Xen users - Mar 2011 - Error: Device 0 (vif) could not be connected. Hotplug scripts not working

Hi,

I used the kernel config on Ubuntu Xen documentation and succeeded to 
compile Xen 4.0.1 on Ubuntu 10.04.02 LTS :-

https://help.ubuntu.com/community/Xen#Lucid%20%20Notes%20(Xen%204.0.1%20with%20a%20pv-ops%20Dom0%20kernel%20on%20Ubuntu%2010.04)

However, when I tried to use HVM to install Windows 2003 R2, it failed 
to create the domU :-

 >xm create smlxsv1

A blank console screen appeared for 1 min and then returned an error 
"Error: Device 0 (vif) could not be connected. Hotplug scripts not
working".

I hope someone could point me what went wrong.

Thanks a lot.

John Mok

=== begin of /etc/xen/smlxsv1 ==
# -*- mode: python; -*-

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 = 1024
shadow_memory = 8
name = "smlxsv1"
vif = [ ''type=ioemu, bridge=xenbr0'' ]
disk = [ ''phy:/dev/volgroup1/smlxsv1-disk0,ioemu:hda,w'', 
''phy:/dev/volgroup1/smlxsv1-disk1,ioemu:hdb,w'', 
''file:/var/tmp/win2k3-x64-cd1.iso,ioemu:hdc:cdrom,r'' ]
boot = "d"

device_model = ''/usr/'' + arch_libdir +
''/xen/bin/qemu-dm''
sdl=1
vnc=0
vncpasswd = ''''

=== end of /etc/xen/smlxsv1 ==
=== begin of xend-debug ==
Xend started at Wed Mar 16 18:25:49 2011.
cat: /sys/bus/scsi/devices/host0/vendor: No such file or directory
cat: /sys/bus/scsi/devices/host0/model: No such file or directory
cat: /sys/bus/scsi/devices/host0/type: No such file or directory
cat: /sys/bus/scsi/devices/host0/rev: No such file or directory
cat: /sys/bus/scsi/devices/host0/scsi_level: No such file or directory
cat: /sys/bus/scsi/devices/host1/vendor: No such file or directory
cat: /sys/bus/scsi/devices/host1/model: No such file or directory
cat: /sys/bus/scsi/devices/host1/type: No such file or directory
cat: /sys/bus/scsi/devices/host1/rev: No such file or directory
cat: /sys/bus/scsi/devices/host1/scsi_level: No such file or directory
cat: /sys/bus/scsi/devices/target0:0:0/vendor: No such file or directory
cat: /sys/bus/scsi/devices/target0:0:0/model: No such file or directory
cat: /sys/bus/scsi/devices/target0:0:0/type: No such file or directory
cat: /sys/bus/scsi/devices/target0:0:0/rev: No such file or directory
cat: /sys/bus/scsi/devices/target0:0:0/scsi_level: No such file or directory
cat: /sys/bus/scsi/devices/host2/vendor: No such file or directory
cat: /sys/bus/scsi/devices/host2/model: No such file or directory
cat: /sys/bus/scsi/devices/host2/type: No such file or directory
cat: /sys/bus/scsi/devices/host2/rev: No such file or directory
cat: /sys/bus/scsi/devices/host2/scsi_level: No such file or directory
cat: /sys/bus/scsi/devices/target2:0:32/vendor: No such file or directory
cat: /sys/bus/scsi/devices/target2:0:32/model: No such file or directory
cat: /sys/bus/scsi/devices/target2:0:32/type: No such file or directory
cat: /sys/bus/scsi/devices/target2:0:32/rev: No such file or directory
cat: /sys/bus/scsi/devices/target2:0:32/scsi_level: No such file or 
directory
cat: /sys/bus/scsi/devices/target2:2:0/vendor: No such file or directory
cat: /sys/bus/scsi/devices/target2:2:0/model: No such file or directory
cat: /sys/bus/scsi/devices/target2:2:0/type: No such file or directory
cat: /sys/bus/scsi/devices/target2:2:0/rev: No such file or directory
cat: /sys/bus/scsi/devices/target2:2:0/scsi_level: No such file or directory
/usr/local/lib/python2.6/dist-packages/xen/xend/XendAPI.py:548: 
DeprecationWarning: object.__new__() takes no parameters
   return object.__new__(cls, *args, **kwds)

=== begin of xend-debug ==






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On Wed, Mar 16, 2011 at 10:30 PM, John Mok <jmok@attglobal.net>
wrote:
> I used the kernel config on Ubuntu Xen documentation and succeeded to
> compile Xen 4.0.1 on Ubuntu 10.04.02 LTS :-
> A blank console screen appeared for 1 min and then returned an error
"Error:
> Device 0 (vif) could not be connected. Hotplug scripts not working".
> vif = [ ''type=ioemu, bridge=xenbr0'' ]
Some simple checks:
- do you have udevd running?
- do you have a bridge called xenbr0 (try running "brctl show")

-- 
Fajar

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Dear Fajar,

Thank you for your prompt reply.
>> I used the kernel config on Ubuntu Xen documentation and succeeded to
>> compile Xen 4.0.1 on Ubuntu 10.04.02 LTS :-
>> A blank console screen appeared for 1 min and then returned an error 
"Error:
>> Device 0 (vif) could not be connected. Hotplug scripts not
working".
>> vif = [ ''type=ioemu, bridge=xenbr0'' ]
>Some simple checks:
>- do you have udevd running?
>- do you have a bridge called xenbr0 (try running "brctl show")
Yes, the vdevd is running and the bridge xenbr0 is available :-

bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.782bcb0892e9       no              peth0

I see no clue from the xen logs (see below). I hope someone could point me 
what went wrong. 

Thanks a lot.

John Mok

=== begin of smlxsv1 config ==
# -*- mode: python; -*-

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 = 1024
shadow_memory = 8
name = "smlxsv1"
vif = [ ''type=ioemu, bridge=xenbr0'' ]
disk = [ ''phy:/dev/volgroup1/smlxsv1-disk0,ioemu:hda,w'', 
''phy:/dev/volgroup1/smlxsv1-disk1,ioemu:hdb,w'', 
''file:/var/tmp/win2k3-x64-cd1.iso,ioemu:hdc:cdrom,r'' ]
boot = "d"

device_model = ''/usr/'' + arch_libdir +
''/xen/bin/qemu-dm''
sdl=1
vnc=0
vncpasswd = ''''

=== end of smlxsv1 config ==
=== begin of qemu log ==
domid: 3
config qemu network with xen bridge for  tap3.0 xenbr0
Using file /dev/volgroup1/smlxsv1-disk0 in read-write mode
Using file /dev/volgroup1/smlxsv1-disk1 in read-write mode
Using file /var/tmp/win2k3-x64-cd1.iso in read-only mode
Watching /local/domain/0/device-model/3/logdirty/cmd
Watching /local/domain/0/device-model/3/command
qemu_map_cache_init nr_buckets = 10000 size 4194304
shared page at pfn feffd
buffered io page at pfn feffb
Guest uuid = c55e71c1-928c-5cd5-394d-eff39479e4ba
Time offset set 0
populating video RAM at ff000000
mapping video RAM from ff000000
Register xen platform.
Done register platform.
platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw 
state.
xs_read(/local/domain/0/device-model/3/xen_extended_power_mgmt): read 
error
medium change watch on `hdc'' (index: 2): /var/tmp/win2k3-x64-cd1.iso
I/O request not ready: 0, ptr: 0, port: 0, data: 0, count: 0, size: 0
Log-dirty: no command yet.
xs_read(/local/domain/3/log-throttling): read error
qemu: ignoring not-understood drive `/local/domain/3/log-throttling''
medium change watch on `/local/domain/3/log-throttling'' - unknown
device,
ignored

=== end of qemu log ==



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On Thu, 2011-03-17 at 09:21 +0800, John/SML wrote:
> 
> >> I used the kernel config on Ubuntu Xen documentation and succeeded
> to 
> >> compile Xen 4.0.1 on Ubuntu 10.04.02 LTS :- 
> >Some simple checks: 
> >- do you have udevd running? 
> >- do you have a bridge called xenbr0 (try running "brctl
show")
> 
> Yes, the vdevd is running and the bridge xenbr0 is available :- 
> 
Which version of udevd is your system running? I had a similar issue
(different OS, and my problem was bridge wasn''t being started
correctly), but whilst researching I came across a lot of ubuntu posts
about versions of the default udevd above 151 were not working properly
with xen. The work-around was to downgrade to udevd 151. 
I didn''t see any ''resolution'' posts that said
upgrading the version
solved the problem.
Gareth


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