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I think you might be able to get away with just calling os-brick's
connect_volume again without the need to call disconnect_volume first.
 calling disconnect_volume wouldn't be good for volumes that are being
used, just to refresh the connection_info on that volume.

On Tue, Feb 27, 2018 at 2:56 PM, Matt Riedemann <mriedemos at gmail.com> wrote:

> On 2/27/2018 10:02 AM, Matthew Booth wrote:
>
>> Sounds like the work Nova will have to do is identical to volume update
>> (swap volume). i.e. Change where a disk's backing store is without actually
>> changing the disk.
>>
>
> That's not what I'm hearing. I'm hearing disconnect/reconnect. Only the
> libvirt driver supports swap volume, but I assume all other virt drivers
> could support this generically.
>
>
>> Multi-attach! There might be more than 1 instance per volume, and we
>> can't currently support volume update for multi-attached volumes.
>>
>
> Good point - cinder would likely need to reject a request to replicate an
> in-use multiattach volume if the volume has more than one attachment.
>
>
> --
>
> Thanks,
>
> Matt
>
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