Comment 5 for bug 1939389

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Gabriel Samfira (gabriel-samfira) wrote : Re: Missing [nova] section in cinder.conf

Hi Samuel,

The volume needs to be "in-use". I see you are resetting it's state to "available". When in-use, cinder will attempt to notify nova to refresh the size of the disk. See:

https://github.com/openstack/cinder/blob/master/cinder/volume/manager.py#L2939-L2943

On iSCSI backends the volume needs to first be refreshed on the host before the VM can be made aware of the new size. I suspect there may be some operation that needs to be done on RBD backends as well, but I cannot say for sure.

To reproduce, I recommend you use any iSCSI backend. We used a Dell Unity, but any iSCSI backend will do.