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[Swaminathan Vasudevan <souminathan@xxxxxxxxx>]

Public bug reported:

PCI-Passthrough of a NIC device to the VM fails, when we have both the
Flavor configured with Alias and also provide a network port with
'vnic_type=direct-physical'.


The comment shown in the source code shown below,

https://github.com/openstack/nova/blob/644ac5ec37903b0a08891cc403c8b3b63fc2a91c/nova/compute/api.py#L812
        # PCI requests come from two sources: instance flavor and
        # requested_networks. The first call in below returns an
        # InstancePCIRequests object which is a list of InstancePCIRequest
        # objects. The second call in below creates an InstancePCIRequest
        # object for each SR-IOV port, and append it to the list in the
        # InstancePCIRequests object

In this case there would be two PCI-requests for the same device and
_test_pci fails when the compute tries to check for the Claims.

088d81f6653242318245b137b1ef91c7] _test_pci /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/nova/compute/claims.py:201
2018-04-30 22:17:06.058 13396 DEBUG nova.compute.claims [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] pci requests: [InstancePCIRequest(alias_name='intel10fb',count=1,is_new=False,request_id=None,spec=[{dev_type='type-PF',product_id='10fb',vendor_id='8086'}]), InstancePCIRequest(alias_name=None,count=1,is_new=False,request_id=13befe5f-478f-4f4c-aa72-78cce84d942d,spec=[{dev_type='type-PF',physical_network='physnet2'}])] _test_pci /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/nova/compute/claims.py:202
2018-04-30 22:17:06.059 13396 DEBUG nova.compute.claims [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] PCI request stats failed  _test_pci /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/nova/compute/claims.py:206
2018-04-30 22:17:06.059 13396 DEBUG oslo_concurrency.lockutils [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] Lock "compute_resources" released by "nova.compute.resource_tracker.instance_claim" :: held 0.059s inner /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/oslo_concurrency/lockutils.py:282
2018-04-30 22:17:06.060 13396 DEBUG nova.compute.manager [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] [instance: 39ad3a47-66dc-4114-9653-fee5ee0c87dc] Insufficient compute resources: Claim pci failed.. 

Not sure why the Claim pci failed for the same device entry twice.

Probably if the device id is the same on both Flavor and network, then
it should only compose one entry since they both are identical.

** Affects: nova
     Importance: Undecided
         Status: New


** Tags: pci

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https://bugs.launchpad.net/bugs/1768919

Title:
  PCI-Passthrough fails when we have Flavor configured and provide a
  port with vnic_type=direct-physical

Status in OpenStack Compute (nova):
  New

Bug description:
  PCI-Passthrough of a NIC device to the VM fails, when we have both the
  Flavor configured with Alias and also provide a network port with
  'vnic_type=direct-physical'.

  
  The comment shown in the source code shown below,

  https://github.com/openstack/nova/blob/644ac5ec37903b0a08891cc403c8b3b63fc2a91c/nova/compute/api.py#L812
          # PCI requests come from two sources: instance flavor and
          # requested_networks. The first call in below returns an
          # InstancePCIRequests object which is a list of InstancePCIRequest
          # objects. The second call in below creates an InstancePCIRequest
          # object for each SR-IOV port, and append it to the list in the
          # InstancePCIRequests object

  In this case there would be two PCI-requests for the same device and
  _test_pci fails when the compute tries to check for the Claims.

  088d81f6653242318245b137b1ef91c7] _test_pci /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/nova/compute/claims.py:201
  2018-04-30 22:17:06.058 13396 DEBUG nova.compute.claims [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] pci requests: [InstancePCIRequest(alias_name='intel10fb',count=1,is_new=False,request_id=None,spec=[{dev_type='type-PF',product_id='10fb',vendor_id='8086'}]), InstancePCIRequest(alias_name=None,count=1,is_new=False,request_id=13befe5f-478f-4f4c-aa72-78cce84d942d,spec=[{dev_type='type-PF',physical_network='physnet2'}])] _test_pci /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/nova/compute/claims.py:202
  2018-04-30 22:17:06.059 13396 DEBUG nova.compute.claims [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] PCI request stats failed  _test_pci /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/nova/compute/claims.py:206
  2018-04-30 22:17:06.059 13396 DEBUG oslo_concurrency.lockutils [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] Lock "compute_resources" released by "nova.compute.resource_tracker.instance_claim" :: held 0.059s inner /opt/stack/venv/nova-20180424T164716Z/lib/python2.7/site-packages/oslo_concurrency/lockutils.py:282
  2018-04-30 22:17:06.060 13396 DEBUG nova.compute.manager [req-c7689c16-227a-462e-aad5-4c462036051c df7bd0a08ee64da981574d7a7d76970a 088d81f6653242318245b137b1ef91c7] [instance: 39ad3a47-66dc-4114-9653-fee5ee0c87dc] Insufficient compute resources: Claim pci failed.. 

  Not sure why the Claim pci failed for the same device entry twice.

  Probably if the device id is the same on both Flavor and network, then
  it should only compose one entry since they both are identical.

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