Unable to backup to disk

[powersupport]

Hi Team,

We are getting backup failure, the error message is
ERROR: VM 158 qmp command 'backup' failed - backup connect failed: command error: unable to create backup group "/datastore/inpx/vm/158" - Permission denied (os error 13)
INFO: aborting backup job

Please advice us to resolve this issue

 

[Hannes Laimer]

Hey,

could you post the output of

ls -lah /datastore
ls -lah /datastore/inpx
ls -lah /datastore/inpx/vm
ls -lah /datastore/inpx/vm/158

 

[powersupport]

Hi,

Here is the output; please check:

ls -lah /datastore
root@px-sg1-bu3:~# ls -lah /datastore
total 28K
drwxr-xr-x 7 root root 4.0K Sep 19 2023 .
drwxr-xr-x 19 root root 4.0K Oct 14 2022 ..
drwxr-xr-x 4 backup backup 4.0K Jun 7 00:05 inpx
drwxr-xr-x 3 backup backup 4.0K Aug 17 2023 maintanance
drwxr-xr-x 4 backup backup 4.0K Jun 7 00:15 maintanance-sg2
drwxr-xr-x 4 backup backup 4.0K Jun 7 00:27 satapx
drwxr-xr-x 4 backup backup 4.0K Jun 7 00:14 tkpx-sg1


ls -lah /datastore/inpx
root@px-sg1-bu3:~# ls -lah /datastore/inpx
total 1.1M
drwxr-xr-x 4 backup backup 4.0K Jun 7 00:05 .
drwxr-xr-x 7 root root 4.0K Sep 19 2023 ..
drwxr-x--- 1 backup backup 1.1M Jun 27 2023 .chunks
-rw-r--r-- 1 backup backup 286 Jun 7 00:05 .gc-status
-rw-r--r-- 1 backup backup 0 Jun 27 2023 .lock
drwxr-xr-x 3 root root 4.0K Jun 27 2023 vm


ls -lah /datastore/inpx/vm
root@px-sg1-bu3:~# ls -lah /datastore/inpx/vm
total 12K
drwxr-xr-x 3 root root 4.0K Jun 27 2023 .
drwxr-xr-x 4 backup backup 4.0K Jun 7 00:05 ..
drwxr-xr-x 11 backup backup 4.0K Jun 27 2023 103


ls -lah /datastore/inpx/vm/158
root@px-sg1-bu3:~#[B] [/B]ls -lah /datastore/inpx/vm/158
ls: cannot access '/datastore/inpx/vm/158': No such file or directory


Please advice us to resolve this issue

Thank you

 

[Hannes Laimer]

drwxr-xr-x 3 root   root   4.0K Jun 27  2023 vm

/datastore/inpx/vm seems to be owned by root, but the backup user should be the owner. Did you manually copy or move things around lately?

chown -R backup:backup /datastore/inpx should solve the problem.

 

[powersupport]

We have run the command chown -R backup:backup /datastore/inpx,

but the backup is still not working, and the same error persists.

Could you please help resolve this issue?

Thank you.

 

[UdoB]

Good morning. May be you are under pressure, but... this is a user supported forum. We (you) do not pay for support. For professional support you may look at https://shop.proxmox.com/index.php?rp=/store/proxmox-ve-standard

I am with @Hannes Laimer in #4. After "chown", did the owner change to "backup" in ls -lah /datastore/inpx? (You didn't show the output...)

Then please post the complete output of that failing backup task.

Best regards

 

[powersupport]

Here is the results of it

root@px-sg1-bu3:~# ls -lah /datastore/inpx
total 1.1M
drwxr-xr-x 4 backup backup 4.0K Jun 9 00:03 .
drwxr-xr-x 7 root root 4.0K Sep 19 2023 ..
drwxr-x--- 1 backup backup 1.1M Jun 27 2023 .chunks
-rw-r--r-- 1 backup backup 286 Jun 9 00:03 .gc-status
-rw-r--r-- 1 backup backup 0 Jun 27 2023 .lock
drwxr-xr-x 18 backup backup 4.0K Jun 9 00:00 vm


Then here is the complete output of falling backup task


Task viewer: VM/CT 105 - Backup

OutputStatus

Stop

Download
INFO: starting new backup job: vzdump 105 --remove 0 --node inpx-sg1-n1 --storage bu3 --mode snapshot --notification-mode auto --notes-template '{{guestname}}'
INFO: Starting Backup of VM 105 (qemu)
INFO: Backup started at 2024-06-09 16:03:26
INFO: status = running
INFO: VM Name: SuperScaler
INFO: include disk 'scsi0' 'Inpx-storage:vm-105-disk-0' 200G
INFO: backup mode: snapshot
INFO: ionice priority: 7
INFO: snapshots found (not included into backup)
INFO: creating Proxmox Backup Server archive 'vm/105/2024-06-09T08:03:26Z'
ERROR: VM 105 qmp command 'backup' failed - backup register image failed: command error: inserting chunk on store 'inpx' failed for bb9f8df61474d25e71fa00722318cd387396ca1736605e1248821cc0de3d3af8 - mkstemp "/datastore/inpx/.chunks/bb9f/bb9f8df61474d25e71fa00722318cd387396ca1736605e1248821cc0de3d3af8.tmp_XXXXXX" failed: ENOENT: No such file or directory
INFO: aborting backup job
INFO: resuming VM again
ERROR: Backup of VM 105 failed - VM 105 qmp command 'backup' failed - backup register image failed: command error: inserting chunk on store 'inpx' failed for bb9f8df61474d25e71fa00722318cd387396ca1736605e1248821cc0de3d3af8 - mkstemp "/datastore/inpx/.chunks/bb9f/bb9f8df61474d25e71fa00722318cd387396ca1736605e1248821cc0de3d3af8.tmp_XXXXXX" failed: ENOENT: No such file or directory
INFO: Failed at 2024-06-09 16:03:26
INFO: Backup job finished with errors
INFO: notified via target `mail-to-root`
TASK ERROR: job errors

 

[UdoB]

ERROR: Backup of VM 105 failed - VM 105 qmp command 'backup' failed - backup register image failed: command error: inserting chunk on store 'inpx' failed for bb9f8df61474d25e71fa00722318cd387396ca1736605e1248821cc0de3d3af8 - mkstemp "/datastore/inpx/.chunks/bb9f/bb9f8df61474d25e71fa00722318cd387396ca1736605e1248821cc0de3d3af8.tmp_XXXXXX" failed: ENOENT: No such file or directory

Well, unfortunately I am not sure what this means. If it was me I would run a Prune and a Garbage Collection from PBS - even though this probably won't help.

Does the folder "inpx/.chunks/bb9f/" exist? As far as I know it should have been created when the datastore was initialized. But then there was this "wrong owner" problem...? "ls .chunks/" should list 65536 folders owned by "backup:backup" - as you already did the "chown -R" thing...

If the datastore is empty you might go back to square one, formally remove that datastore in PBS and recreate it.

Perhaps some else has a better idea on how to proceed, sorry.

Edit/PS: please use [CODE]...[/CODE]-Tags for better readability.