Hi, Forgot to mention, indeed we configured extra_specs: volume_backend_name. The problem is that a volume of this type can get scheduled on a node where c-vol is not configured with this backend.
F.e.: I have 3 storage nodes (c-vol) and two have the driver configured, the third one doesn't have it; when i try to create a volume of this type, sometimes the c-vol on third node gets the call, and it fails because the driver is not configured. Maybe we didn't configure something properly, i tried looking at c-sch but i can't figure out why the third node got chosen. Thanks, Eduard
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