Re: [Xen-users] installing a new domU

[Anthony Liguori <aliguori@xxxxxxxxxx>]

Fred Blaise wrote:

> Hi all
>
> I have a stupid question...
>
> How do you actually install a new OS inside a new domainU ?
> I assumed it'd be vmware like, meaning, given the following config:
>  
Xen does paravirtualization which means that it cannot run unmodified 
Operating Systems (like VMware can).  This makes installation a little 
challenging since distro installers (while just userspace processes) are 
very picky about how/where they are run.
The easiest approach to installing domUs is to just use qemu.  Do a 
normal install into a qemu disk and then use that disk image as /dev/hda 
in Xen.  For instance, if you install a domU with the following qemu 
command line:
qemu -hda /dev/volumnes/fedora4 -cdrom /dev/cdrom -boot d

Then in Xen, you would use a config that had at least these parameters:

kernel='/boot/vmlinuz-2.6-xenU'
memory=512
name='oes1'
disk=['phy:volumes/fedora3', 'hda', 'w']
root='/dev/hda1'

And it should Just Work.

Regards,

Anthony Liguori

> kernel = "/boot/vmlinuz-2.6.12-xenU"
> memory = 512
> name = "oes1"
> disk = [ 'phy:vgdata/lv_xen_oes1,hda1,w' ]
> disk = [ 'phy:md2,hda2,w' ]
> dhcp="dhcp"
> root = "/dev/hda1 ro"
> extra = "4"
>
> and starting it like 'xm create oes1 -c', the console opens, sees
> nothing (lv_xen_oes1 is empty), it would prompt me to install the new
> OS..
>
> But since I get a
> VFS: Cannot open root device "hda1" or unknown-block(2,0)
> Please append a correct "root=" boot option
> Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
>
> I am assuming there needs to be something on it before I start the
> domain? In that case, how do I install a new OS inside that domain?
>
> Thanks a lot for pointing me to relevant documentation, or answering
> this stupid question.
>
> fred
>
> _______________________________________________
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> http://lists.xensource.com/xen-users
>
>  
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