API's and implementations to support L2 Gateways in Neutron.
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networking-l2gw/networking_l2gw/services/l2gateway/plugin.py

199 lines
8.9 KiB

# Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
# 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 neutron_lib.plugins import directory
from oslo_utils import excutils
from neutron.db import servicetype_db as st_db
from neutron.services import provider_configuration as pconf
from neutron.services import service_base
from networking_l2gw.db.l2gateway import l2gateway_db
from networking_l2gw.services.l2gateway.common import config
from networking_l2gw.services.l2gateway.common import constants
from networking_l2gw.services.l2gateway import exceptions as exc
from neutron_lib import exceptions as n_exc
from oslo_log import log as logging
LOG = logging.getLogger(__name__)
class L2GatewayPlugin(l2gateway_db.L2GatewayMixin):
"""Implementation of the Neutron l2 gateway Service Plugin.
This class manages the workflow of L2 gateway request/response.
"""
supported_extension_aliases = ["l2-gateway",
"l2-gateway-connection"]
def __init__(self):
"""Do the initialization for the l2 gateway service plugin here."""
config.register_l2gw_opts_helper()
self.service_type_manager = st_db.ServiceTypeManager.get_instance()
self.service_type_manager.add_provider_configuration(
constants.L2GW, pconf.ProviderConfiguration('networking_l2gw'))
self._load_drivers()
LOG.info("L2Gateway Service Plugin using Service Driver: %s",
self.default_provider)
self.driver = self.drivers[self.default_provider]
if len(self.drivers) > 1:
LOG.warning("Multiple drivers configured for L2Gateway, "
"although running multiple drivers in parallel"
" is not yet supported")
super(L2GatewayPlugin, self).__init__()
l2gateway_db.subscribe()
def _load_drivers(self):
"""Loads plugin-drivers specified in configuration."""
self.drivers, self.default_provider = service_base.load_drivers(
'L2GW', self)
def _get_driver_for_provider(self, provider):
if provider in self.drivers:
return self.drivers[provider]
# raise if not associated (should never be reached)
raise n_exc.Invalid("Error retrieving driver for provider %s" %
provider)
@property
def _core_plugin(self):
return directory.get_plugin()
def get_plugin_type(self):
"""Get type of the plugin."""
return constants.L2GW
def get_plugin_description(self):
"""Get description of the plugin."""
return constants.L2_GATEWAY_SERVICE_PLUGIN
def add_port_mac(self, context, port_dict):
"""Process a created Neutron port."""
self.driver.add_port_mac(context, port_dict)
def delete_port_mac(self, context, port):
"""Process a deleted Neutron port."""
self.driver.delete_port_mac(context, port)
def create_l2_gateway(self, context, l2_gateway):
"""Create the L2Gateway."""
self.validate_l2_gateway_for_create(context, l2_gateway)
self.driver.create_l2_gateway(context, l2_gateway)
with context.session.begin(subtransactions=True):
l2_gateway_instance = super(L2GatewayPlugin,
self).create_l2_gateway(context,
l2_gateway)
self.driver.create_l2_gateway_precommit(context,
l2_gateway_instance)
try:
self.driver.create_l2_gateway_postcommit(
context, l2_gateway_instance)
except exc.L2GatewayServiceDriverError:
with excutils.save_and_reraise_exception():
LOG.error("L2GatewayPlugin.create_l2_gateway_postcommit "
"failed, deleting l2gateway '%s'",
l2_gateway_instance['id'])
self.delete_l2_gateway(context, l2_gateway_instance['id'])
return l2_gateway_instance
def update_l2_gateway(self, context, l2_gateway_id, l2_gateway):
"""Update the L2Gateway."""
self.validate_l2_gateway_for_update(context, l2_gateway_id, l2_gateway)
self.driver.update_l2_gateway(context, l2_gateway_id, l2_gateway)
with context.session.begin(subtransactions=True):
l2_gateway_instance = super(L2GatewayPlugin,
self).update_l2_gateway(context,
l2_gateway_id,
l2_gateway)
self.driver.update_l2_gateway_precommit(context,
l2_gateway_instance)
try:
self.driver.update_l2_gateway_postcommit(
context, l2_gateway_instance)
except exc.L2GatewayServiceDriverError:
with excutils.save_and_reraise_exception():
LOG.error("L2GatewayPlugin.update_l2_gateway_postcommit"
" failed for l2gateway %s", l2_gateway_id)
return l2_gateway_instance
def delete_l2_gateway(self, context, l2_gateway_id):
"""Delete the L2Gateway."""
self.validate_l2_gateway_for_delete(context, l2_gateway_id)
self.driver.delete_l2_gateway(context, l2_gateway_id)
with context.session.begin(subtransactions=True):
super(L2GatewayPlugin, self).delete_l2_gateway(context,
l2_gateway_id)
self.driver.delete_l2_gateway_precommit(context, l2_gateway_id)
try:
self.driver.delete_l2_gateway_postcommit(context, l2_gateway_id)
except exc.L2GatewayServiceDriverError:
with excutils.save_and_reraise_exception():
LOG.error("L2GatewayPlugin.delete_l2_gateway_postcommit"
" failed for l2gateway %s", l2_gateway_id)
def create_l2_gateway_connection(self, context, l2_gateway_connection):
"""Create an L2Gateway Connection
Bind a Neutron VXLAN Network to Physical Network Segment.
"""
self.validate_l2_gateway_connection_for_create(
context, l2_gateway_connection)
self.driver.create_l2_gateway_connection(context,
l2_gateway_connection)
with context.session.begin(subtransactions=True):
l2_gateway_conn_instance = super(
L2GatewayPlugin, self).create_l2_gateway_connection(
context, l2_gateway_connection)
self.driver.create_l2_gateway_connection_precommit(
context, l2_gateway_conn_instance)
try:
self.driver.create_l2_gateway_connection_postcommit(
context, l2_gateway_conn_instance)
except exc.L2GatewayServiceDriverError:
with excutils.save_and_reraise_exception():
LOG.error("L2GatewayPlugin."
"create_l2_gateway_connection_postcommit "
"failed, deleting connection '%s'",
l2_gateway_conn_instance['id'])
self.delete_l2_gateway_connection(
context, l2_gateway_conn_instance['id'])
return l2_gateway_conn_instance
def delete_l2_gateway_connection(self, context, l2_gateway_connection_id):
"""Delete an L2Gateway Connection
Unbind a Neutron VXLAN Network from Physical Network Segment.
"""
self.validate_l2_gateway_connection_for_delete(
context, l2_gateway_connection_id)
self.driver.delete_l2_gateway_connection(
context, l2_gateway_connection_id)
with context.session.begin(subtransactions=True):
super(L2GatewayPlugin, self).delete_l2_gateway_connection(
context, l2_gateway_connection_id)
self.driver.delete_l2_gateway_connection_precommit(
context, l2_gateway_connection_id)
try:
self.driver.delete_l2_gateway_connection_postcommit(
context, l2_gateway_connection_id)
except exc.L2GatewayServiceDriverError:
with excutils.save_and_reraise_exception():
LOG.error(
"L2GatewayPlugin.delete_l2_gateway_connection_postcommit"
" failed for connection %s", l2_gateway_connection_id)