[openstack-dev] [cinder][nova] Update attachments on replication failover
Matt Riedemann
mriedemos at gmail.com
Tue Feb 27 14:56:56 UTC 2018
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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