journals do you exactly mean?

Weirdly I was now able to make sometimes backups with a weird setup.

I ordered a VM on Hetzner, installed on it Debian 11 and Proxmox Backup Server. Mounting it via CIFS and that mountoptions makes it possible to make a backup, but really slowly and successrate 90%. But that was just to test if there is any possibility to mount CIFS and backup LXC. Without the additional VM would be great :p
 
It would seem those issues appear when the backup storage is too slow, which doesn't surprise me when it comes to Hetzner.
PBS seems to be a bit more resilient in this case, but still network storages should never lose the connection since both CIFS and NFS can't handle this all to well.
 
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