CT backup to PBS failed

[chengkinhung]

Hi every one, I just encounter backup job failed issues, one of my CT backup to PBS failed since from several days ago. Today I run the backup manually for this CT but also failed, and I notice there is error messages:

INFO: catalog upload error - channel closed
INFO: Error: error at "var/cache/dnf/PLESK_18_0_29-extras-8900ed0228147993/repodata/5b7bdca34c2c063ccddb16a03c4b8cb71643360d1d755ffb03e3b696d6077c92-primary.xml.gz": failed to read xattrs: E2BIG: Argument list too long


Here is my full backup log:

INFO: starting new backup job: vzdump 118 --node NODE3 --mode snapshot --remove 0 --storage backup
INFO: Starting Backup of VM 118 (lxc)
INFO: Backup started at 2021-04-09 20:47:45
INFO: status = running
INFO: CT Name: myserver.com-180.149.253.252
INFO: including mount point rootfs ('/') in backup
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: create storage snapshot 'vzdump'
INFO: creating Proxmox Backup Server archive 'ct/118/2021-04-09T12:47:45Z'
INFO: run: /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp26837_118/etc/vzdump/pct.conf fw.conf:/var/tmp/vzdumptmp26837_118/etc/vzdump/pct.fw root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --exclude=/tmp/?* --exclude=/var/tmp/?* --exclude=/var/run/?*.pid --backup-type ct --backup-id 118 --backup-time 1617972465 --repository admin@pbs@x.x.x.x:backup
INFO: Starting backup: ct/118/2021-04-09T12:47:45Z
INFO: Client name: NODE3
INFO: Starting backup protocol: Fri Apr  9 20:47:46 2021
INFO: Downloading previous manifest (Sat Mar 27 04:46:23 2021)
INFO: Upload config file '/var/tmp/vzdumptmp26837_118/etc/vzdump/pct.conf' to 'admin@pbs@x.x.x.x:8007:backup' as pct.conf.blob
INFO: Upload config file '/var/tmp/vzdumptmp26837_118/etc/vzdump/pct.fw' to 'admin@pbs@x.x.x.x:8007:backup' as fw.conf.blob
INFO: Upload directory '/mnt/vzsnap0' to 'admin@pbs@x.x.x.x:8007:backup' as root.pxar.didx
INFO: catalog upload error - channel closed
INFO: Error: error at "var/cache/dnf/PLESK_18_0_29-extras-8900ed0228147993/repodata/5b7bdca34c2c063ccddb16a03c4b8cb71643360d1d755ffb03e3b696d6077c92-primary.xml.gz": failed to read xattrs: E2BIG: Argument list too long
INFO: cleanup temporary 'vzdump' snapshot
ERROR: Backup of VM 118 failed - command '/usr/bin/proxmox-backup-client backup '--crypt-mode=none' pct.conf:/var/tmp/vzdumptmp26837_118/etc/vzdump/pct.conf fw.conf:/var/tmp/vzdumptmp26837_118/etc/vzdump/pct.fw root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found '--exclude=/tmp/?*' '--exclude=/var/tmp/?*' '--exclude=/var/run/?*.pid' --backup-type ct --backup-id 118 --backup-time 1617972465 --repository admin@pbs@x.x.x.x:backup' failed: exit code 255
INFO: Failed at 2021-04-09 20:53:51
INFO: Backup job finished with errors
TASK ERROR: job erro

# pveversion -v

proxmox-ve: 6.3-1 (running kernel: 5.4.106-1-pve)
pve-manager: 6.3-6 (running version: 6.3-6/2184247e)
pve-kernel-5.4: 6.3-8
pve-kernel-helper: 6.3-8
pve-kernel-5.4.106-1-pve: 5.4.106-1
pve-kernel-5.4.103-1-pve: 5.4.103-1
pve-kernel-5.4.98-1-pve: 5.4.98-1
pve-kernel-5.4.78-2-pve: 5.4.78-2
pve-kernel-5.4.78-1-pve: 5.4.78-1
pve-kernel-5.4.73-1-pve: 5.4.73-1
pve-kernel-5.4.65-1-pve: 5.4.65-1
pve-kernel-5.4.60-1-pve: 5.4.60-2
pve-kernel-5.4.55-1-pve: 5.4.55-1
pve-kernel-5.4.44-2-pve: 5.4.44-2
pve-kernel-5.4.34-1-pve: 5.4.34-2
ceph-fuse: 12.2.11+dfsg1-2.1+b1
corosync: 3.1.0-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown: residual config
ifupdown2: 3.0.0-1+pve3
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.20-pve1
libproxmox-acme-perl: 1.0.8
libproxmox-backup-qemu0: 1.0.3-1
libpve-access-control: 6.1-3
libpve-apiclient-perl: 3.1-3
libpve-common-perl: 6.3-5
libpve-guest-common-perl: 3.1-5
libpve-http-server-perl: 3.1-1
libpve-storage-perl: 6.3-8
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.6-2
lxcfs: 4.0.6-pve1
novnc-pve: 1.1.0-1
proxmox-backup-client: 1.0.13-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.4-9
pve-cluster: 6.2-1
pve-container: 3.3-4
pve-docs: 6.3-1
pve-edk2-firmware: 2.20200531-1
pve-firewall: 4.1-3
pve-firmware: 3.2-2
pve-ha-manager: 3.1-1
pve-i18n: 2.3-1
pve-qemu-kvm: 5.2.0-5
pve-xtermjs: 4.7.0-3
qemu-server: 6.3-10
smartmontools: 7.2-pve2
spiceterm: 3.1-1
vncterm: 1.6-2
zfsutils-linux: 2.0.4-pve1

 

[dcsapak]

according to man flistxattr(2):

BUGS
As noted in xattr(7), the VFS imposes a limit of 64 kB on the size of the extended attribute name list returned by listxattr(7). If
the total size of attribute names attached to a file exceeds this limit, it is no longer possible to retrieve the list of attribute
names.

so it seems the xattrs of that file are too big to list, so we cannot back them up...

 

[chengkinhung]

@dcsapak

Thank you.