attach interface error

Asked by skywalker on 2013-07-04

I created a vm,created a port in a network different with the vm's network , and then attached the port to the vm.

The log is as follows:

  File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/", line 430, in _process_data
    rval = self.proxy.dispatch(ctxt, version, method, **args)

  File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/", line 133, in dispatch
    return getattr(proxyobj, method)(ctxt, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/compute/", line 2983, in attach_interface

  File "/usr/lib/python2.7/dist-packages/nova/network/", line 46, in wrapper
    res = f(self, context, *args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/network/quantumv2/", line 336, in allocate_port_for_instance

  File "/usr/lib/python2.7/dist-packages/nova/network/", line 46, in wrapper
    res = f(self, context, *args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/network/quantumv2/", line 286, in allocate_for_instance
    nw_info = self._get_instance_nw_info(context, instance, networks=nets)

  File "/usr/lib/python2.7/dist-packages/nova/network/quantumv2/", line 368, in _get_instance_nw_info
    nw_info = self._build_network_info_model(context, instance, networks)

  File "/usr/lib/python2.7/dist-packages/nova/network/quantumv2/", line 797, in _build_network_info_model
    [n['id'] for n in networks])

  File "/usr/lib/python2.7/dist-packages/nova/network/quantumv2/", line 954, in _ensure_requested_network_ordering
    if preferred:

  File "/usr/lib/python2.7/dist-packages/nova/network/quantumv2/", line 954, in <lambda>
    if preferred:

ValueError: u'0dc714fa-9022-4a03-bb22-9821a396bb9d' is not in list

It looks like that a vm can't have ports in different networks.
Is that right?

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Keith Tobin (keith-tobin) said : #1

The VM can only connect to the port of a network if,

A) the tenant that owns the VM is also the owner of the network.
B) the network is flagged as a shared network, then any VM from any network can create a port and connect a VM.

What you can not do is have a VM belong to one tenant connect to a port in a second tenant network where that network is not a flagged as shared.

The above is true for quantum/neutron/openstack networking.

skywalker (sunzuohua) said : #2

I think that may be a problem in nova.
The method will sort the port list with respect to the preferred network ordering.But if there is a port which is not belong to any preferred,the error will occur.

Can you help with this problem?

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