[Engine-devel] VM disks

[Yaniv Kaul]

On 02/18/2012 07:07 PM, Livnat Peer wrote:
> Hi,
>
> These days we are working on various features around VM disks, in the
> different threads it was decided that we'll have the ability to attach a
> disk to a VM but it will be added as inactive, then the user can
> activate it for it to be accessible from within the guest.
>
> Flow of adding a new disk would be:
> - creating the disk
> - attaching the disk to the VM
> - activating it
>
> Flow of adding a shared disk (or any other existing disk):
> - attach the disk
> - activate it
>
> It seems to me a lot like adding a storage domain and I remember a lot
> of rejections on the storage domain flow (mostly about it being too
> cumbersome).
> After discussing the issue with various people we could not find a good
> reason for having a VM disk in attached but inactive mode.

And since you probably can't find a good reason to have two steps for 
storage domain, lets fix this as well.
(Downstream RFE https://bugzilla.redhat.com/show_bug.cgi?id=567585 - 
discuss only the export domain, but I'm quite sure it's applicable to 
other domains as well)
Y.

>
> Of course we can wrap the above steps in one step for specific flows
> (add+attach within a VM context for example) but can anyone think on a
> good reason to support attached but inactive disk?
>
> I would suggest that when attaching a disk to a VM it becomes part of
> the VM (active) like in 'real' machines.
>
>
> Thank you, Livnat
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