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[Bug 2056195] [NEW] Return 409 at neutron-client conflict

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Public bug reported:

Description
===========
When attaching a stateless and stateful security group to a VM, nova returns a 500 error but it's a user issue and a 409 conflict error should be returned.

Steps to reproduce
==================

1. create network
2. create VM "test-vm" attached to the network
3. may create a statefull security group, but default group should already do
4. openstack securit group create --stateless stateless-group
5. openstack server add security group test-vm stateless-group

Expected result
===============
Nova forwards the 409 error from Neutron with the error description from Neutron.

Actual result
=============
Nova returns: 
Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'neutronclient.common.exceptions.Conflict'> (HTTP 500) (Request-ID: req-c6bbaf50-99b7-4108-98f0-808dfee84933)
 

Environment
===========

1. Exact version of OpenStack you are running. See the following
  list for all releases: http://docs.openstack.org/releases/

# nova-api --version
26.2.2 (Zed)


3. Which networking type did you use?
   (For example: nova-network, Neutron with OpenVSwitch, ...)

Neutron with OVN


Logs & Configs
==============
Stacktrace:

Traceback (most recent call last):,
  File "/usr/local/lib/python3.10/site-packages/nova/api/openstack/wsgi.py", line 658, in wrapped,
    return f(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/nova/api/openstack/compute/security_groups.py", line 437, in _addSecurityGroup,
    return security_group_api.add_to_instance(context, instance,,
  File "/usr/local/lib/python3.10/site-packages/nova/network/security_group_api.py", line 653, in add_to_instance,
    raise e,
  File "/usr/local/lib/python3.10/site-packages/nova/network/security_group_api.py", line 648, in add_to_instance,
    neutron.update_port(port['id'], {'port': updated_port}),
  File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
    ret = obj(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 828, in update_port,
    return self._update_resource(self.port_path % (port), body=body,,
  File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
    ret = obj(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 2548, in _update_resource,
    return self.put(path, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
    ret = obj(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 365, in put,
    return self.retry_request("PUT", action, body=body,,
  File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
    ret = obj(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 333, in retry_request,
    return self.do_request(method, action, body=body,,
  File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
    ret = obj(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 297, in do_request,
    self._handle_fault_response(status_code, replybody, resp),
  File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
    ret = obj(*args, **kwargs),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 272, in _handle_fault_response,
    exception_handler_v20(status_code, error_body),
  File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 90, in exception_handler_v20,
    raise client_exc(message=error_message,, neutronclient.common.exceptions.Conflict: 
	Error Cannot apply both stateful and stateless security groups on the same port at the same time while attempting the operation., 
	Neutron server returns request_ids: ['req-1007ffaa-3501-4566-9ad9-c540931138f0']

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2056195

Title:
  Return 409 at neutron-client conflict

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========
  When attaching a stateless and stateful security group to a VM, nova returns a 500 error but it's a user issue and a 409 conflict error should be returned.

  Steps to reproduce
  ==================

  1. create network
  2. create VM "test-vm" attached to the network
  3. may create a statefull security group, but default group should already do
  4. openstack securit group create --stateless stateless-group
  5. openstack server add security group test-vm stateless-group

  Expected result
  ===============
  Nova forwards the 409 error from Neutron with the error description from Neutron.

  Actual result
  =============
  Nova returns: 
  Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'neutronclient.common.exceptions.Conflict'> (HTTP 500) (Request-ID: req-c6bbaf50-99b7-4108-98f0-808dfee84933)
   

  Environment
  ===========

  1. Exact version of OpenStack you are running. See the following
    list for all releases: http://docs.openstack.org/releases/

  # nova-api --version
  26.2.2 (Zed)

  
  3. Which networking type did you use?
     (For example: nova-network, Neutron with OpenVSwitch, ...)

  Neutron with OVN

  
  Logs & Configs
  ==============
  Stacktrace:

  Traceback (most recent call last):,
    File "/usr/local/lib/python3.10/site-packages/nova/api/openstack/wsgi.py", line 658, in wrapped,
      return f(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/nova/api/openstack/compute/security_groups.py", line 437, in _addSecurityGroup,
      return security_group_api.add_to_instance(context, instance,,
    File "/usr/local/lib/python3.10/site-packages/nova/network/security_group_api.py", line 653, in add_to_instance,
      raise e,
    File "/usr/local/lib/python3.10/site-packages/nova/network/security_group_api.py", line 648, in add_to_instance,
      neutron.update_port(port['id'], {'port': updated_port}),
    File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
      ret = obj(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 828, in update_port,
      return self._update_resource(self.port_path % (port), body=body,,
    File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
      ret = obj(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 2548, in _update_resource,
      return self.put(path, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
      ret = obj(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 365, in put,
      return self.retry_request("PUT", action, body=body,,
    File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
      ret = obj(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 333, in retry_request,
      return self.do_request(method, action, body=body,,
    File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
      ret = obj(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 297, in do_request,
      self._handle_fault_response(status_code, replybody, resp),
    File "/usr/local/lib/python3.10/site-packages/nova/network/neutron.py", line 196, in wrapper,
      ret = obj(*args, **kwargs),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 272, in _handle_fault_response,
      exception_handler_v20(status_code, error_body),
    File "/usr/local/lib/python3.10/site-packages/neutronclient/v2_0/client.py", line 90, in exception_handler_v20,
      raise client_exc(message=error_message,, neutronclient.common.exceptions.Conflict: 
  	Error Cannot apply both stateful and stateless security groups on the same port at the same time while attempting the operation., 
  	Neutron server returns request_ids: ['req-1007ffaa-3501-4566-9ad9-c540931138f0']

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Follow ups

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