Re: [libvirt-users] kvm virtual server boot order
Given the scenario where the disks of a virtual server are defined in
the
following order
harddisk hda
harddisk vda
cdrom vdb
cdrom hdb
Boot device type is crdom. Which cdrom device will be boot attempted?
>From the above links, I'm guessing that hdb will be boot attempted. Is this
the actual behavior?
That depends on BIOS implementation used by qemu and to be honest, I'm not
sure what the default behavior is; you would need to try that :-)
However, if you have new enough libvirt (>= 0.8.8), qemu and SeaBIOS (AFAIK
qemu >= 0.14.0 should be ok), you can better control boot order by using
per-device boot configuration. That is, instead of specifying
<os>
...
<boot dev='cdrom'/>
</os>
you would use something like
<devices>
...
<disk type='file' device='cdrom'>
...
<boot order='1'/>
</disk>
</devices>
It's also documented in libvirt XML documentation at
http://www.libvirt.org/formatdomain.html#elementsDisks
Jirka