goodmorning,

 using kolla-openstack zed cluster, cinder backend is nfs, cinder-backup is another nfs too.

when i try to do backup:

#openstack volume backup create 43e97a6d-c965-4127-8334-df5b5e8e8a05

(on cinder-backup container)

(/var/log/cinder-backup.log)

"

ERROR oslo_messaging.rpc.server Command: sudo cinder-rootwrap /etc/cinder/rootwrap.conf chown 42407 /var/lib/cinder/mnt/6c827b655049ba4f069fd5f103620555/volume-20f3c72c-0b57-4500-b552-5056d12fd9c7
2023-05-31 12:37:37.551 7 ERROR oslo_messaging.rpc.server Exit code: 1
2023-05-31 12:37:37.551 7 ERROR oslo_messaging.rpc.server Stdout: ''
2023-05-31 12:37:37.551 7 ERROR oslo_messaging.rpc.server Stderr: "/bin/chown: changing ownership of '/var/lib/cinder/mnt/6c827b655049ba4f069fd5f103620555/volume-20f3c72c-0b57-4500-b552-5056d12fd9c7': Invalid argument\n"
2023-05-31 12:37:37.551 7 ERROR oslo_messaging.rpc.server

"

could anyone give me advice how to proceed?

thank you for your time.