Open Stack

Adding Helen Walsh to this as she may be able to provide insight.

Jay

On 2/5/2019 12:16 PM, Martin Chlumsky wrote:
> Hello,
>
> We are using EMC ScaleIO as our backend to cinder.
> When we delete VMs that have attached volumes and then try deleting 
> said volumes, the volumes will sometimes end in state error_deleting. 
> The state is reached because for some reason the volumes are still 
> mapped (in the ScaleIO sense of the word) to the hypervisor despite 
> the VM being deleted.
> We fixed the issue by setting the following option to True in cinder.conf:
>
> # Unmap volume before deletion. (boolean value)
> sio_unmap_volume_before_deletion=False
>
>
> What is the reasoning behind this option? Why would we ever set this 
> to False and why is it False by default? It seems you would always 
> want to unmap the volume from the hypervisor before deleting it.
>
> Thank you,
>
> Martin