Error on VM backup

Hi,

I followed the instructions to create a rsync backup datastore. The rsync server is ready and the user oneadmin from the front-end and hypervisors can SSH without password. I have also created the backup datastore. When I try to do a backup, this error appears:

Fri Jan 10 10:25:03 2025 [Z0][VM][I]: New LCM state is BACKUP
Fri Jan 10 10:27:25 2025 [Z0][VMM][I]: Successfully execute transfer manager driver operation: prebackup_live.
Fri Jan 10 10:27:26 2025 [Z0][VMM][I]: Command execution failed (exit code: 255): /var/lib/one/remotes/datastore/rsync/backup node030:/var/lib/one//datastores/0/341 0: 569559c5-4f5c-4f15-bdf9-04b4610b63ab 341 0
Fri Jan 10 10:27:26 2025 [Z0][VMM][E]: make_dst_path: Command failed:
Fri Jan 10 10:27:26 2025 [Z0][VMM][I]: export LANG=C
Fri Jan 10 10:27:26 2025 [Z0][VMM][I]: export LC_ALL=C
Fri Jan 10 10:27:26 2025 [Z0][VMM][I]: mkdir -p /var/lib/one/datastores/103/341/9214a5/
Fri Jan 10 10:27:26 2025 [Z0][VMM][I]: Error:
Fri Jan 10 10:27:28 2025 [Z0][VMM][I]: Successfully execute transfer manager driver operation: postbackup_live.
Fri Jan 10 10:27:28 2025 [Z0][VMM][I]: Failed to execute  operation: backup.
Fri Jan 10 10:27:28 2025 [Z0][VMM][E]: BACKUP: ERROR: make_dst_path: Command failed: export LANG=C export LC_ALL=C mkdir -p /var/lib/one/datastores/103/341/9214a5/ Error:
Fri Jan 10 10:27:28 2025 [Z0][VM][I]: New LCM state is RUNNING

It seems that it can not create the remote folder. However, manually doing a SSH with the user oneadmin and executing the mkdir works fine.

Any idea what could be the problem?

OpenNebula is version 6.6.0.

Thanks!

Backups were introduced with the 6.6 release. There have been a lot of fixes and improvements to it since then. Please try the backups with OpenNebula 6.10 instead. Version 6.6 is no longer supported.