[SOLVED] lxc backup fail dmesg info

[RobFantini]

Hello, for lxc to pbs or local vzdump we get frequent fails on busy systems.

### from email
  606: 2020-11-01 19:57:16 INFO: Starting Backup of VM 606 (lxc)
  606: 2020-11-01 19:57:16 INFO: status = running
  606: 2020-11-01 19:57:16 INFO: CT Name: bc-sys6-buster
  606: 2020-11-01 19:57:16 INFO: including mount point rootfs ('/') in backup
  606: 2020-11-01 19:57:16 INFO: excluding volume mount point mp1 ('/var/lib/bluecherry/recordings') from backup (disabled)
  606: 2020-11-01 19:57:16 INFO: backup mode: snapshot
  606: 2020-11-01 19:57:16 INFO: ionice priority: 5
  606: 2020-11-01 19:57:16 INFO: create storage snapshot 'vzdump'
  606: 2020-11-01 19:57:17 INFO: creating Proxmox Backup Server archive 'ct/606/2020-11-02T00:57:16Z'
  606: 2020-11-01 19:57:17 INFO: run: /usr/bin/proxmox-backup-client backup --crypt-mode=none pct.conf:/var/tmp/vzdumptmp1338017/etc/vzdump/pct.conf
root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --backup-type ct --backup-id 606 --backup-time 1604278636 --repository
pbs-user@pbs@10.11.12.80:daily
  606: 2020-11-01 19:57:17 INFO: Starting backup: ct/606/2020-11-02T00:57:16Z
  606: 2020-11-01 19:57:17 INFO: Client name: pve2
  606: 2020-11-01 19:57:17 INFO: Starting backup protocol: Sun Nov  1 19:57:17 2020
  606: 2020-11-01 19:57:17 INFO: Upload config file '/var/tmp/vzdumptmp1338017/etc/vzdump/pct.conf' to 'pbs-user@pbs@10.11.12.80:8007:daily' as pct.conf.blob
  606: 2020-11-01 19:57:17 INFO: Upload directory '/mnt/vzsnap0' to 'pbs-user@pbs@10.11.12.80:8007:daily' as root.pxar.didx
  606: 2020-11-01 19:58:19 INFO: catalog upload error - channel closed
  606: 2020-11-01 19:58:19 INFO: Error: error at "var/lib/php/sessions": stat failed on "var/lib/php/sessions/sess_m7hq0j83d6r2qatjrchr2o7uho": EUCLEAN: Structure
needs cleaning
  606: 2020-11-01 19:58:19 INFO: remove vzdump snapshot
  606: 2020-11-01 19:58:21 ERROR: Backup of VM 606 failed - command '/usr/bin/proxmox-backup-client backup '--crypt-mode=none'
pct.conf:/var/tmp/vzdumptmp1338017/etc/vzdump/pct.conf root.pxar:/mnt/vzsnap0 --include-dev /mnt/vzsnap0/./ --skip-lost-and-found --backup-type ct --backup-id 606
--backup-time 1604278636 --repository pbs-user@pbs@10.11.12.80:daily' failed: exit code 255

dmesg;

[Sun Nov  1 19:56:16 2020] rbd: rbd2: object map is invalid
[Sun Nov  1 19:56:16 2020] rbd: image vm-605-disk-0: object map is invalid
[Sun Nov  1 19:56:16 2020] rbd: rbd4: capacity 8589934592 features 0x1d
[Sun Nov  1 19:56:16 2020] EXT4-fs (rbd4): write access unavailable, skipping orphan cleanup
[Sun Nov  1 19:56:16 2020] EXT4-fs (rbd4): mounted filesystem without journal. Opts: noload
[Sun Nov  1 19:57:15 2020] rbd: rbd2: object map is invalid
[Sun Nov  1 19:57:16 2020] rbd: rbd0: object map is invalid
[Sun Nov  1 19:57:16 2020] rbd: image vm-606-disk-0: object map is invalid
[Sun Nov  1 19:57:16 2020] rbd: rbd4: capacity 15032385536 features 0x1d
[Sun Nov  1 19:57:16 2020] EXT4-fs (rbd4): write access unavailable, skipping orphan cleanup
[Sun Nov  1 19:57:16 2020] EXT4-fs (rbd4): mounted filesystem without journal. Opts: noload
[Sun Nov  1 19:58:17 2020] EXT4-fs error (device rbd4): ext4_lookup:1705: inode #8372: comm PxarBackupStrea: deleted inode referenced: 2369
[Sun Nov  1 19:58:19 2020] rbd: rbd0: object map is invalid

 

[wolfgang]

Hi,

PBS is in beta state so many bugs and improvements are made in this phase.
To help you please upgrade PVE and PBS test again and if the problem still exists report back.
But if you report an issue please send the used PVE version and also the PBS version with this report.

 

[RobFantini]

we have had zero backup issues since stable.