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[Thiago Martins <thiagocmartinsc@xxxxxxxxx>]

I'm reopening (confirming) this, since it is not fixed and Sean allowed
that (comment #30).

** Changed in: nova
       Status: Invalid => Confirmed

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https://bugs.launchpad.net/bugs/1039665

Title:
  Creating quantum L2 networks (without subnets) doesn't work as
  expected

Status in OpenStack Compute (Nova):
  Confirmed

Bug description:
  1. create a network in Quantum.  Networks no longer need subnets, so I
  create a network without one.  (Imagine I'm doing my addressing some
  other way.

      quantum net-create test

  <returns an ID>

  2. create a machine with that network attached via nova.

  nova boot --image xxx --flavor yyy --nic net-
  id=e85d5994-7f8e-4024-bde9-c1cdb2b202d0 hasnet

  All good.  The machine boots perfectly well.  However, it comes up
  without any NICs.

  It turns out that VIF.legacy() is called just before calling
  driver.spawn() for the virt driver.  This converts the VIF
  datastructure from the network model to its old form (because the
  virtualisation layer has not been brought up to date with the new
  model).  The old form can't be created without, at least, an IPv4
  address - so, in the above example where no address has been assigned
  to the VIF, it is silently omitted from the legacy version of the
  datastructure, and no NIC is added to the VM as the network_info
  datastructure is now empty.

  So:

  - am I even calling the API correctly?  Since nova-manage network create and quantum net-create both work, and no-one's written up the documentation yet, I can't tell that I'm doing this right (although I got no joy out of the IDs that nova-manage was returning)
  - is this going to last into Folsom RCs or will it be fixed?
  - if it is going to stay with us, perhaps we could throw an error at this point rather than continuing to create the wrong sort of VM?

  (I need this functionality so I shall have to find a workaround if
  it's going to stay missing.)

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