Xen users - Jun 2006 - Problem passing command-line parameters to xm create

Hello,

I''m trying to create domains using xm create by passing all the
parameters on the command line, instead of putting them in
/etc/xen/xmdefconfig (I''m generating them from a script).

But, the very same configuration, while working when in the file,
fails with inline parameters :
>xm create name="domainFoo"
kernel="/boot/vmlinuz-2.6-xen" memory=256
root="/dev/sda1 ro" "disk=[
"file:/var/xen/domainFoo.img,sda1,w" ]"
Using config file "xmdefconfig".
Error: Device 2049 (vbd) could not be connected. Hotplug scripts not working.

It seems that the "disk" parameter isn''t parsed correctly.
Can you see
what I''m doing wrongly ?

Thanks in advance,

-- 
Olivier Pernet
Summer Student, CERN Openlab

We are the knights who say
echo ''16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq''|dc

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> But, the very same configuration, while working when in the file,
> fails with inline parameters :
>> xm create name="domainFoo"
kernel="/boot/vmlinuz-2.6-xen" memory=256
> root="/dev/sda1 ro" "disk=[
"file:/var/xen/domainFoo.img,sda1,w" ]"
> Using config file "xmdefconfig".
> Error: Device 2049 (vbd) could not be connected. Hotplug scripts not 
> working.
> 
Olivier,

according to the xm man page you should specify /dev/null as "config 
file" like this (taken from man):

xm create /dev/null ramdisk=initrd-xen \
                     kernel=/boot/vmlinuz-xen \
                     name=ramdisk nics=0 vcpus=1 \
                     memory=64 root=/dev/ram0


Looks like in this case you should omit the quotation marks.

Cheers,
Andrej

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On 6/20/06, Pablo Javier Roca Mendez
<pablo_javier_roca_mendez@linux.intel.com> wrote:
> On Tue, Jun 20, 2006 at 11:12:57AM +0200, Olivier Pernet wrote:
> > Hello,
>
> Hi!
>
> > I''m trying to create domains using xm create by passing all
the
> > parameters on the command line, instead of putting them in
> > /etc/xen/xmdefconfig (I''m generating them from a script).
> >
> > But, the very same configuration, while working when in the file,
> > fails with inline parameters :
> > >xm create name="domainFoo"
kernel="/boot/vmlinuz-2.6-xen" memory=256
> > root="/dev/sda1 ro" "disk=[
"file:/var/xen/domainFoo.img,sda1,w" ]"
> > Using config file "xmdefconfig".
> > Error: Device 2049 (vbd) could not be connected. Hotplug scripts not
> > working.
> >
> > It seems that the "disk" parameter isn''t parsed
correctly. Can you see
> > what I''m doing wrongly ?
>
> Yes, the double quotes are interpreted by the shell.
> Try surrounding them with single quotes like this instead:
>      ''disk=[ "file:/var/xen/domainFoo.img,sda1,w"
]''
>
> Regards,
> Pablo
>
It does not work this was either :

[618] root@oplaslim9 [/etc/xen]
>xm create /dev/null kernel="/boot/vmlinuz-2.6-xen" memory=256
root="/dev/sda1 ro" disk=''[
"file:/var/xen/domainFoo.img,sda1,w" ]''
Using config file "/dev/null".
Error: Device 2049 (vbd) could not be connected. Hotplug scripts not working.

But somobody suggested another way, which is working :

[613] root@oplaslim9 [/etc/xen]
>xm create /dev/null kernel="/boot/vmlinuz-2.6-xen" memory=256
root="/dev/sda1 ro"
disk="file:/var/xen/domainFoo.img,sda1,w"
Using config file "/dev/null".
Started domain null

Notice the removal of the [ ]. And it looks like it is possible to use
several disks by putting several disk= parameters on the command line.

-- 
Olivier Pernet

We are the knights who say
echo ''16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq''|dc

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