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

Danny Choi Thu, 04 Dec 2014 14:16:20 -0800

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

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