[Engine-devel] VNIC profiles

[Livnat Peer]

Hi,

We are working on adding VNIC profiles as part of the work to add VNIC QoS.

http://www.ovirt.org/Features/Network_QoS#VNIC_Profiles

We need to define some of the system behavior followed by this change,
here is my take -

Editing a profile -
--------------------
A user should be able to edit the profile properties (including profile
name) while VMs are attached and are using this Profile (reference
should be done by id).

Changing the network though is a bit more tricky as long as we don't
have a way to distinguish between running and current configurations I
think it could be very confusing to the user. Especially since we
support dynamic wiring so the behavior IMO is unpredictable.
I think it should be blocked at this point.


Edit a VNIC / change a VNIC profile -
------------------------------------
Changing the profile a VM is using while the VM is running should behave
like dynamic wiring (changing the VM network while it is running).


Remove a Profile -
-------------------
Is only valid if all VMs that are using this profile are in status down.
It should update all VMs to point to no profile which should behave like
none network today.

I see no reason to support a profile on a none network at this point.

The above is also relevant for upgrade flow (upgrading none network to
point to no profile)


Removing a Network -
----------------------
should remove all profiles on that network


VM snapshot/import/export -
--------------------------
We should handle VMs that are pointing to a network directly for b/w
compatibility.
we need to select first profile that is on that network that the user
has permissions on.


I assume there are more, comments are welcome

Thanks, Livnat