[Xen-devel] Re: Stub domains broken in 3.4.0-rc3?

[Keith Coleman <list.keith@xxxxxxxxxxx>]

On Fri, May 8, 2009 at 10:20 AM, Stefano Stabellini
<stefano.stabellini@xxxxxxxxxxxxx> wrote:
> Keith Coleman wrote:
>
>> Is there a known issue that prevents stub domains from working in 3.4.0-rc3?
>>
>> I attempted to use a stub domain configuration files that worked in
>> xen 3.3.1 but they don't work due to the recent addition of
>> automatically generated -dm files. Moving some config lines from the
>> old -dm file to the -stub file allows the creation process to go a
>> little further but I get the following error:
>>
>> # cat /var/log/xen/qemu-dm-win4.log
>> Error: Device 768 (vbd) could not be connected.
>> Device /dev/mapper/testvg-win4s is mounted in a guest domain,
>> and so cannot be mounted now.
>> Using config file "/etc/xen/stubdoms/win4-dm".
>> Using config file "/etc/xen/stubdoms/win4-dm".
>>
>> The stub domain dies immediately.
>
>
> Could you please post your config file?
>
> After the recent stubdom config file changes you only have one
> configuration file, as for normal non-stubdom domains.
> As a consequence you need to specify in that config file all the
> informations, including vif and disk and graphic frontend type.
>
> Sorry for the late reply,
>
> Stefano
>

My current config file is just a slightly modified version of the
xmexample.hvm. It works for regular HVM mode if I switch the
stubdom-dm for qemu-dm. I have fs-backend running in the background.

# cat stub1-clean
import os, re
arch = os.uname()[4]
if re.search('64', arch):
    arch_libdir = 'lib64'
else:
    arch_libdir = 'lib'
kernel = "/usr/lib/xen/boot/hvmloader"
builder='hvm'
memory = 512
name = "stub1"
vif = [ 'type=ioemu, bridge=eth0' ]
disk = [ 'phy:/dev/testvg/stub1,hda,w',
         'file:/root/isos/win2003entR2.iso,hdc:cdrom,r' ]
device_model = '/usr/' + arch_libdir + '/xen/bin/stubdom-dm'
#device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'
boot="dca"
sdl=0
opengl=1
vnc=1
vnclisten="0.0.0.0"
vncpasswd=''
stdvga=0
serial='pty'
usb=1
usbdevice='tablet'


# cat /var/log/xen/qemu-dm-stub1.log
Error: Device 768 (vbd) could not be connected.
Device /dev/mapper/testvg-stub1 is mounted in a guest domain,
and so cannot be mounted now.
Using config file "/etc/xen/stubdoms/stub1-dm".
Using config file "/etc/xen/stubdoms/stub1-dm".

# cat /var/log/xen/qemu-dm-stub1-dm.log
domid: 71
Warning: vlan 0 is not connected to host network
Strip off blktap sub-type prefix to /root/isos/win2003entR2.iso (drv 'aio')
Watching /local/domain/0/device-model/71/logdirty/next-active
Watching /local/domain/0/device-model/71/command
char device redirected to /dev/pts/3
/root/xen-3.4-rc3/xen-unstable.hg/tools/ioemu-dir/hw/xen_blktap.c:628:
Init blktap pipes
xs_read(): vncpasswd get error.
/vm/e0dd1e52-a827-8c47-7e3d-cc26941e4419/vncpasswd.
medium change watch on `hdc' (index: 1): aio:/root/isos/win2003entR2.iso



-Keith

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