[Xen-users] Error: Device 769 (vbd) could not be connected...

[Robin Atwood <robin@xxxxxxxxx>]

I have now got to the stage of trying to creating the ttylinux test domain but 
I get:

Error: Device 769 (vbd) could not be connected. Backend device not found.

The xen log shows:
[2006-05-05 18:18:19 xend] DEBUG (DevController:103) DevController: writing 
{'virtual-device': '769', 'backend-id': '0', 'state': '1', 'backend': 
'/local/domain/0/backend/vbd/3/769'} 
to /local/domain/3/device/vbd/769.
[2006-05-05 18:18:19 xend] DEBUG (DevController:105) DevController: writing 
{'domain': 'ttylinux', 'frontend': '/local/domain/3/device/vbd/769', 'dev': 
'hda1', 'state': '1', 'params': '/usr/tmp/ttylinux-xen/rootfs', 'mode': 'w', 
'frontend-id': '3', 'type': 'file'} 
to /local/domain/0/backend/vbd/3/769.
[2006-05-05 18:18:19 xend] DEBUG (DevController:103) DevController: writing 
{'backend-id': '0', 'mac': '00:16:3e:58:07:1e', 'handle': '0', 'state': '1', 
'backend': '/local/domain/0/backend/vif/3/0'} 
to /local/domain/3/device/vif/0.
[2006-05-05 18:18:19 xend] DEBUG (DevController:105) DevController: writing 
{'mac': '00:16:3e:58:07:1e', 'state': '1', 'handle': '0', 'script': 
'/etc/xen/scripts/vif-bridge', 'frontend-id': '3', 'domain': 'ttylinux', 
'frontend': '/local/domain/3/device/vif/0'} 
to /local/domain/0/backend/vif/3/0.
[2006-05-05 18:18:19 xend.XendDomainInfo] DEBUG (XendDomainInfo:671) Storing 
VM details: 
{'ssidref': '0', 'uuid': '85f628ff-ecb5-f6de-8c3f-051fe455d8dd', 'on_reboot': 
'restart', 'start_time': '1146827899.09', 'on_poweroff': 'destroy', 'name': 
'ttylinux', 'vcpus': '1', 'vcpu_avail': '1', 'memory': '64', 'on_crash': 
'restart', 'image': "(linux 
(kernel /boot/vmlinuz-2.6.16-xen-domU) (ip 192.168.1.5:1.2.3.4::::eth0:off) 
(root '/dev/hda1 ro'))", 'maxmem': '64'}
[2006-05-05 18:18:19 xend.XendDomainInfo] DEBUG (XendDomainInfo:696) Storing 
domain details: 
{'console/ring-ref': '126733', 'console/port': '2', 'name': 'ttylinux', 
'console/limit': '1048576', 'vm': '/vm/85f628ff-ecb5-f6de-8c3f-051fe455d8dd', 
'domid': '3', 'cpu/0/availability': 'online', 'memory/target': '65536', 
'store/ring-ref': '126734', 'store/port': '1'}
[2006-05-05 18:18:19 xend.XendDomainInfo] DEBUG (XendDomainInfo:877) 
XendDomainInfo.handleShutdownWatch
[2006-05-05 18:18:19 xend] DEBUG (DevController:132) Waiting for devices vif.
[2006-05-05 18:18:19 xend] DEBUG (DevController:138) Waiting for 0.
[2006-05-05 18:18:19 xend] DEBUG (DevController:403) 
hotplugStatusCallback /local/domain/0/backend/vif/3/0/hotplug-status.
[2006-05-05 18:18:19 xend] DEBUG (DevController:403) 
hotplugStatusCallback /local/domain/0/backend/vif/3/0/hotplug-status.
[2006-05-05 18:18:19 xend] DEBUG (DevController:417) hotplugStatusCallback 1.
[2006-05-05 18:18:19 xend] DEBUG (DevController:132) Waiting for devices usb.
[2006-05-05 18:18:19 xend] DEBUG (DevController:132) Waiting for devices vbd.
[2006-05-05 18:18:19 xend] DEBUG (DevController:138) Waiting for 769.
[2006-05-05 18:18:19 xend] DEBUG (DevController:403) 
hotplugStatusCallback /local/domain/0/backend/vbd/3/769/hotplug-status.
[2006-05-05 18:18:19 xend] DEBUG (DevController:417) hotplugStatusCallback 2.
[2006-05-05 18:18:19 xend.XendDomainInfo] DEBUG (XendDomainInfo:1327) 
XendDomainInfo.destroy: domid=3
[2006-05-05 18:18:19 xend.XendDomainInfo] DEBUG (XendDomainInfo:1335) 
XendDomainInfo.destroyDomain(3)


Some googling shows that this is likely to happen if you are 
missing /etc/hotplug/xen-backend.agent, which I am. I checked the Gentoo 
ebuild and there is no reference to this file, 
although /etc/udev/xen-backend.rules is there. Is it still required in xen 
3.0.2 or is there an ebuild error or am I barking up the wrong tree entirely?

TIA
-Robin.
-- 
----------------------------------------------------------------------
Robin Atwood.

"Ship me somewheres east of Suez, where the best is like the worst,
 Where there ain't no Ten Commandments an' a man can raise a thirst"
         from "Mandalay" by Rudyard Kipling
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