Re: [Engine-devel] move disk command
On 01/16/2012 02:26 PM, Ayal Baron wrote:
----- Original Message -----
> On 01/16/2012 05:26 PM, Jon Choate wrote:
>> As part of the multiple storage domains feature there will be new
>> functionality added to allow users to move individual disks.
>>
>> What are the prerequisites for moving a disk?
>>
>> 1) the disk must exist
>> 2) the associated VM must be down
> this can't just be a CanDoAction check - the lock has to be real to
> prevent a race from starting the VM after the validation.
>
Either down or disk is unplugged.
>> 3) the associated VM must not be locked
>> 4) the source storage domain must exist
>> 5) the source storage domain must be available
>> 6) the target domain must exist
>> 7) the target domain must be available
>> 8) the target domain must have adequate disk space
>> 9) the target domain cannot be an ISO or export domain
>> 10) the source domain cannot be an ISO or export domain
This may be unrelated, but user would be allowed to export and import a floating disk,
right?
I would like the ability to import *any* disk in the export domain as a floating disk,
but in the least, export and import disks not associated with a VM.
This was not in
scope for the work I am currently doing. If this is
something desirable I think it needs to be prioritized and worked in at
a later time. If it does need to happen now then we are going to need
to be able to do full crud for a floating disk I would think.
> user must provide same/other quota for the target domain which
has
> enough quota left for the requested size.
>
>> What am I missing?
>>
>> Also, should we allow the moving of a template disk that has VM
>> disks based on it? Unless I'm wrong this would require all of the
>> disks based on the template to be moved as well.
> I'd say no. you can only move a template disk if it is not used.
> I'd go further and say one should copy the template disk and delete,
> rather than support move for it at all (not relevant for VM disk,
> since
> we don't have the same concept of multiple copies for it).
As long as you can delete a copy of the disk from a domain where there are no VM disks
derived from it.
>> thoughts?
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