bc2076304a
The ML2 plugin now calls the bind_port() operation on the registered mechanism drivers outside of any enclosing DB transaction. Ports are created or updated in one transaction, then a binding is established if possible, and finally a second transaction commits the binding result. With [re]binding moved outside the DB transaction that triggered it, it is now possible that multiple threads or processes will concurrently try to bind the same port, or that the port will be updated between transactions. Concurrent attempts to bind the same port are allowed to proceed, which results are used is resolved in the second transaction, and binding is retried if necessary. Improvements to the Cisco Nexus driver and unit tests from Rich Curran needed due to the binding changes are also included. Closes-Bug: 1276391 Closes-Bug: 1335226 Change-Id: I65dafc330d6e812dad0667d2383858504d0ba299
129 lines
5.3 KiB
Python
129 lines
5.3 KiB
Python
# Copyright 2014 Big Switch Networks, Inc.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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#
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# @author: Sumit Naiksatam, sumitnaiksatam@gmail.com, Big Switch Networks, Inc.
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# @author: Kevin Benton, Big Switch Networks, Inc.
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import copy
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import httplib
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import eventlet
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from oslo.config import cfg
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from neutron import context as ctx
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from neutron.extensions import portbindings
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from neutron.openstack.common import excutils
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from neutron.openstack.common import log
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from neutron.plugins.bigswitch import config as pl_config
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from neutron.plugins.bigswitch import plugin
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from neutron.plugins.bigswitch import servermanager
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from neutron.plugins.ml2 import driver_api as api
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LOG = log.getLogger(__name__)
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class BigSwitchMechanismDriver(plugin.NeutronRestProxyV2Base,
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api.MechanismDriver):
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"""Mechanism Driver for Big Switch Networks Controller.
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This driver relays the network create, update, delete
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operations to the Big Switch Controller.
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"""
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def initialize(self):
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LOG.debug(_('Initializing driver'))
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# register plugin config opts
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pl_config.register_config()
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self.evpool = eventlet.GreenPool(cfg.CONF.RESTPROXY.thread_pool_size)
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# backend doesn't support bulk operations yet
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self.native_bulk_support = False
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# init network ctrl connections
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self.servers = servermanager.ServerPool()
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self.servers.get_topo_function = self._get_all_data
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self.servers.get_topo_function_args = {'get_ports': True,
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'get_floating_ips': False,
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'get_routers': False}
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self.segmentation_types = ', '.join(cfg.CONF.ml2.type_drivers)
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LOG.debug(_("Initialization done"))
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def create_network_postcommit(self, context):
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# create network on the network controller
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self._send_create_network(context.current)
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def update_network_postcommit(self, context):
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# update network on the network controller
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self._send_update_network(context.current)
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def delete_network_postcommit(self, context):
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# delete network on the network controller
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self._send_delete_network(context.current)
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def create_port_postcommit(self, context):
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# create port on the network controller
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port = self._prepare_port_for_controller(context)
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if port:
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self.async_port_create(port["network"]["tenant_id"],
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port["network"]["id"], port)
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def update_port_postcommit(self, context):
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# update port on the network controller
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port = self._prepare_port_for_controller(context)
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if port:
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try:
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self.async_port_create(port["network"]["tenant_id"],
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port["network"]["id"], port)
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except servermanager.RemoteRestError as e:
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with excutils.save_and_reraise_exception() as ctxt:
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if (cfg.CONF.RESTPROXY.auto_sync_on_failure and
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e.status == httplib.NOT_FOUND and
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servermanager.NXNETWORK in e.reason):
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ctxt.reraise = False
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LOG.error(_("Iconsistency with backend controller "
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"triggering full synchronization."))
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topoargs = self.servers.get_topo_function_args
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self._send_all_data(
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send_ports=topoargs['get_ports'],
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send_floating_ips=topoargs['get_floating_ips'],
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send_routers=topoargs['get_routers'],
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triggered_by_tenant=port["network"]["tenant_id"]
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)
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def delete_port_postcommit(self, context):
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# delete port on the network controller
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port = context.current
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net = context.network.current
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self.servers.rest_delete_port(net["tenant_id"], net["id"], port['id'])
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def _prepare_port_for_controller(self, context):
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# make a copy so the context isn't changed for other drivers
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port = copy.deepcopy(context.current)
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net = context.network.current
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port['network'] = net
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port['bound_segment'] = context.bound_segment
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actx = ctx.get_admin_context()
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prepped_port = self._extend_port_dict_binding(actx, port)
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prepped_port = self._map_state_and_status(prepped_port)
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if (portbindings.HOST_ID not in prepped_port or
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prepped_port[portbindings.HOST_ID] == ''):
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LOG.warning(_("Ignoring port notification to controller because "
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"of missing host ID."))
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# in ML2, controller doesn't care about ports without
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# the host_id set
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return False
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return prepped_port
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