Open Stack

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