x
/
vmware-nsx
Code Issues Proposed changes

NSXV+NSXV3: add support for pluggable extensions 

A new configuration variable nsx_extension_drivers
has been added. This is in the DEFAULT section. This enable us
to code support to add via configurations extensions, for
example dns_integration.

Co-authored-by: Shih-Hao Li <shihli@vmware.com>

Change-Id: Iea4715522d9c7cf327b7f1a751b78f14d5e06e75
This commit is contained in:
Shih-Hao Li 2017-01-12 09:28:56 -08:00 committed by garyk
parent 95231630f2
commit 8c77175ee9
7 changed files with 419 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
releasenotes/notes/nsx-extension-drivers-b1aedabe5296d4d0.yaml Normal file
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@ -0,0 +1,7 @@
---
prelude: >
We have added a new configuration variable that will enable us to
enable existing extensions. The new configuration variable is
``nsx_extension_drivers``. This is in the default section.
This is a list of extansion names. The code for the drivers
must be in the directory vmware_nsx.extension_drivers.

5
vmware_nsx/common/config.py
View File

@ -245,6 +245,11 @@ nsx_common_opts = [
"specify the id of resources. This should only "
"be enabled in order to allow one to migrate an "
"existing install of neutron to the nsx-v3 plugin.")),
cfg.ListOpt('nsx_extension_drivers',
default=[],
help=_("An ordered list of extension driver "
"entrypoints to be loaded from the "
"vmware_nsx.extension_drivers namespace.")),
]
nsx_v3_opts = [

157
vmware_nsx/common/driver_api.py Normal file
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@ -0,0 +1,157 @@
# Copyright (c) 2013 OpenStack Foundation
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import abc
import six
@six.add_metaclass(abc.ABCMeta)
class ExtensionDriver(object):
"""Define stable abstract interface for extension drivers.
An extension driver extends the core resources implemented by the
plugin with additional attributes. Methods that process create
and update operations for these resources validate and persist
values for extended attributes supplied through the API. Other
methods extend the resource dictionaries returned from the API
operations with the values of the extended attributes.
"""
@abc.abstractmethod
def initialize(self):
"""Perform driver initialization.
Called after all drivers have been loaded and the database has
been initialized. No abstract methods defined below will be
called prior to this method being called.
"""
pass
@property
def extension_alias(self):
"""Supported extension alias.
Return the alias identifying the core API extension supported
by this driver. Do not declare if API extension handling will
be left to a service plugin, and we just need to provide
core resource extension and updates.
"""
pass
def process_create_network(self, plugin_context, data, result):
"""Process extended attributes for create network.
:param plugin_context: plugin request context
:param data: dictionary of incoming network data
:param result: network dictionary to extend
Called inside transaction context on plugin_context.session to
validate and persist any extended network attributes defined by this
driver. Extended attribute values must also be added to
result.
"""
pass
def process_create_subnet(self, plugin_context, data, result):
"""Process extended attributes for create subnet.
:param plugin_context: plugin request context
:param data: dictionary of incoming subnet data
:param result: subnet dictionary to extend
Called inside transaction context on plugin_context.session to
validate and persist any extended subnet attributes defined by this
driver. Extended attribute values must also be added to
result.
"""
pass
def process_create_port(self, plugin_context, data, result):
"""Process extended attributes for create port.
:param plugin_context: plugin request context
:param data: dictionary of incoming port data
:param result: port dictionary to extend
Called inside transaction context on plugin_context.session to
validate and persist any extended port attributes defined by this
driver. Extended attribute values must also be added to
result.
"""
pass
def process_update_network(self, plugin_context, data, result):
"""Process extended attributes for update network.
:param plugin_context: plugin request context
:param data: dictionary of incoming network data
:param result: network dictionary to extend
Called inside transaction context on plugin_context.session to
validate and update any extended network attributes defined by this
driver. Extended attribute values, whether updated or not,
must also be added to result.
"""
pass
def process_update_subnet(self, plugin_context, data, result):
"""Process extended attributes for update subnet.
:param plugin_context: plugin request context
:param data: dictionary of incoming subnet data
:param result: subnet dictionary to extend
Called inside transaction context on plugin_context.session to
validate and update any extended subnet attributes defined by this
driver. Extended attribute values, whether updated or not,
must also be added to result.
"""
pass
def process_update_port(self, plugin_context, data, result):
"""Process extended attributes for update port.
:param plugin_context: plugin request context
:param data: dictionary of incoming port data
:param result: port dictionary to extend
Called inside transaction context on plugin_context.session to
validate and update any extended port attributes defined by this
driver. Extended attribute values, whether updated or not,
must also be added to result.
"""
pass
def extend_network_dict(self, session, base_model, result):
"""Add extended attributes to network dictionary.
:param session: database session
:param base_model: network model data
:param result: network dictionary to extend
Called inside transaction context on session to add any
extended attributes defined by this driver to a network
dictionary to be used for driver calls and/or
returned as the result of a network operation.
"""
pass
def extend_subnet_dict(self, session, base_model, result):
"""Add extended attributes to subnet dictionary.
:param session: database session
:param base_model: subnet model data
:param result: subnet dictionary to extend
Called inside transaction context on session to add any
extended attributes defined by this driver to a subnet
dictionary to be used for driver calls and/or
returned as the result of a subnet operation.
"""
pass
def extend_port_dict(self, session, base_model, result):
"""Add extended attributes to port dictionary.
:param session: database session
:param base_model: port model data
:param result: port dictionary to extend
Called inside transaction context on session to add any
extended attributes defined by this driver to a port
dictionary to be used for driver calls
and/or returned as the result of a port operation.
"""
pass

134
vmware_nsx/common/managers.py Normal file
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@ -0,0 +1,134 @@
# Copyright (c) 2013 OpenStack Foundation
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_config import cfg
from oslo_log import log
from oslo_utils import excutils
import stevedore
from vmware_nsx._i18n import _LE, _LI
LOG = log.getLogger(__name__)
class ExtensionManager(stevedore.named.NamedExtensionManager):
"""Manage extension drivers using drivers."""
def __init__(self):
# Ordered list of extension drivers, defining
# the order in which the drivers are called.
self.ordered_ext_drivers = []
LOG.info(_LI("Configured extension driver names: %s"),
cfg.CONF.nsx_extension_drivers)
super(ExtensionManager, self).__init__('vmware_nsx.extension_drivers',
cfg.CONF.nsx_extension_drivers,
invoke_on_load=True,
name_order=True)
LOG.info(_LI("Loaded extension driver names: %s"), self.names())
self._register_drivers()
def _register_drivers(self):
"""Register all extension drivers.
This method should only be called once in the ExtensionManager
constructor.
"""
for ext in self:
self.ordered_ext_drivers.append(ext)
LOG.info(_LI("Registered extension drivers: %s"),
[driver.name for driver in self.ordered_ext_drivers])
def initialize(self):
# Initialize each driver in the list.
for driver in self.ordered_ext_drivers:
LOG.info(_LI("Initializing extension driver '%s'"), driver.name)
driver.obj.initialize()
def extension_aliases(self):
exts = []
for driver in self.ordered_ext_drivers:
alias = driver.obj.extension_alias
if alias:
exts.append(alias)
LOG.info(_LI("Got %(alias)s extension from driver '%(drv)s'"),
{'alias': alias, 'drv': driver.name})
return exts
def _call_on_ext_drivers(self, method_name, plugin_context, data, result):
"""Helper method for calling a method across all extension drivers."""
for driver in self.ordered_ext_drivers:
try:
getattr(driver.obj, method_name)(plugin_context, data, result)
except Exception:
with excutils.save_and_reraise_exception():
LOG.info(_LI("Extension driver '%(name)s' failed in "
"%(method)s"),
{'name': driver.name, 'method': method_name})
def process_create_network(self, plugin_context, data, result):
"""Notify all extension drivers during network creation."""
self._call_on_ext_drivers("process_create_network", plugin_context,
data, result)
def process_update_network(self, plugin_context, data, result):
"""Notify all extension drivers during network update."""
self._call_on_ext_drivers("process_update_network", plugin_context,
data, result)
def process_create_subnet(self, plugin_context, data, result):
"""Notify all extension drivers during subnet creation."""
self._call_on_ext_drivers("process_create_subnet", plugin_context,
data, result)
def process_update_subnet(self, plugin_context, data, result):
"""Notify all extension drivers during subnet update."""
self._call_on_ext_drivers("process_update_subnet", plugin_context,
data, result)
def process_create_port(self, plugin_context, data, result):
"""Notify all extension drivers during port creation."""
self._call_on_ext_drivers("process_create_port", plugin_context,
data, result)
def process_update_port(self, plugin_context, data, result):
"""Notify all extension drivers during port update."""
self._call_on_ext_drivers("process_update_port", plugin_context,
data, result)
def _call_on_dict_driver(self, method_name, session, base_model, result):
for driver in self.ordered_ext_drivers:
try:
getattr(driver.obj, method_name)(session, base_model, result)
except Exception:
LOG.error(_LE("Extension driver '%(name)s' failed in "
"%(method)s"),
{'name': driver.name, 'method': method_name})
raise
def extend_network_dict(self, session, base_model, result):
"""Notify all extension drivers to extend network dictionary."""
self._call_on_dict_driver("extend_network_dict", session, base_model,
result)
def extend_subnet_dict(self, session, base_model, result):
"""Notify all extension drivers to extend subnet dictionary."""
self._call_on_dict_driver("extend_subnet_dict", session, base_model,
result)
def extend_port_dict(self, session, base_model, result):
"""Notify all extension drivers to extend port dictionary."""
self._call_on_dict_driver("extend_port_dict", session, base_model,
result)

16
vmware_nsx/extension_drivers/__init__.py Normal file
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@ -0,0 +1,16 @@
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import os
NSX_EXT_PATH = os.path.join(os.path.dirname(__file__), 'extensions')

55
vmware_nsx/plugins/nsx_v/plugin.py
View File

@ -85,6 +85,7 @@ from vmware_nsx._i18n import _, _LE, _LI, _LW
from vmware_nsx.common import config # noqa
from vmware_nsx.common import exceptions as nsx_exc
from vmware_nsx.common import locking
from vmware_nsx.common import managers as nsx_managers
from vmware_nsx.common import nsx_constants
from vmware_nsx.common import nsxv_constants
from vmware_nsx.common import utils as c_utils
@ -186,11 +187,15 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
router=l3_db_models.Router,
floatingip=l3_db_models.FloatingIP)
def __init__(self):
self._extension_manager = nsx_managers.ExtensionManager()
super(NsxVPluginV2, self).__init__()
self.init_is_complete = False
registry.subscribe(self.init_complete,
resources.PROCESS,
events.AFTER_INIT)
self._extension_manager.initialize()
self.supported_extension_aliases.extend(
self._extension_manager.extension_aliases())
self.metadata_proxy_handler = None
config.validate_nsxv_config_options()
neutron_extensions.append_api_extensions_path(
@ -266,6 +271,16 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
if c_utils.is_nsxv_version_6_2(self.nsx_v.vcns.get_version()):
self.supported_extension_aliases.append("provider-security-group")
# Register extend dict methods for network and port resources.
# Each extension driver that supports extend attribute for the resources
# can add those attribute to the result.
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attr.NETWORKS, ['_ext_extend_network_dict'])
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attr.PORTS, ['_ext_extend_port_dict'])
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attr.SUBNETS, ['_ext_extend_subnet_dict'])
def init_complete(self, resource, event, trigger, **kwargs):
has_metadata_cfg = (
cfg.CONF.nsxv.nova_metadata_ips
@ -334,6 +349,22 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
self.start_rpc_listeners_called = True
return self.conn.consume_in_threads()
def _ext_extend_network_dict(self, result, netdb):
session = db_api.get_session()
with session.begin(subtransactions=True):
self._extension_manager.extend_network_dict(session, netdb, result)
def _ext_extend_port_dict(self, result, portdb):
session = db_api.get_session()
with session.begin(subtransactions=True):
self._extension_manager.extend_port_dict(session, portdb, result)
def _ext_extend_subnet_dict(self, result, subnetdb):
session = db_api.get_session()
with session.begin(subtransactions=True):
self._extension_manager.extend_subnet_dict(
session, subnetdb, result)
def _create_security_group_container(self):
name = "OpenStack Security Group container"
with locking.LockManager.get_lock('security-group-container-init'):
@ -1006,6 +1037,8 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
with context.session.begin(subtransactions=True):
new_net = super(NsxVPluginV2, self).create_network(context,
network)
self._extension_manager.process_create_network(
context, net_data, new_net)
# Process port security extension
self._process_network_port_security_create(
context, net_data, new_net)
@ -1283,6 +1316,8 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
with context.session.begin(subtransactions=True):
net_res = super(NsxVPluginV2, self).update_network(context, id,
network)
self._extension_manager.process_update_network(context, net_attrs,
net_res)
self._process_network_port_security_update(
context, net_attrs, net_res)
self._process_l3_update(context, net_res, net_attrs)
@ -1342,13 +1377,18 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
@db_api.retry_db_errors
def base_create_port(self, context, port):
return super(NsxVPluginV2, self).create_port(context, port)
created_port = super(NsxVPluginV2, self).create_port(context, port)
self._extension_manager.process_create_port(
context, port['port'], created_port)
return created_port
def create_port(self, context, port):
port_data = port['port']
with context.session.begin(subtransactions=True):
# First we allocate port in neutron database
neutron_db = super(NsxVPluginV2, self).create_port(context, port)
self._extension_manager.process_create_port(
context, port_data, neutron_db)
# Port port-security is decided by the port-security state on the
# network it belongs to, unless specifically specified here
if validators.is_attr_set(port_data.get(psec.PORTSECURITY)):
@ -1591,6 +1631,8 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
with context.session.begin(subtransactions=True):
ret_port = super(NsxVPluginV2, self).update_port(
context, id, port)
self._extension_manager.process_update_port(
context, port_data, ret_port)
# copy values over - except fixed_ips as
# they've already been processed
updates_fixed_ips = port['port'].pop('fixed_ips', [])
@ -1994,6 +2036,8 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
with locking.LockManager.get_lock(subnet['subnet']['network_id']):
with locking.LockManager.get_lock('nsx-edge-pool'):
s = super(NsxVPluginV2, self).create_subnet(context, subnet)
self._extension_manager.process_create_subnet(
context, subnet['subnet'], s)
if s['enable_dhcp']:
try:
self._process_subnet_ext_attr_create(
@ -2075,6 +2119,7 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
orig_enable_dhcp=enable_dhcp,
orig_host_routes=orig_host_routes)
subnet = super(NsxVPluginV2, self).update_subnet(context, id, subnet)
self._extension_manager.process_update_subnet(context, s, subnet)
update_dhcp_config = self._process_subnet_ext_attr_update(
context.session, subnet, s)
if (gateway_ip != subnet['gateway_ip'] or update_dhcp_config or
@ -2715,9 +2760,11 @@ class NsxVPluginV2(addr_pair_db.AllowedAddressPairsMixin,
since the actual backend work was already done by the router driver,
and it may cause a deadlock.
"""
super(NsxVPluginV2, self).update_port(context,
router.gw_port['id'],
{'port': {'fixed_ips': ext_ips}})
port_data = {'fixed_ips': ext_ips}
updated_port = super(NsxVPluginV2, self).update_port(
context, router.gw_port['id'], {'port': port_data})
self._extension_manager.process_update_port(
context, port_data, updated_port)
context.session.expire(router.gw_port)
def _update_router_gw_info(self, context, router_id, info,

53
vmware_nsx/plugins/nsx_v3/plugin.py
View File

@ -22,6 +22,7 @@ from neutron.api.rpc.callbacks import resources as callbacks_resources
from neutron.api.rpc.handlers import dhcp_rpc
from neutron.api.rpc.handlers import metadata_rpc
from neutron.api.rpc.handlers import resources_rpc
from neutron.api.v2 import attributes
from neutron.callbacks import events
from neutron.callbacks import exceptions as callback_exc
from neutron.callbacks import registry
@ -33,6 +34,7 @@ from neutron.db import _utils as db_utils
from neutron.db import agents_db
from neutron.db import agentschedulers_db
from neutron.db import allowedaddresspairs_db as addr_pair_db
from neutron.db import api as db_api
from neutron.db import db_base_plugin_v2
from neutron.db import dns_db
from neutron.db import external_net_db
@ -77,6 +79,7 @@ from vmware_nsx.api_replay import utils as api_replay_utils
from vmware_nsx.common import config # noqa
from vmware_nsx.common import exceptions as nsx_exc
from vmware_nsx.common import locking
from vmware_nsx.common import managers
from vmware_nsx.common import utils
from vmware_nsx.db import db as nsx_db
from vmware_nsx.db import extended_security_group
@ -166,9 +169,12 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
router=l3_db_models.Router,
floatingip=l3_db_models.FloatingIP)
def __init__(self):
self._extension_manager = managers.ExtensionManager()
super(NsxV3Plugin, self).__init__()
LOG.info(_LI("Starting NsxV3Plugin"))
self._extension_manager.initialize()
self.supported_extension_aliases.extend(
self._extension_manager.extension_aliases())
self.nsxlib = v3_utils.get_nsxlib_wrapper()
# reinitialize the cluster upon fork for api workers to ensure each
# process has its own keepalive loops + state
@ -224,6 +230,16 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
# Register NSXv3 trunk driver to support trunk extensions
self.trunk_driver = trunk_driver.NsxV3TrunkDriver.create(self)
# Register extend dict methods for network and port resources.
# Each extension driver that supports extend attribute for the resources
# can add those attribute to the result.
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attributes.NETWORKS, ['_ext_extend_network_dict'])
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attributes.PORTS, ['_ext_extend_port_dict'])
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
attributes.SUBNETS, ['_ext_extend_subnet_dict'])
def _init_nsx_profiles(self):
LOG.debug("Initializing NSX v3 port spoofguard switching profile")
if not self._init_port_security_profile():
@ -538,6 +554,22 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
return self.conn.consume_in_threads()
def _ext_extend_network_dict(self, result, netdb):
session = db_api.get_session()
with session.begin(subtransactions=True):
self._extension_manager.extend_network_dict(session, netdb, result)
def _ext_extend_port_dict(self, result, portdb):
session = db_api.get_session()
with session.begin(subtransactions=True):
self._extension_manager.extend_port_dict(session, portdb, result)
def _ext_extend_subnet_dict(self, result, subnetdb):
session = db_api.get_session()
with session.begin(subtransactions=True):
self._extension_manager.extend_subnet_dict(
session, subnetdb, result)
def _validate_provider_create(self, context, network_data):
is_provider_net = any(
validators.is_attr_set(network_data.get(f))
@ -726,7 +758,8 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
# Create network in Neutron
created_net = super(NsxV3Plugin, self).create_network(context,
network)
self._extension_manager.process_create_network(
context, net_data, created_net)
if psec.PORTSECURITY not in net_data:
net_data[psec.PORTSECURITY] = True
self._process_network_port_security_create(
@ -891,7 +924,8 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
self._assert_on_external_net_with_qos(net_data)
updated_net = super(NsxV3Plugin, self).update_network(context, id,
network)
self._extension_manager.process_update_network(context, net_data,
updated_net)
if psec.PORTSECURITY in network['network']:
self._process_network_port_security_update(
context, network['network'], updated_net)
@ -1201,6 +1235,8 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
if self._has_no_dhcp_enabled_subnet(context, network):
created_subnet = super(
NsxV3Plugin, self).create_subnet(context, subnet)
self._extension_manager.process_create_subnet(context,
subnet['subnet'], created_subnet)
self._enable_native_dhcp(context, network,
created_subnet)
msg = None
@ -1259,6 +1295,8 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
updated_subnet = super(
NsxV3Plugin, self).update_subnet(
context, subnet_id, subnet)
self._extension_manager.process_update_subnet(
context, subnet['subnet'], updated_subnet)
self._enable_native_dhcp(context, network,
updated_subnet)
msg = None
@ -1279,10 +1317,14 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
updated_subnet = super(
NsxV3Plugin, self).update_subnet(
context, subnet_id, subnet)
self._extension_manager.process_update_subnet(
context, subnet['subnet'], updated_subnet)
if not updated_subnet:
updated_subnet = super(NsxV3Plugin, self).update_subnet(
context, subnet_id, subnet)
self._extension_manager.process_update_subnet(
context, subnet['subnet'], updated_subnet)
# Check if needs to update logical DHCP server for native DHCP.
if (cfg.CONF.nsx_v3.native_dhcp_metadata and
@ -1881,6 +1923,8 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
self._assert_on_external_net_port_with_qos(port_data)
neutron_db = super(NsxV3Plugin, self).create_port(context, port)
self._extension_manager.process_create_port(
context, port_data, neutron_db)
port["port"].update(neutron_db)
(is_psec_on, has_ip) = self._create_port_preprocess_security(
@ -2242,7 +2286,8 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
old_mac_learning_state = original_port.get(mac_ext.MAC_LEARNING)
updated_port = super(NsxV3Plugin, self).update_port(context,
id, port)
self._extension_manager.process_update_port(context, port['port'],
updated_port)
# copy values over - except fixed_ips as
# they've already been processed
port['port'].pop('fixed_ips', None)