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Merge "Freescale SDN Mechanism Driver for ML2 Plugin"

changes/06/98706/1
Jenkins 8 years ago committed by Gerrit Code Review
parent
commit
6cde36c7dd
  1. 52
      etc/neutron/plugins/ml2/ml2_conf_fslsdn.ini
  2. 102
      neutron/plugins/ml2/drivers/README.fslsdn
  3. 288
      neutron/plugins/ml2/drivers/mechanism_fslsdn.py
  4. 293
      neutron/tests/unit/ml2/test_mechanism_fslsdn.py
  5. 2
      setup.cfg

52
etc/neutron/plugins/ml2/ml2_conf_fslsdn.ini

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# Defines Configuration options for FSL SDN OS Mechanism Driver
# Cloud Resource Discovery (CRD) authorization credentials
[ml2_fslsdn]
#(StrOpt) User name for authentication to CRD.
# e.g.: user12
#
# crd_user_name =
#(StrOpt) Password for authentication to CRD.
# e.g.: secret
#
# crd_password =
#(StrOpt) Tenant name for CRD service.
# e.g.: service
#
# crd_tenant_name =
#(StrOpt) CRD auth URL.
# e.g.: http://127.0.0.1:5000/v2.0/
#
# crd_auth_url =
#(StrOpt) URL for connecting to CRD Service.
# e.g.: http://127.0.0.1:9797
#
# crd_url=
#(IntOpt) Timeout value for connecting to CRD service
# in seconds, e.g.: 30
#
# crd_url_timeout=
#(StrOpt) Region name for connecting to CRD in
# admin context, e.g.: RegionOne
#
# crd_region_name=
#(BoolOpt)If set, ignore any SSL validation issues (boolean value)
# e.g.: False
#
# crd_api_insecure=
#(StrOpt)Authorization strategy for connecting to CRD in admin
# context, e.g.: keystone
#
# crd_auth_strategy=
#(StrOpt)Location of CA certificates file to use for CRD client
# requests.
#
# crd_ca_certificates_file=

102
neutron/plugins/ml2/drivers/README.fslsdn

@ -0,0 +1,102 @@
=====================================================
Freescale SDN Mechanism Driver for Neutron ML2 plugin
=====================================================
Introduction
============
Freescale SDN (FSL-SDN) Mechanism Driver is an add-on support for ML2 plugin
for Neutron.
It supports the Cloud Resource Discovery (CRD) service by updating
Network, Subnet and Port Create/Update/Delete data into the CRD database.
CRD service manages network nodes, virtual network appliances and openflow
controller based network applications.
Basic work flow
---------------
::
+---------------------------------+
| |
| Neutron Server |
| (with ML2 plugin) |
| |
| +-------------------------------+
| | Freescale SDN |
| | Mechanism Driver |
+-+--------+----------------------+
|
| ReST API
|
+----------+-------------+
| CRD server |
+------------------------+
How does Freescale SDN Mechanism Driver work?
===========================================
- Freescale Mechanism driver handles the following postcommit operations.
- Network create/update/delete
- Subnet create/update/delete
- Port create/delete
Sequence diagram : create_network
---------------------------------
::
create_network
{
neutron -> ML2_plugin
ML2_plugin -> FSL-SDN-MD
FSL-SDN-MD -> crd_service
FSL-SDN-MD <-- crd_service
ML2_plugin <-- FSL-SDN-MD
neutron <-- ML2_plugin
}
- Supported network types by FSL OF Controller include vlan and vxlan.
- Freescale SDN mechanism driver handles VM port binding within in the
mechanism driver (like ODL MD).
- 'bind_port' function verifies the supported network types (vlan,vxlan)
and calls context.set_binding with binding details.
- Flow management in OVS is handled by Freescale Openflow Controller.
How to use Freescale SDN Mechanism Driver?
==========================================
Configuring ML2 Plugin
----------------------
In [ml2] section of /etc/neutron/plugins/ml2/ml2_conf.ini,
modify 'mechanism_drivers' attributes as:
::
mechanism_drivers = fslsdn
Configuring FSLSDN Mechanism Driver
-----------------------------------
Update /etc/neutron/plugins/ml2/ml2_conf_fslsdn.ini, as below.
::
[ml2_fslsdn]
crd_auth_strategy = keystone
crd_url = http://127.0.0.1:9797
crd_auth_url = http://127.0.0.1:5000/v2.0/
crd_tenant_name = service
crd_password = <-service-password->
crd_user_name = <-service-username->
CRD service must be running in the controller.

288
neutron/plugins/ml2/drivers/mechanism_fslsdn.py

@ -0,0 +1,288 @@
# Copyright (c) 2014 Freescale Semiconductor
#
# 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.
# @author: Trinath Somanchi, Freescale, Inc
from neutronclient.v2_0 import client
from oslo.config import cfg
from neutron.common import constants as n_const
from neutron.common import log
from neutron.extensions import portbindings
from neutron.openstack.common import log as logging
from neutron.plugins.common import constants
from neutron.plugins.ml2 import driver_api as api
LOG = logging.getLogger(__name__)
# CRD service options required for FSL SDN OS Mech Driver
ml2_fslsdn_opts = [
cfg.StrOpt('crd_user_name', default='crd',
help=_("CRD service Username")),
cfg.StrOpt('crd_password', default='password',
secret='True',
help=_("CRD Service Password")),
cfg.StrOpt('crd_tenant_name', default='service',
help=_("CRD Tenant Name")),
cfg.StrOpt('crd_auth_url',
default='http://127.0.0.1:5000/v2.0/',
help=_("CRD Auth URL")),
cfg.StrOpt('crd_url',
default='http://127.0.0.1:9797',
help=_("URL for connecting to CRD service")),
cfg.IntOpt('crd_url_timeout',
default=30,
help=_("Timeout value for connecting to "
"CRD service in seconds")),
cfg.StrOpt('crd_region_name',
default='RegionOne',
help=_("Region name for connecting to "
"CRD Service in admin context")),
cfg.BoolOpt('crd_api_insecure',
default=False,
help=_("If set, ignore any SSL validation issues")),
cfg.StrOpt('crd_auth_strategy',
default='keystone',
help=_("Auth strategy for connecting to "
"neutron in admin context")),
cfg.StrOpt('crd_ca_certificates_file',
help=_("Location of ca certificates file to use for "
"CRD client requests.")),
]
# Register the configuration option for crd service
# required for FSL SDN OS Mechanism driver
cfg.CONF.register_opts(ml2_fslsdn_opts, "ml2_fslsdn")
# shortcut
FSLCONF = cfg.CONF.ml2_fslsdn
SERVICE_TYPE = 'crd'
class FslsdnMechanismDriver(api.MechanismDriver):
"""Freescale SDN OS Mechanism Driver for ML2 Plugin."""
@log.log
def initialize(self):
"""Initialize the Mechanism driver."""
self.vif_type = portbindings.VIF_TYPE_OVS
self.vif_details = {portbindings.CAP_PORT_FILTER: True}
LOG.info(_("Initializing CRD client... "))
crd_client_params = {
'username': FSLCONF.crd_user_name,
'tenant_name': FSLCONF.crd_tenant_name,
'region_name': FSLCONF.crd_region_name,
'password': FSLCONF.crd_password,
'auth_url': FSLCONF.crd_auth_url,
'auth_strategy': FSLCONF.crd_auth_strategy,
'endpoint_url': FSLCONF.crd_url,
'timeout': FSLCONF.crd_url_timeout,
'insecure': FSLCONF.crd_api_insecure,
'service_type': SERVICE_TYPE,
'ca_cert': FSLCONF.crd_ca_certificates_file,
}
self._crdclient = client.Client(**crd_client_params)
# Network Management
@staticmethod
@log.log
def _prepare_crd_network(network, segments):
"""Helper function to create 'network' data."""
return {'network':
{'network_id': network['id'],
'tenant_id': network['tenant_id'],
'name': network['name'],
'status': network['status'],
'admin_state_up': network['admin_state_up'],
'segments': segments,
}}
def create_network_postcommit(self, context):
"""Send create_network data to CRD service."""
network = context.current
segments = context.network_segments
body = self._prepare_crd_network(network, segments)
self._crdclient.create_network(body=body)
LOG.debug("create_network update sent to CRD Server: %s", body)
def update_network_postcommit(self, context):
"""Send update_network data to CRD service."""
network = context.current
segments = context.network_segments
body = self._prepare_crd_network(network, segments)
self._crdclient.update_network(network['id'], body=body)
LOG.debug("update_network update sent to CRD Server: %s", body)
def delete_network_postcommit(self, context):
"""Send delete_network data to CRD service."""
network = context.current
self._crdclient.delete_network(network['id'])
LOG.debug(
"delete_network update sent to CRD Server: %s",
network['id'])
# Port Management
@staticmethod
def _prepare_crd_port(port):
"""Helper function to prepare 'port' data."""
crd_subnet_id = ''
crd_ipaddress = ''
crd_sec_grps = ''
# Since CRD accepts one Fixed IP,
# so handle only one fixed IP per port.
if len(port['fixed_ips']) > 1:
LOG.debug("More than one fixed IP exists - using first one.")
# check empty fixed_ips list, move on if one or more exists
if len(port['fixed_ips']) != 0:
crd_subnet_id = port['fixed_ips'][0]['subnet_id']
crd_ipaddress = port['fixed_ips'][0]['ip_address']
LOG.debug("Handling fixed IP {subnet_id:%(subnet)s, "
"ip_address:%(ip)s}",
{'subnet': crd_subnet_id, 'ip': crd_ipaddress})
else:
LOG.debug("No fixed IPs found.")
if 'security_groups' in port:
crd_sec_grps = ','.join(port['security_groups'])
return {'port':
{'port_id': port['id'],
'tenant_id': port['tenant_id'],
'name': port['name'],
'network_id': port['network_id'],
'subnet_id': crd_subnet_id,
'mac_address': port['mac_address'],
'device_id': port['device_id'],
'ip_address': crd_ipaddress,
'admin_state_up': port['admin_state_up'],
'status': port['status'],
'device_owner': port['device_owner'],
'security_groups': crd_sec_grps,
}}
def create_port_postcommit(self, context):
"""Send create_port data to CRD service."""
port = context.current
body = self._prepare_crd_port(port)
self._crdclient.create_port(body=body)
LOG.debug("create_port update sent to CRD Server: %s", body)
def delete_port_postcommit(self, context):
"""Send delete_port data to CRD service."""
port = context.current
self._crdclient.delete_port(port['id'])
LOG.debug("delete_port update sent to CRD Server: %s", port['id'])
# Subnet Management
@staticmethod
@log.log
def _prepare_crd_subnet(subnet):
"""Helper function to prepare 'subnet' data."""
crd_allocation_pools = ''
crd_dns_nameservers = ''
crd_host_routes = ''
# Handling Allocation IPs
if 'allocation_pools' in subnet:
a_pools = subnet['allocation_pools']
crd_allocation_pools = ','.join(["%s-%s" % (p['start'],
p['end'])
for p in a_pools])
# Handling Host Routes
if 'host_routes' in subnet:
crd_host_routes = ','.join(["%s-%s" % (r['destination'],
r['nexthop'])
for r in subnet['host_routes']])
# Handling DNS Nameservers
if 'dns_nameservers' in subnet:
crd_dns_nameservers = ','.join(subnet['dns_nameservers'])
# return Subnet Data
return {'subnet':
{'subnet_id': subnet['id'],
'tenant_id': subnet['tenant_id'],
'name': subnet['name'],
'network_id': subnet['network_id'],
'ip_version': subnet['ip_version'],
'cidr': subnet['cidr'],
'gateway_ip': subnet['gateway_ip'],
'dns_nameservers': crd_dns_nameservers,
'allocation_pools': crd_allocation_pools,
'host_routes': crd_host_routes,
}}
def create_subnet_postcommit(self, context):
"""Send create_subnet data to CRD service."""
subnet = context.current
body = self._prepare_crd_subnet(subnet)
self._crdclient.create_subnet(body=body)
LOG.debug("create_subnet update sent to CRD Server: %s", body)
def update_subnet_postcommit(self, context):
"""Send update_subnet data to CRD service."""
subnet = context.current
body = self._prepare_crd_subnet(subnet)
self._crdclient.update_subnet(subnet['id'], body=body)
LOG.debug("update_subnet update sent to CRD Server: %s", body)
def delete_subnet_postcommit(self, context):
"""Send delete_subnet data to CRD service."""
subnet = context.current
self._crdclient.delete_subnet(subnet['id'])
LOG.debug("delete_subnet update sent to CRD Server: %s", subnet['id'])
def bind_port(self, context):
"""Set porting binding data for use with nova."""
LOG.debug("Attempting to bind port %(port)s on "
"network %(network)s",
{'port': context.current['id'],
'network': context.network.current['id']})
# Prepared porting binding data
for segment in context.network.network_segments:
if self.check_segment(segment):
context.set_binding(segment[api.ID],
self.vif_type,
self.vif_details,
status=n_const.PORT_STATUS_ACTIVE)
LOG.debug("Bound using segment: %s", segment)
return
else:
LOG.debug("Refusing to bind port for segment ID %(id)s, "
"segment %(seg)s, phys net %(physnet)s, and "
"network type %(nettype)s",
{'id': segment[api.ID],
'seg': segment[api.SEGMENTATION_ID],
'physnet': segment[api.PHYSICAL_NETWORK],
'nettype': segment[api.NETWORK_TYPE]})
@log.log
def check_segment(self, segment):
"""Verify a segment is valid for the FSL SDN MechanismDriver."""
return segment[api.NETWORK_TYPE] in [constants.TYPE_VLAN,
constants.TYPE_VXLAN]

293
neutron/tests/unit/ml2/test_mechanism_fslsdn.py

@ -0,0 +1,293 @@
# Copyright (c) 2014 Freescale, Inc.
#
# 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.
# @author: Trinath Somanchi, Freescale, Inc.
import mock
from oslo.config import cfg
from neutron.extensions import portbindings
from neutron.plugins.ml2.drivers import mechanism_fslsdn
from neutron.tests import base
from neutron.tests.unit import test_db_plugin
"""Unit testing for Freescale SDN mechanism driver."""
def setup_driver_config():
"""Mechanism Driver specific configuration."""
# Configure mechanism driver as 'fslsdn'
cfg.CONF.set_override('mechanism_drivers', ['fslsdn'], 'ml2')
# Configure FSL SDN Mechanism driver specific options
cfg.CONF.set_override('crd_user_name', 'crd', 'ml2_fslsdn')
cfg.CONF.set_override('crd_password', 'CRD_PASS', 'ml2_fslsdn')
cfg.CONF.set_override('crd_tenant_name', 'service', 'ml2_fslsdn')
cfg.CONF.set_override('crd_auth_url',
'http://127.0.0.1:5000/v2.0', 'ml2_fslsdn')
cfg.CONF.set_override('crd_url',
'http://127.0.0.1:9797', 'ml2_fslsdn')
cfg.CONF.set_override('crd_auth_strategy', 'keystone', 'ml2_fslsdn')
class TestFslSdnMechDriverV2(test_db_plugin.NeutronDbPluginV2TestCase):
"""Testing mechanism driver with ML2 plugin."""
def setUp(self):
setup_driver_config()
def mocked_fslsdn_init(self):
# Mock CRD client, since it requires CRD service running.
self._crdclieint = mock.Mock()
with mock.patch.object(mechanism_fslsdn.FslsdnMechanismDriver,
'initialize', new=mocked_fslsdn_init):
super(TestFslSdnMechDriverV2, self).setUp()
class TestFslSdnMechDriverNetworksV2(test_db_plugin.TestNetworksV2,
TestFslSdnMechDriverV2):
pass
class TestFslSdnMechDriverPortsV2(test_db_plugin.TestPortsV2,
TestFslSdnMechDriverV2):
VIF_TYPE = portbindings.VIF_TYPE_OVS
CAP_PORT_FILTER = True
class TestFslSdnMechDriverSubnetsV2(test_db_plugin.TestSubnetsV2,
TestFslSdnMechDriverV2):
pass
class TestFslSdnMechanismDriver(base.BaseTestCase):
"""Testing FSL SDN Mechanism driver."""
def setUp(self):
super(TestFslSdnMechanismDriver, self).setUp()
setup_driver_config()
self.driver = mechanism_fslsdn.FslsdnMechanismDriver()
self.driver.initialize()
self.client = self.driver._crdclient = mock.Mock()
def test_create_update_delete_network_postcommit(self):
"""Testing create/update/delete network postcommit operations."""
tenant_id = 'test'
network_id = '123'
segmentation_id = 456
expected_seg = [{'segmentation_id': segmentation_id}]
expected_crd_network = {'network':
{'network_id': network_id,
'tenant_id': tenant_id,
'name': 'FakeNetwork',
'status': 'ACTIVE',
'admin_state_up': True,
'segments': expected_seg}}
network_context = self._get_network_context(tenant_id, network_id,
segmentation_id)
network = network_context.current
segments = network_context.network_segments
net_id = network['id']
req = self.driver._prepare_crd_network(network, segments)
# test crd network dict
self.assertEqual(expected_crd_network, req)
# test create_network.
self.driver.create_network_postcommit(network_context)
self.client.create_network.assert_called_once_with(body=req)
# test update_network.
self.driver.update_network_postcommit(network_context)
self.client.update_network.assert_called_once_with(net_id, body=req)
# test delete_network.
self.driver.delete_network_postcommit(network_context)
self.client.delete_network.assert_called_once_with(net_id)
def test_create_update_delete_subnet_postcommit(self):
"""Testing create/update/delete subnet postcommit operations."""
tenant_id = 'test'
network_id = '123'
subnet_id = '122'
cidr = '192.0.0.0/8'
gateway_ip = '192.0.0.1'
expected_crd_subnet = {'subnet':
{'subnet_id': subnet_id, 'tenant_id': tenant_id,
'name': 'FakeSubnet', 'network_id': network_id,
'ip_version': 4, 'cidr': cidr,
'gateway_ip': gateway_ip,
'dns_nameservers': '',
'allocation_pools': '',
'host_routes': ''}}
subnet_context = self._get_subnet_context(tenant_id, network_id,
subnet_id, cidr, gateway_ip)
subnet = subnet_context.current
subnet_id = subnet['id']
req = self.driver._prepare_crd_subnet(subnet)
# test crd subnet dict
self.assertEqual(expected_crd_subnet, req)
# test create_subnet.
self.driver.create_subnet_postcommit(subnet_context)
self.client.create_subnet.assert_called_once_with(body=req)
# test update_subnet.
self.driver.update_subnet_postcommit(subnet_context)
self.client.update_subnet.assert_called_once_with(subnet_id, body=req)
# test delete_subnet.
self.driver.delete_subnet_postcommit(subnet_context)
self.client.delete_subnet.assert_called_once_with(subnet_id)
def test_create_delete_port_postcommit(self):
"""Testing create/delete port postcommit operations."""
tenant_id = 'test'
network_id = '123'
port_id = '453'
expected_crd_port = {'port':
{'port_id': port_id, 'tenant_id': tenant_id,
'name': 'FakePort', 'network_id': network_id,
'subnet_id': '', 'mac_address': 'aabb',
'device_id': '1234', 'ip_address': '',
'admin_state_up': True, 'status': 'ACTIVE',
'device_owner': 'compute',
'security_groups': ''}}
# Test with empty fixed IP
port_context = self._get_port_context(tenant_id, network_id, port_id)
port = port_context.current
req = self.driver._prepare_crd_port(port)
# Test crd port dict
self.assertEqual(expected_crd_port, req)
# test create_port.
self.driver.create_port_postcommit(port_context)
self.client.create_port.assert_called_once_with(body=req)
# Test delete_port
self.driver.delete_port_postcommit(port_context)
self.client.delete_port.assert_called_once_with(port['id'])
def test_prepare_port_with_single_fixed_ip(self):
"""Test _prepare_crd_port with single fixed_ip."""
tenant_id = 'test'
network_id = '123'
port_id = '453'
fips = [{"subnet_id": "sub-1", "ip_address": "10.0.0.1"}]
expected_crd_port = {'port':
{'port_id': port_id, 'tenant_id': tenant_id,
'name': 'FakePort', 'network_id': network_id,
'subnet_id': '', 'mac_address': 'aabb',
'device_id': '1234', 'ip_address': '',
'admin_state_up': True, 'status': 'ACTIVE',
'device_owner': 'compute',
'security_groups': ''}}
port_context = self._get_port_context(tenant_id, network_id, port_id,
fips)
port = port_context.current
req = self.driver._prepare_crd_port(port)
expected_crd_port['port']['subnet_id'] = 'sub-1'
expected_crd_port['port']['ip_address'] = '10.0.0.1'
self.assertEqual(expected_crd_port, req)
def test_prepare_port_with_multiple_fixed_ips(self):
"""Test _prepare_crd_port with multiple fixed_ips."""
tenant_id = 'test'
network_id = '123'
port_id = '453'
multiple_fips = [{"subnet_id": "sub-1", "ip_address": "10.0.0.1"},
{"subnet_id": "sub-1", "ip_address": "10.0.0.4"}]
expected_crd_port = {'port':
{'port_id': port_id, 'tenant_id': tenant_id,
'name': 'FakePort', 'network_id': network_id,
'subnet_id': '', 'mac_address': 'aabb',
'device_id': '1234', 'ip_address': '',
'admin_state_up': True, 'status': 'ACTIVE',
'device_owner': 'compute',
'security_groups': ''}}
port_context = self._get_port_context(tenant_id, network_id, port_id,
multiple_fips)
port = port_context.current
req = self.driver._prepare_crd_port(port)
expected_crd_port['port']['subnet_id'] = 'sub-1'
expected_crd_port['port']['ip_address'] = '10.0.0.1'
self.assertEqual(expected_crd_port, req)
def _get_subnet_context(self, tenant_id, net_id, subnet_id, cidr,
gateway_ip):
# sample data for testing purpose only.
subnet = {'tenant_id': tenant_id,
'network_id': net_id,
'id': subnet_id,
'cidr': cidr,
'name': 'FakeSubnet',
'ip_version': 4,
'gateway_ip': gateway_ip,
}
return FakeContext(subnet)
def _get_port_context(self, tenant_id, net_id, port_id,
fixed_ips=[]):
# sample data for testing purpose only
port = {'device_id': '1234',
'name': 'FakePort',
'mac_address': 'aabb',
'device_owner': 'compute',
'tenant_id': tenant_id,
'id': port_id,
'fixed_ips': fixed_ips,
'admin_state_up': True,
'status': 'ACTIVE',
'network_id': net_id}
return FakeContext(port)
def _get_network_context(self, tenant_id, net_id, seg_id):
# sample data for testing purpose only.
network = {'id': net_id,
'tenant_id': tenant_id,
'admin_state_up': True,
'status': 'ACTIVE',
'name': 'FakeNetwork', }
segments = [{'segmentation_id': seg_id}]
return FakeNetworkContext(network, segments)
class FakeNetworkContext(object):
"""To generate network context for testing purposes only."""
def __init__(self, network, segments):
self._network = network
self._segments = segments
@property
def current(self):
return self._network
@property
def network_segments(self):
return self._segments
class FakeContext(object):
"""To generate context for testing purposes only."""
def __init__(self, record):
self._record = record
@property
def current(self):
return self._record

2
setup.cfg

@ -70,6 +70,7 @@ data_files =
etc/neutron/plugins/ml2/ml2_conf_ncs.ini
etc/neutron/plugins/ml2/ml2_conf_odl.ini
etc/neutron/plugins/ml2/ml2_conf_ofa.ini
etc/neutron/plugins/ml2/ml2_conf_fslsdn.ini
etc/neutron/plugins/mlnx = etc/neutron/plugins/mlnx/mlnx_conf.ini
etc/neutron/plugins/nec = etc/neutron/plugins/nec/nec.ini
etc/neutron/plugins/nuage = etc/neutron/plugins/nuage/nuage_plugin.ini
@ -163,6 +164,7 @@ neutron.ml2.mechanism_drivers =
ofagent = neutron.plugins.ml2.drivers.mech_ofagent:OfagentMechanismDriver
mlnx = neutron.plugins.ml2.drivers.mlnx.mech_mlnx:MlnxMechanismDriver
brocade = neutron.plugins.ml2.drivers.brocade.mechanism_brocade:BrocadeMechanism
fslsdn = neutron.plugins.ml2.drivers.mechanism_fslsdn:FslsdnMechanismDriver
neutron.openstack.common.cache.backends =
memory = neutron.openstack.common.cache._backends.memory:MemoryBackend

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