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[Bug 1399453] [NEW] Nexus VXLAN gateway: VM with 2 interfaces to the same subnet delete issues

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Danny Choi <dannchoi@xxxxxxxxx>
Date: Thu, 04 Dec 2014 22:06:53 -0000
Reply-to: Bug 1399453 <1399453@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

With Nexus VXLAN gateway, there are delete issues with the last VM that
has 2 interfaces to the same subnet.

1. When one interface is deleted, all the VLAN/VNI mapping
configurations are deleted at the Nexus switch.

2. When the last interface or the VM is deleted, traceback is logged in
screen-q-svc.log.

2014-12-03 18:03:38.433 ERROR neutron.plugins.ml2.managers [req-dda788e5-759f-4caf-81f6-a31b43025ede demo f0fd7da7d2874c1590a0092aab9014c3] Mechanism driver 'cisco_nexus' failed in delete_port_postcommit
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers Traceback (most recent call last):
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/managers.py", line 299, in _call_on_drivers
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     getattr(driver.obj, method_name)(context)
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/mech_cisco_nexus.py", line 400, in delete_port_postcommit
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     self._delete_nve_member) if vxlan_segment else 0
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/mech_cisco_nexus.py", line 325, in _port_action_vxlan
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     func(vni, device_id, mcast_group, host_id)
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/mech_cisco_nexus.py", line 155, in _delete_nve_member
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     vni)
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/nexus_network_driver.py", line 253, in delete_nve_member
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     self._edit_config(nexus_host, config=confstr)
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/nexus_network_driver.py", line 80, in _edit_config
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     raise cexc.NexusConfigFailed(config=config, exc=e)
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers NexusConfigFailed: Failed to configure Nexus: 
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers       <config xmlns:xc="urn:ietf:params:xml:ns:netconf:base:1.0">
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers         <configure>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers           <__XML__MODE__exec_configure>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers <interface>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     <nve>nve1</nve>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     <__XML__MODE_if-nve>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers         <member>no member vni 9000</member>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     </__XML__MODE_if-nve>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers </interface>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers 
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers           </__XML__MODE__exec_configure>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers         </configure>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers       </config>
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers . Reason: ERROR: VNI delete validation failed
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers .
2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers 
2014-12-03 18:03:38.435 ERROR neutron.plugins.ml2.plugin [req-dda788e5-759f-4caf-81f6-a31b43025ede demo f0fd7da7d2874c1590a0092aab9014c3] mechanism_manager.delete_port_postcommit failed for port da89ec67-e825-4a52-8dfa-6a2556624a9e

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1399453

Title:
  Nexus VXLAN gateway: VM with 2 interfaces to the same subnet delete
  issues

Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  With Nexus VXLAN gateway, there are delete issues with the last VM
  that has 2 interfaces to the same subnet.

  1. When one interface is deleted, all the VLAN/VNI mapping
  configurations are deleted at the Nexus switch.

  2. When the last interface or the VM is deleted, traceback is logged
  in screen-q-svc.log.

  2014-12-03 18:03:38.433 ERROR neutron.plugins.ml2.managers [req-dda788e5-759f-4caf-81f6-a31b43025ede demo f0fd7da7d2874c1590a0092aab9014c3] Mechanism driver 'cisco_nexus' failed in delete_port_postcommit
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers Traceback (most recent call last):
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/managers.py", line 299, in _call_on_drivers
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     getattr(driver.obj, method_name)(context)
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/mech_cisco_nexus.py", line 400, in delete_port_postcommit
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     self._delete_nve_member) if vxlan_segment else 0
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/mech_cisco_nexus.py", line 325, in _port_action_vxlan
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     func(vni, device_id, mcast_group, host_id)
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/mech_cisco_nexus.py", line 155, in _delete_nve_member
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     vni)
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/nexus_network_driver.py", line 253, in delete_nve_member
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     self._edit_config(nexus_host, config=confstr)
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers   File "/opt/stack/neutron/neutron/plugins/ml2/drivers/cisco/nexus/nexus_network_driver.py", line 80, in _edit_config
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     raise cexc.NexusConfigFailed(config=config, exc=e)
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers NexusConfigFailed: Failed to configure Nexus: 
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers       <config xmlns:xc="urn:ietf:params:xml:ns:netconf:base:1.0">
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers         <configure>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers           <__XML__MODE__exec_configure>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers <interface>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     <nve>nve1</nve>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     <__XML__MODE_if-nve>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers         <member>no member vni 9000</member>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers     </__XML__MODE_if-nve>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers </interface>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers 
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers           </__XML__MODE__exec_configure>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers         </configure>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers       </config>
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers . Reason: ERROR: VNI delete validation failed
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers .
  2014-12-03 18:03:38.433 TRACE neutron.plugins.ml2.managers 
  2014-12-03 18:03:38.435 ERROR neutron.plugins.ml2.plugin [req-dda788e5-759f-4caf-81f6-a31b43025ede demo f0fd7da7d2874c1590a0092aab9014c3] mechanism_manager.delete_port_postcommit failed for port da89ec67-e825-4a52-8dfa-6a2556624a9e

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Follow ups

[Bug 1399453] Re: Nexus VXLAN gateway: VM with 2 interfaces to the same subnet delete issues
From: Armando Migliaccio, 2015-10-01
[Bug 1399453] [NEW] Nexus VXLAN gateway: VM with 2 interfaces to the same subnet delete issues
From: Danny Choi, 2014-12-04
References

[Bug 1399453] [NEW] Nexus VXLAN gateway: VM with 2 interfaces to the same subnet delete issues
From: Danny Choi, 2014-12-04