Re: [libvirt] [RFC] Explicit boot device ordering
On Tue, Jan 11, 2011 at 03:17:26PM +0100, Jiri Denemark wrote:
Hi,
I'm working on $SUBJ and I can't decide on XML representation of that. The
goal is to let users specify an ordered list of devices to boot from, e.g.,
2nd NIC, 1st NIC, 1st CD-ROM, 2nd IDE disk. We already have boot elements in
/domain/os so we could make use of them or we could add a boot element inside
device elements.
So for the first case, we could have something like
<os>
<boot target='net1'/>
<boot target='net0'/>
<boot target='hdc'/>
<boot target='hdb'/>
<os>
Where target attributes would match /domain/devices/*/target@dev
For the second case, appropriate devices would contain <boot order='n'/>
elements.
Personally I like the first option more since it is very easy to change boot
order in that case and the whole boot list is co-located at a single place in
domain XML.
I agree. Is it necessarily the case that every boot device is a real
device in the XML? Maybe there is a system that can boot from
internal ROM or some other abstraction that doesn't correspond to a
libvirt <device>.
Do you feel the same or do you even have a better solution in your
mind?
Well how about ...
<boot> net1 net0 hdc hdb </boot>
Rich.
--
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