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[Bug 1597208] [NEW] Failed to Create an Instance using macvtap cause existence of "_" in interface vf_name (Regex miss)

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Public bug reported:

Step to reproduce :

1) neutron port-create --name port1 --binding:vnic_type=macvtap private
2) nova boot --flavor 2 --image <image_id> --nic port-id=<port_id> vm_1

Interface Name on Compute = "p2p1_0"

>From n-cpu.log :

2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [req-a4694341-f7e0-4e7b-b98e-5f640abbf950 admin admin] [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Failed to allocate network(s)                 2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Traceback (most recent call last):
2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/compute/manager.py", line 2064, in _build_and_run_instance              2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     block_device_info=block_device_info)
2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2780, in spawn                            2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     block_device_info=block_device_info)
2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 4946, in _create_domain_and_network       2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     raise exception.VirtualInterfaceCreateException()
2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] VirtualInterfaceCreateException: Virtual Interface creation failed                                   2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]
2016-06-29 06:01:04.593 1265 DEBUG nova.compute.utils [req-a4694341-f7e0-4e7b-b98e-5f640abbf950 admin admin] [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Virtual Interface creation failed notify_about_instance_usage /opt/stack/nova/nova/compute/utils.py:284
2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [req-a4694341-f7e0-4e7b-b98e-5f640abbf950 admin admin] [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Build of instance 7a3063f5-43a7-4d25-b23e-335a2a3274ab aborted: Failed to allocate the network(s), not rescheduling.
2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Traceback (most recent call last):                                                                   2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/compute/manager.py", line 1926, in _do_build_and_run_instance
2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     filter_properties)                                                                               2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/compute/manager.py", line 2102, in _build_and_run_instance
2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     reason=msg)                                                                                      2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] BuildAbortException: Build of instance 7a3063f5-43a7-4d25-b23e-335a2a3274ab aborted: Failed to alloca
te the network(s), not rescheduling.                                                                                                                                                                          2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: sriov-pci-pt

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https://bugs.launchpad.net/bugs/1597208

Title:
  Failed to Create an Instance using macvtap cause existence of "_" in
  interface vf_name (Regex miss)

Status in neutron:
  New

Bug description:
  Step to reproduce :

  1) neutron port-create --name port1 --binding:vnic_type=macvtap private
  2) nova boot --flavor 2 --image <image_id> --nic port-id=<port_id> vm_1

  Interface Name on Compute = "p2p1_0"

  From n-cpu.log :

  2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [req-a4694341-f7e0-4e7b-b98e-5f640abbf950 admin admin] [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Failed to allocate network(s)                 2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Traceback (most recent call last):
  2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/compute/manager.py", line 2064, in _build_and_run_instance              2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     block_device_info=block_device_info)
  2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 2780, in spawn                            2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     block_device_info=block_device_info)
  2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/virt/libvirt/driver.py", line 4946, in _create_domain_and_network       2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     raise exception.VirtualInterfaceCreateException()
  2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] VirtualInterfaceCreateException: Virtual Interface creation failed                                   2016-06-29 06:01:04.592 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]
  2016-06-29 06:01:04.593 1265 DEBUG nova.compute.utils [req-a4694341-f7e0-4e7b-b98e-5f640abbf950 admin admin] [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Virtual Interface creation failed notify_about_instance_usage /opt/stack/nova/nova/compute/utils.py:284
  2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [req-a4694341-f7e0-4e7b-b98e-5f640abbf950 admin admin] [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Build of instance 7a3063f5-43a7-4d25-b23e-335a2a3274ab aborted: Failed to allocate the network(s), not rescheduling.
  2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] Traceback (most recent call last):                                                                   2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/compute/manager.py", line 1926, in _do_build_and_run_instance
  2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     filter_properties)                                                                               2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]   File "/opt/stack/nova/nova/compute/manager.py", line 2102, in _build_and_run_instance
  2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]     reason=msg)                                                                                      2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab] BuildAbortException: Build of instance 7a3063f5-43a7-4d25-b23e-335a2a3274ab aborted: Failed to alloca
  te the network(s), not rescheduling.                                                                                                                                                                          2016-06-29 06:01:04.593 1265 ERROR nova.compute.manager [instance: 7a3063f5-43a7-4d25-b23e-335a2a3274ab]

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