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Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images? |
Date: |
Tue, 29 May 2018 16:31:04 +0100 |
User-agent: |
Mutt/1.9.5 (2018-04-13) |
* Eduardo Habkost (address@hidden) wrote:
> On Tue, May 29, 2018 at 03:03:16PM +0100, Dr. David Alan Gilbert wrote:
> > * Richard W.M. Jones (address@hidden) wrote:
> > > On Fri, May 18, 2018 at 06:09:56PM +0100, Daniel P. Berrangé wrote:
> > > > The closest to a cross-hypervisor standard is OVF which can store
> > > > metadata about required hardware for a VM. I'm pretty sure it does
> > > > not have the concept of machine types, but maybe it has a way for
> > > > people to define metadata extensions. Since it is just XML at the
> > > > end of the day, even if there was nothing official in OVF, it would
> > > > be possible to just define a custom XML namespace and declare a
> > > > schema for that to follow.
> > >
> > > I have a great deal of experience with the OVF "standard".
> > > TL;DR: DO NOT USE IT.
> >
> > In addition to the detail below, from reading DMTF's OVF spec (DSP0243 v
> > 2.1.1) I see absolutely nothing specifying hardware type.
> > Sure it can specify size of storage, number of ether cards, MAC
> > addresses for them etc - but I don't see any where specify the type of
> > emualted system.
>
> Maybe the VirtualHardwareSection/System/vssd:VirtualSystemType
> element could be used for that. (DSP0243 v2.1.1, line 650).
Ah yes, you're right; they hadn't bothered putting that in any of the
examples. A quick search suggests VMWare use that as 'vmx-10' or
'vmx-12' as a 'hardware faimily'.
> But based on Richard's feedback, I think we shouldn't even try to
> use it.
Right; although if we have a key/value system, then if the key/value
structures we used happened to match up with OVMF if they made sense
then I guess it would make conversions easy.
Dave
> --
> Eduardo
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, (continued)
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Michael S. Tsirkin, 2018/05/22
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Kevin Wolf, 2018/05/22
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Eduardo Habkost, 2018/05/22
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Fam Zheng, 2018/05/22
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Kevin Wolf, 2018/05/23
- Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Michael S. Tsirkin, 2018/05/23
Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Richard W.M. Jones, 2018/05/24
Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Richard W.M. Jones, 2018/05/24
Re: [Qemu-block] [Qemu-devel] storing machine data in qcow images?, Max Reitz, 2018/05/28