Re: [Engine-devel] VM Payload feature

On 02/27/2012 09:14 PM, David Lutterkort wrote: > On Mon, 2012-02-27 at 18:22 +0200, Itamar Heim wrote: >> On 02/27/2012 05:45 PM, Dan Kenigsberg wrote: >>> On Mon, Feb 27, 2012 at 04:19:02PM +0200, Shahar Havivi wrote: >>>> >>> Let's re-ask the question about the (Engine) API: Do we need the payload >>> to be passed on VM definition? Or is it enough to pass it on VM startup? >> >> my view is vm definition, not only startup. > > For a cloud, you generally want to launch multiple VM's off the same > image, and therefore need to be able to specify the user data for each > VM. Whether that happens when you define or launch the VM isn't all that > important, though it would be a little friendlier to users to do it at > VM start, since they then do not need to have the user data ready (or > know it) when they define a VM. well, true for cloud when image start is also creating the instance, while in ovirt, at least for now, you need to create the VM then launch it. i agree you need to be able to pass this at VM start, but considering VM are mostly stateful, i don't see why you wouldn't let user persist this like the VM is presistent.