Open Stack

Hello.
When I try to create backup:
nova backup testdeb testdeb_bak daily 2
nova-api said:
==> nova/nova-api.log <==
2016-04-21 16:40:14.828 2814 INFO nova.compute.api [req-e89878e7-9d26-4e6e-8922-8aa9bba56b72 8d384cc45d0c467eb46ef3f980cf314d 3029462986ac400ca2c2c6ac4c9af5a7 - - -] [instance: a962f06b-052d-4df8-afbb-5d0e6581eb92] It's not supported to backup volume backed instance.
I have 2 ceph cluster: 1st for instances, 2nd for backup (connected via cinder-backup daemon).
But I can successfully create backup using cinder backup-create --force
why I can't make a backup via nova backup?


-- 
K K
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