[Rdo-list] Icehouse multi-node - Centos7 - live migration failed because of "network qbr no such device"

[Benoit ML]

Hello,

I'm working on a multi-node setup of openstack Icehouse using centos7.
Well i have :
  - one controllor node with all server services thing stuff
  - one network node with openvswitch agent, l3-agent, dhcp-agent
  - two compute node with nova-compute and neutron-openvswitch
  - one storage nfs node

NetworkManager is deleted on compute nodes and network node.

My network use is configured to use vxlan.  I can create VM,
tenant-network, external-network, routeur, assign floating-ip to VM, push
ssh-key into VM, create volume from glance image, etc... Evrything is
conected and reacheable. Pretty cool :)

But when i try to migrate VM things go wrong ...  I have configured  nova,
libvirtd and qemu to use migration through libvirt-tcp.
I have create and exchanged ssh-key for nova user on all  node. I have
verified userid and groupid of nova.

Well nova-compute log, on the target compute node, :
2014-07-11 11:45:02.749 6984 TRACE nova.compute.manager [instance:
a5326fe1-4faa-4347-ba29-159fce26a85c] RemoteError: Remote error:
Unauthorized {"error": {"m
essage": "The request you have made requires authentication.", "code": 401,
"title": "Unauthorized"}}


So well after searching a lots in all logs, i have fount that i cant simply
migration VM between compute node with a simple virsh :
virsh migrate instance-00000084 qemu+tcp://<dest>/system

The error is :
erreur :Cannot get interface MTU on 'qbr3ca65809-05': No such device

Well when i look on the source hyperviseur the bridge "qbr3ca65809" exists
 and have a network tap device.  And moreover i manually create qbr3ca65809
on the target hypervisor, virsh migrate succed !

Can you help me plz ?
What can i do wrong ? Perhpas neutron must create the bridge before
migration but didnt for a mis configuration ?

Plz ask anything you need !

Thank you in advance.


The full nova-compute log attached.






Regards,

-- 
--
Benoit
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