[Openstack] Problem with neutron
Amir Sadoughi
amir.sadoughi at RACKSPACE.COM
Fri Dec 20 16:25:25 UTC 2013
Hi Mārtiņš,
I am not familiar with the devstack documentation. From experience, I know ovs-neutron-agent can utilize neutron-rootwrap-xen-dom0 to run ip, ovs-ofctl, and ovs-vsctl commands in the dom0 from the domU. You’ll have to set the root_helper configuration in ovs_neutron_plugin.ini to something like:
root_helper = neutron-rootwrap-xen-dom0 /etc/neutron/rootwrap.conf
Make sure to install netwrap into the dom0. I haven’t tried live migration, sorry.
Amir
On Dec 20, 2013, at 9:05 AM, Mārtiņš Jakubovičs <martins at hostnet.lv> wrote:
> Hello,
>
> I am going forward with trying to implementing neutron in XenServer. Looking in documentation that is possible with DevStack. https://wiki.openstack.org/wiki/QuantumDevstackOvsXcp But there is one catch, in section, where you enable services(ENABLED_SERVICES) there is two more services, which isn't in havana release: q-agt and q-domua. So, if I am right, this two services make possible to run necessary neutron commands from domU in to dom0. So, where I can get this services? Or maybe all this is included in neutron-plugin-openvswitch-agent package, just need to configure it right?
> In /etc/neutron/rootwrap.conf is xenapi section, so I suppose that it is required to run neutron + XenServer. And there is /usr/bin/neutron-rootwrap-xen-dom0 script, which login to XenServer and run commands.
>
> And additional question:
>
> Is anyone trying to live migrate with OpenStack + neutron + XenServer setup? I can't live migration, got error: http://paste.openstack.org/show/55683/
> Maybe this is because my neutron setup is not working completely, but maybe this is bug in live migration ...
>
> Thanks.
>
> On 2013.12.16. 21:33, Amir Sadoughi wrote:
>> Glad to hear it’s working better. To be honest, I haven’t gotten further than this. For my test environment, I end up using VNC to statically set the neutron ports' fixed ip inside the instance.
>>
>> From what I’ve read, I think at this point you have to setup the metadata agent to run listening on 169.254.169.254 or you can try something called config drive, but I haven’t bothered getting either working yet.
>>
>> Hopefully someone else can chime in and help us out both!
>>
>> Amir
>>
>>
>> On Dec 16, 2013, at 1:23 PM, Mārtiņš Jakubovičs <martins at hostnet.lv> wrote:
>>
>>> Thanks you!
>>>
>>> At least something is going forward! :) That works, no more error and instance boot's.
>>> I created network in XenServer by command:
>>>
>>> xe network-create name-label=br-int
>>>
>>> With:
>>>
>>> xe network-list name-label=br-int params=bridge
>>>
>>> I get bridge name - xapi1
>>>
>>> After that in XenServer:
>>>
>>> ovs-vsctl add-br xapi1
>>>
>>> Got error: ovs-vsctl: cannot create a bridge named xapi1 because a bridge named xapi1 already exists
>>>
>>> In nova-compute I changed integration_bridge to xapi1 in ovs_neutron_plugin.ini file. Than in nova-compute i run:
>>>
>>> ovs-vsctl del-br br-int
>>> ovs-vsctl add-br xapi1
>>>
>>> Now running instances get br-int network attached, but lookls like dhcp is not working. Instance can't assign IP. Neutron and nova logs without errors. Maybe is some ideas why dhcp is not working? Maybe some there is some "painful spots" with dhcp? Or I missed something with configuration from above?
>>>
>>> On 2013.12.16. 18:10, Amir Sadoughi wrote:
>>>> My apologies, it looks like I scanned your original error message too quickly.
>>>>
>>>> “Found no network for bridge br-int” means you need to run `xe network-create …`. AFAICT, xe network-create does not let you specify the bridge name. So, from the result of xe network-create, you need to invoke `ovs-vsctl add-br …` with the bridge name it specifies and reconfigure Nova/Neutron/OVS plugin to use that bridge as the integration bridge.
>>>>
>>>> Hopefully that advice will get you further.
>>>>
>>>> Amir
>>>>
>>>> On Dec 15, 2013, at 9:31 AM, Mārtiņš Jakubovičs <martins at hostnet.lv> wrote:
>>>>
>>>>> With OpenStack + XenServer is much more questions than should be. For example, what then is this - http://openvswitch.org/openstack/documentation/
>>>>>
>>>>> Or Nicira NVP, where I can download it? Looks like it is now a part of VMware.
>>>>>
>>>>> On 2013.12.15. 15:04, 郭龙仓 wrote:
>>>>>> Yes , you must use Nicira NVP with XenServer
>>>>>>
>>>>>>
>>>>>> 2013/12/15 Mārtiņš Jakubovičs <martins at hostnet.lv>
>>>>>> Hello,
>>>>>>
>>>>>> Is this right tutorial to install neutron in OpenStack with XenServer? In this section say's that OVS isn't supported in XenServer with neutron, is it right? So I must uninstall OVS and use this Nicira NVP?
>>>>>>
>>>>>>
>>>>>> On 2013.12.13. 10:54, Mārtiņš Jakubovičs wrote:
>>>>>>> Hello all,
>>>>>>>
>>>>>>> I have problem with setting up neutron. I have latest havana realase and XenServer 6.2 as hypervisor.
>>>>>>> I did all step-by-step from this tutorial http://docs.openstack.org/havana/install-guide/install/apt/content/neutron-install-network-node.html
>>>>>>> All is going well, I can create network's, create router, create subnets, assign all that stuff... But when I start to create VM with selected network (demo-net or ext-net as describet in documentation), VM fail to build and erase from XenServer.
>>>>>>> Error message - Exception: Found no network for bridge br-int
>>>>>>>
>>>>>>> I looked in a lot of documentation, but can't find what I did wrong.
>>>>>>>
>>>>>>> Thanks.
>>>>>>>
>>>>>>> Full error message:
>>>>>>>
>>>>>>> 2013-12-13 10:49:01.677 27965 INFO nova.virt.xenapi.vm_utils [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] VBD OpaqueRef:9719605d-c322-d591-cede-01dd8940706f detach rejected, attempt 1/11
>>>>>>> 2013-12-13 10:49:03.174 27965 ERROR nova.utils [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Failed to spawn, rolling back
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Traceback (most recent call last):
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 491, in _spawn
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] setup_network_step(undo_mgr, vm_ref)
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 153, in inner
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] rv = f(*args, **kwargs)
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 453, in setup_network_step
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._create_vifs(instance, vm_ref, network_info)
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 1576, in _create_vifs
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] vm_ref=vm_ref, device=device)
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vif.py", line 55, in plug
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._session, vif['network']['bridge'])
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/network_utils.py", line 51, in find_network_with_bridge
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] raise Exception(_('Found no network for bridge %s') % bridge)
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Exception: Found no network for bridge br-int
>>>>>>> 2013-12-13 10:49:03.174 27965 TRACE nova.utils [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6]
>>>>>>> 2013-12-13 10:49:03.186 27965 WARNING nova.virt.xenapi.vm_utils [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] VM already halted, skipping shutdown...
>>>>>>> 2013-12-13 10:49:03.472 27965 ERROR nova.virt.xenapi.vm_utils [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] ['HANDLE_INVALID', 'VDI', 'OpaqueRef:e9a1bc76-8046-8afd-8997-caed632a80a5']
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils Traceback (most recent call last):
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vm_utils.py", line 439, in destroy_vdi
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils session.call_xenapi('VDI.destroy', vdi_ref)
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/driver.py", line 757, in call_xenapi
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils return session.xenapi_request(method, args)
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils File "/usr/local/lib/python2.7/dist-packages/XenAPI.py", line 133, in xenapi_request
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils result = _parse_result(getattr(self, methodname)(*full_params))
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils File "/usr/local/lib/python2.7/dist-packages/XenAPI.py", line 203, in _parse_result
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils raise Failure(result['ErrorDescription'])
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils Failure: ['HANDLE_INVALID', 'VDI', 'OpaqueRef:e9a1bc76-8046-8afd-8997-caed632a80a5']
>>>>>>> 2013-12-13 10:49:03.472 27965 TRACE nova.virt.xenapi.vm_utils
>>>>>>> 2013-12-13 10:49:03.475 27965 ERROR nova.virt.xenapi.vm_utils [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] Unable to destroy VDI OpaqueRef:e9a1bc76-8046-8afd-8997-caed632a80a5
>>>>>>> 2013-12-13 10:49:03.476 27965 ERROR nova.compute.manager [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Instance failed to spawn
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Traceback (most recent call last):
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1407, in _spawn
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] block_device_info)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/driver.py", line 216, in spawn
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] admin_password, network_info, block_device_info)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 359, in spawn
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] network_info, block_device_info, name_label, rescue)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 505, in _spawn
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] undo_mgr.rollback_and_reraise(msg=msg, instance=instance)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 979, in rollback_and_reraise
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._rollback()
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 491, in _spawn
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] setup_network_step(undo_mgr, vm_ref)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 153, in inner
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] rv = f(*args, **kwargs)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 453, in setup_network_step
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._create_vifs(instance, vm_ref, network_info)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 1576, in _create_vifs
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] vm_ref=vm_ref, device=device)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vif.py", line 55, in plug
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._session, vif['network']['bridge'])
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/network_utils.py", line 51, in find_network_with_bridge
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] raise Exception(_('Found no network for bridge %s') % bridge)
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Exception: Found no network for bridge br-int
>>>>>>> 2013-12-13 10:49:03.476 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6]
>>>>>>> 2013-12-13 10:49:03.548 27965 AUDIT nova.compute.manager [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Terminating instance
>>>>>>> 2013-12-13 10:49:04.174 27965 INFO nova.virt.xenapi.vmops [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Destroying VM
>>>>>>> 2013-12-13 10:49:04.179 27965 WARNING nova.virt.xenapi.vmops [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] VM is not present, skipping destroy...
>>>>>>> 2013-12-13 10:49:04.422 27965 ERROR nova.compute.manager [req-b9f302a8-8bb4-4336-92a2-eb9c8b96584e a7712da5cc054f819886dbe5a89429d5 76619aca43f841e0bed1a3b89ce8b426] [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Error: Found no network for bridge br-int
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Traceback (most recent call last):
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1037, in _build_instance
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] set_access_ip=set_access_ip)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1410, in _spawn
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] LOG.exception(_('Instance failed to spawn'), instance=instance)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1407, in _spawn
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] block_device_info)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/driver.py", line 216, in spawn
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] admin_password, network_info, block_device_info)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 359, in spawn
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] network_info, block_device_info, name_label, rescue)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 505, in _spawn
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] undo_mgr.rollback_and_reraise(msg=msg, instance=instance)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 979, in rollback_and_reraise
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._rollback()
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 491, in _spawn
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] setup_network_step(undo_mgr, vm_ref)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 153, in inner
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] rv = f(*args, **kwargs)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 453, in setup_network_step
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._create_vifs(instance, vm_ref, network_info)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vmops.py", line 1576, in _create_vifs
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] vm_ref=vm_ref, device=device)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/vif.py", line 55, in plug
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] self._session, vif['network']['bridge'])
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] File "/usr/lib/python2.7/dist-packages/nova/virt/xenapi/network_utils.py", line 51, in find_network_with_bridge
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] raise Exception(_('Found no network for bridge %s') % bridge)
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6] Exception: Found no network for bridge br-int
>>>>>>> 2013-12-13 10:49:04.422 27965 TRACE nova.compute.manager [instance: 5a8dff7e-e8e0-4885-8df5-27ba8bb6a0e6]
>>>>>>>
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>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>>
>>>>>
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>>
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