# 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 contextlib from eventlet import greenthread from oslo.config import cfg from oslo.db import exception as os_db_exception from sqlalchemy import exc as sql_exc from sqlalchemy.orm import exc as sa_exc from neutron.agent import securitygroups_rpc as sg_rpc from neutron.api.rpc.agentnotifiers import dhcp_rpc_agent_api from neutron.api.v2 import attributes from neutron.common import constants as const from neutron.common import exceptions as exc from neutron.common import rpc as n_rpc from neutron.common import topics 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 db_base_plugin_v2 from neutron.db import external_net_db from neutron.db import extradhcpopt_db from neutron.db import models_v2 from neutron.db import quota_db # noqa from neutron.db import securitygroups_rpc_base as sg_db_rpc from neutron.extensions import allowedaddresspairs as addr_pair from neutron.extensions import extra_dhcp_opt as edo_ext from neutron.extensions import multiprovidernet as mpnet from neutron.extensions import portbindings from neutron.extensions import providernet as provider from neutron import manager from neutron.openstack.common import excutils from neutron.openstack.common import importutils from neutron.openstack.common import jsonutils from neutron.openstack.common import lockutils from neutron.openstack.common import log from neutron.plugins.common import constants as service_constants from neutron.plugins.ml2.common import exceptions as ml2_exc from neutron.plugins.ml2 import config # noqa from neutron.plugins.ml2 import db from neutron.plugins.ml2 import driver_api as api from neutron.plugins.ml2 import driver_context from neutron.plugins.ml2 import managers from neutron.plugins.ml2 import models from neutron.plugins.ml2 import rpc LOG = log.getLogger(__name__) MAX_BIND_TRIES = 10 # REVISIT(rkukura): Move this and other network_type constants to # providernet.py? TYPE_MULTI_SEGMENT = 'multi-segment' class Ml2Plugin(db_base_plugin_v2.NeutronDbPluginV2, external_net_db.External_net_db_mixin, sg_db_rpc.SecurityGroupServerRpcMixin, agentschedulers_db.DhcpAgentSchedulerDbMixin, addr_pair_db.AllowedAddressPairsMixin, extradhcpopt_db.ExtraDhcpOptMixin): """Implement the Neutron L2 abstractions using modules. Ml2Plugin is a Neutron plugin based on separately extensible sets of network types and mechanisms for connecting to networks of those types. The network types and mechanisms are implemented as drivers loaded via Python entry points. Networks can be made up of multiple segments (not yet fully implemented). """ # This attribute specifies whether the plugin supports or not # bulk/pagination/sorting operations. Name mangling is used in # order to ensure it is qualified by class __native_bulk_support = True __native_pagination_support = True __native_sorting_support = True # List of supported extensions _supported_extension_aliases = ["provider", "external-net", "binding", "quotas", "security-group", "agent", "dhcp_agent_scheduler", "multi-provider", "allowed-address-pairs", "extra_dhcp_opt"] @property def supported_extension_aliases(self): if not hasattr(self, '_aliases'): aliases = self._supported_extension_aliases[:] sg_rpc.disable_security_group_extension_by_config(aliases) self._aliases = aliases return self._aliases def __init__(self): # First load drivers, then initialize DB, then initialize drivers self.type_manager = managers.TypeManager() self.mechanism_manager = managers.MechanismManager() super(Ml2Plugin, self).__init__() self.type_manager.initialize() self.mechanism_manager.initialize() # bulk support depends on the underlying drivers self.__native_bulk_support = self.mechanism_manager.native_bulk_support self._setup_rpc() # REVISIT(rkukura): Use stevedore for these? self.network_scheduler = importutils.import_object( cfg.CONF.network_scheduler_driver ) LOG.info(_("Modular L2 Plugin initialization complete")) def _setup_rpc(self): self.notifier = rpc.AgentNotifierApi(topics.AGENT) self.agent_notifiers[const.AGENT_TYPE_DHCP] = ( dhcp_rpc_agent_api.DhcpAgentNotifyAPI() ) def start_rpc_listeners(self): self.endpoints = [rpc.RpcCallbacks(self.notifier, self.type_manager), agents_db.AgentExtRpcCallback()] self.topic = topics.PLUGIN self.conn = n_rpc.create_connection(new=True) self.conn.create_consumer(self.topic, self.endpoints, fanout=False) return self.conn.consume_in_threads() def _process_provider_segment(self, segment): network_type = self._get_attribute(segment, provider.NETWORK_TYPE) physical_network = self._get_attribute(segment, provider.PHYSICAL_NETWORK) segmentation_id = self._get_attribute(segment, provider.SEGMENTATION_ID) if attributes.is_attr_set(network_type): segment = {api.NETWORK_TYPE: network_type, api.PHYSICAL_NETWORK: physical_network, api.SEGMENTATION_ID: segmentation_id} self.type_manager.validate_provider_segment(segment) return segment msg = _("network_type required") raise exc.InvalidInput(error_message=msg) def _process_provider_create(self, network): segments = [] if any(attributes.is_attr_set(network.get(f)) for f in (provider.NETWORK_TYPE, provider.PHYSICAL_NETWORK, provider.SEGMENTATION_ID)): # Verify that multiprovider and provider attributes are not set # at the same time. if attributes.is_attr_set(network.get(mpnet.SEGMENTS)): raise mpnet.SegmentsSetInConjunctionWithProviders() network_type = self._get_attribute(network, provider.NETWORK_TYPE) physical_network = self._get_attribute(network, provider.PHYSICAL_NETWORK) segmentation_id = self._get_attribute(network, provider.SEGMENTATION_ID) segments = [{provider.NETWORK_TYPE: network_type, provider.PHYSICAL_NETWORK: physical_network, provider.SEGMENTATION_ID: segmentation_id}] elif attributes.is_attr_set(network.get(mpnet.SEGMENTS)): segments = network[mpnet.SEGMENTS] else: return return [self._process_provider_segment(s) for s in segments] def _get_attribute(self, attrs, key): value = attrs.get(key) if value is attributes.ATTR_NOT_SPECIFIED: value = None return value def _extend_network_dict_provider(self, context, network): id = network['id'] segments = db.get_network_segments(context.session, id) if not segments: LOG.error(_("Network %s has no segments"), id) network[provider.NETWORK_TYPE] = None network[provider.PHYSICAL_NETWORK] = None network[provider.SEGMENTATION_ID] = None elif len(segments) > 1: network[mpnet.SEGMENTS] = [ {provider.NETWORK_TYPE: segment[api.NETWORK_TYPE], provider.PHYSICAL_NETWORK: segment[api.PHYSICAL_NETWORK], provider.SEGMENTATION_ID: segment[api.SEGMENTATION_ID]} for segment in segments] else: segment = segments[0] network[provider.NETWORK_TYPE] = segment[api.NETWORK_TYPE] network[provider.PHYSICAL_NETWORK] = segment[api.PHYSICAL_NETWORK] network[provider.SEGMENTATION_ID] = segment[api.SEGMENTATION_ID] def _filter_nets_provider(self, context, nets, filters): # TODO(rkukura): Implement filtering. return nets def _process_port_binding(self, mech_context, attrs): binding = mech_context._binding port = mech_context.current changes = False host = attrs and attrs.get(portbindings.HOST_ID) if (attributes.is_attr_set(host) and binding.host != host): binding.host = host changes = True vnic_type = attrs and attrs.get(portbindings.VNIC_TYPE) if (attributes.is_attr_set(vnic_type) and binding.vnic_type != vnic_type): binding.vnic_type = vnic_type changes = True # CLI can't send {}, so treat None as {}. profile = attrs and attrs.get(portbindings.PROFILE) or {} if (profile is not attributes.ATTR_NOT_SPECIFIED and self._get_profile(binding) != profile): binding.profile = jsonutils.dumps(profile) if len(binding.profile) > models.BINDING_PROFILE_LEN: msg = _("binding:profile value too large") raise exc.InvalidInput(error_message=msg) changes = True # Unbind the port if needed. if changes: binding.vif_type = portbindings.VIF_TYPE_UNBOUND binding.vif_details = '' binding.driver = None binding.segment = None self._update_port_dict_binding(port, binding) return changes def _bind_port_if_needed(self, context, allow_notify=False, need_notify=False): plugin_context = context._plugin_context port_id = context._port['id'] # Since the mechanism driver bind_port() calls must be made # outside a DB transaction locking the port state, it is # possible (but unlikely) that the port's state could change # concurrently while these calls are being made. If another # thread or process succeeds in binding the port before this # thread commits its results, the already commited results are # used. If attributes such as binding:host_id, # binding:profile, or binding:vnic_type are updated # concurrently, this loop retries binding using the new # values. count = 0 while True: # First, determine whether it is necessary and possible to # bind the port. binding = context._binding if (binding.vif_type != portbindings.VIF_TYPE_UNBOUND or not binding.host): # We either don't need to bind the port, or can't, so # notify if needed and return. if allow_notify and need_notify: self._notify_port_updated(context) return context # Limit binding attempts to avoid any possibility of # infinite looping and to ensure an error is logged # instead. This does not need to be tunable because no # more than a couple attempts should ever be required in # normal operation. Log at info level if not 1st attempt. count += 1 if count > MAX_BIND_TRIES: LOG.error(_("Failed to commit binding results for %(port)s " "after %(max)s tries"), {'port': port_id, 'max': MAX_BIND_TRIES}) return context if count > 1: greenthread.sleep(0) # yield LOG.info(_("Attempt %(count)s to bind port %(port)s"), {'count': count, 'port': port_id}) # The port isn't already bound and the necessary # information is available, so attempt to bind the port. bind_context = self._bind_port(context) # Now try to commit result of attempting to bind the port. new_context, did_commit = self._commit_port_binding( plugin_context, port_id, binding, bind_context) if not new_context: # The port has been deleted concurrently, so just # return the unbound result from the initial # transaction that completed before the deletion. return context._port # Need to notify if we succeed and our results were # committed. if did_commit and (new_context._binding.vif_type != portbindings.VIF_TYPE_BINDING_FAILED): need_notify = True context = new_context def _bind_port(self, orig_context): # Construct a new PortContext from the one from the previous # transaction. port = orig_context._port orig_binding = orig_context._binding new_binding = models.PortBinding( host=orig_binding.host, vnic_type=orig_binding.vnic_type, profile=orig_binding.profile, vif_type=portbindings.VIF_TYPE_UNBOUND, vif_details='' ) self._update_port_dict_binding(port, new_binding) new_context = driver_context.PortContext( self, orig_context._plugin_context, port, orig_context._network_context._network, new_binding) # Attempt to bind the port and return the context with the # result. self.mechanism_manager.bind_port(new_context) return new_context def _commit_port_binding(self, plugin_context, port_id, orig_binding, new_context): session = plugin_context.session new_binding = new_context._binding # After we've attempted to bind the port, we begin a # transaction, get the current port state, and decide whether # to commit the binding results. # # REVISIT: Serialize this operation with a semaphore to # prevent deadlock waiting to acquire a DB lock held by # another thread in the same process, leading to 'lock wait # timeout' errors. with contextlib.nested(lockutils.lock('db-access'), session.begin(subtransactions=True)): # Get the current port state and build a new PortContext # reflecting this state as original state for subsequent # mechanism driver update_port_*commit() calls. port_db, cur_binding = db.get_locked_port_and_binding(session, port_id) if not port_db: # The port has been deleted concurrently. return oport = self._make_port_dict(port_db) port = self._make_port_dict(port_db) network = self.get_network(plugin_context, port['network_id']) cur_context = driver_context.PortContext( self, plugin_context, port, network, cur_binding, original_port=oport) # Commit our binding results only if port has not been # successfully bound concurrently by another thread or # process and no binding inputs have been changed. commit = ((cur_binding.vif_type in [portbindings.VIF_TYPE_UNBOUND, portbindings.VIF_TYPE_BINDING_FAILED]) and orig_binding.host == cur_binding.host and orig_binding.vnic_type == cur_binding.vnic_type and orig_binding.profile == cur_binding.profile) if commit: # Update the port's binding state with our binding # results. cur_binding.vif_type = new_binding.vif_type cur_binding.vif_details = new_binding.vif_details cur_binding.driver = new_binding.driver cur_binding.segment = new_binding.segment # REVISIT(rkukura): The binding:profile attribute is # supposed to be input-only, but the Mellanox driver # currently modifies it while binding. Remove this # code when the Mellanox driver has been updated to # use binding:vif_details instead. if cur_binding.profile != new_binding.profile: cur_binding.profile = new_binding.profile # Update PortContext's port dictionary to reflect the # updated binding state. self._update_port_dict_binding(port, cur_binding) # Update the port status if requested by the bound driver. if new_binding.segment and new_context._new_port_status: port_db.status = new_context._new_port_status port['status'] = new_context._new_port_status # Call the mechanism driver precommit methods, commit # the results, and call the postcommit methods. self.mechanism_manager.update_port_precommit(cur_context) if commit: self.mechanism_manager.update_port_postcommit(cur_context) # Continue, using the port state as of the transaction that # just finished, whether that transaction committed new # results or discovered concurrent port state changes. return (cur_context, commit) def _update_port_dict_binding(self, port, binding): port[portbindings.HOST_ID] = binding.host port[portbindings.VNIC_TYPE] = binding.vnic_type port[portbindings.PROFILE] = self._get_profile(binding) port[portbindings.VIF_TYPE] = binding.vif_type port[portbindings.VIF_DETAILS] = self._get_vif_details(binding) def _get_vif_details(self, binding): if binding.vif_details: try: return jsonutils.loads(binding.vif_details) except Exception: LOG.error(_("Serialized vif_details DB value '%(value)s' " "for port %(port)s is invalid"), {'value': binding.vif_details, 'port': binding.port_id}) return {} def _get_profile(self, binding): if binding.profile: try: return jsonutils.loads(binding.profile) except Exception: LOG.error(_("Serialized profile DB value '%(value)s' for " "port %(port)s is invalid"), {'value': binding.profile, 'port': binding.port_id}) return {} def _ml2_extend_port_dict_binding(self, port_res, port_db): # None when called during unit tests for other plugins. if port_db.port_binding: self._update_port_dict_binding(port_res, port_db.port_binding) db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs( attributes.PORTS, ['_ml2_extend_port_dict_binding']) # Note - The following hook methods have "ml2" in their names so # that they are not called twice during unit tests due to global # registration of hooks in portbindings_db.py used by other # plugins. def _ml2_port_model_hook(self, context, original_model, query): query = query.outerjoin(models.PortBinding, (original_model.id == models.PortBinding.port_id)) return query def _ml2_port_result_filter_hook(self, query, filters): values = filters and filters.get(portbindings.HOST_ID, []) if not values: return query return query.filter(models.PortBinding.host.in_(values)) db_base_plugin_v2.NeutronDbPluginV2.register_model_query_hook( models_v2.Port, "ml2_port_bindings", '_ml2_port_model_hook', None, '_ml2_port_result_filter_hook') def _notify_port_updated(self, mech_context): port = mech_context._port segment = mech_context.bound_segment if not segment: # REVISIT(rkukura): This should notify agent to unplug port network = mech_context.network.current LOG.warning(_("In _notify_port_updated(), no bound segment for " "port %(port_id)s on network %(network_id)s"), {'port_id': port['id'], 'network_id': network['id']}) return self.notifier.port_update(mech_context._plugin_context, port, segment[api.NETWORK_TYPE], segment[api.SEGMENTATION_ID], segment[api.PHYSICAL_NETWORK]) # TODO(apech): Need to override bulk operations def create_network(self, context, network): net_data = network['network'] segments = self._process_provider_create(net_data) tenant_id = self._get_tenant_id_for_create(context, net_data) session = context.session with session.begin(subtransactions=True): self._ensure_default_security_group(context, tenant_id) result = super(Ml2Plugin, self).create_network(context, network) network_id = result['id'] self._process_l3_create(context, result, net_data) # REVISIT(rkukura): Consider moving all segment management # to TypeManager. if segments: for segment in segments: self.type_manager.reserve_provider_segment(session, segment) db.add_network_segment(session, network_id, segment) else: segment = self.type_manager.allocate_tenant_segment(session) db.add_network_segment(session, network_id, segment) self._extend_network_dict_provider(context, result) mech_context = driver_context.NetworkContext(self, context, result) self.mechanism_manager.create_network_precommit(mech_context) try: self.mechanism_manager.create_network_postcommit(mech_context) except ml2_exc.MechanismDriverError: with excutils.save_and_reraise_exception(): LOG.error(_("mechanism_manager.create_network_postcommit " "failed, deleting network '%s'"), result['id']) self.delete_network(context, result['id']) return result def update_network(self, context, id, network): provider._raise_if_updates_provider_attributes(network['network']) session = context.session with session.begin(subtransactions=True): original_network = super(Ml2Plugin, self).get_network(context, id) updated_network = super(Ml2Plugin, self).update_network(context, id, network) self._process_l3_update(context, updated_network, network['network']) self._extend_network_dict_provider(context, updated_network) mech_context = driver_context.NetworkContext( self, context, updated_network, original_network=original_network) self.mechanism_manager.update_network_precommit(mech_context) # TODO(apech) - handle errors raised by update_network, potentially # by re-calling update_network with the previous attributes. For # now the error is propogated to the caller, which is expected to # either undo/retry the operation or delete the resource. self.mechanism_manager.update_network_postcommit(mech_context) return updated_network def get_network(self, context, id, fields=None): session = context.session with session.begin(subtransactions=True): result = super(Ml2Plugin, self).get_network(context, id, None) self._extend_network_dict_provider(context, result) return self._fields(result, fields) def get_networks(self, context, filters=None, fields=None, sorts=None, limit=None, marker=None, page_reverse=False): session = context.session with session.begin(subtransactions=True): nets = super(Ml2Plugin, self).get_networks(context, filters, None, sorts, limit, marker, page_reverse) for net in nets: self._extend_network_dict_provider(context, net) nets = self._filter_nets_provider(context, nets, filters) nets = self._filter_nets_l3(context, nets, filters) return [self._fields(net, fields) for net in nets] def delete_network(self, context, id): # REVISIT(rkukura) The super(Ml2Plugin, self).delete_network() # function is not used because it auto-deletes ports and # subnets from the DB without invoking the derived class's # delete_port() or delete_subnet(), preventing mechanism # drivers from being called. This approach should be revisited # when the API layer is reworked during icehouse. LOG.debug(_("Deleting network %s"), id) session = context.session while True: try: # REVISIT(rkukura): Its not clear that # with_lockmode('update') is really needed in this # transaction, and if not, the semaphore can also be # removed. # # REVISIT: Serialize this operation with a semaphore # to prevent deadlock waiting to acquire a DB lock # held by another thread in the same process, leading # to 'lock wait timeout' errors. with contextlib.nested(lockutils.lock('db-access'), session.begin(subtransactions=True)): self._process_l3_delete(context, id) # Get ports to auto-delete. ports = (session.query(models_v2.Port). enable_eagerloads(False). filter_by(network_id=id). with_lockmode('update').all()) LOG.debug(_("Ports to auto-delete: %s"), ports) only_auto_del = all(p.device_owner in db_base_plugin_v2. AUTO_DELETE_PORT_OWNERS for p in ports) if not only_auto_del: LOG.debug(_("Tenant-owned ports exist")) raise exc.NetworkInUse(net_id=id) # Get subnets to auto-delete. subnets = (session.query(models_v2.Subnet). enable_eagerloads(False). filter_by(network_id=id). with_lockmode('update').all()) LOG.debug(_("Subnets to auto-delete: %s"), subnets) if not (ports or subnets): network = self.get_network(context, id) mech_context = driver_context.NetworkContext(self, context, network) self.mechanism_manager.delete_network_precommit( mech_context) record = self._get_network(context, id) LOG.debug(_("Deleting network record %s"), record) session.delete(record) for segment in mech_context.network_segments: self.type_manager.release_segment(session, segment) # The segment records are deleted via cascade from the # network record, so explicit removal is not necessary. LOG.debug(_("Committing transaction")) break except os_db_exception.DBError as e: with excutils.save_and_reraise_exception() as ctxt: if isinstance(e.inner_exception, sql_exc.IntegrityError): ctxt.reraise = False msg = _("A concurrent port creation has occurred") LOG.warning(msg) continue for port in ports: try: self.delete_port(context, port.id) except Exception: with excutils.save_and_reraise_exception(): LOG.exception(_("Exception auto-deleting port %s"), port.id) for subnet in subnets: try: self.delete_subnet(context, subnet.id) except Exception: with excutils.save_and_reraise_exception(): LOG.exception(_("Exception auto-deleting subnet %s"), subnet.id) try: self.mechanism_manager.delete_network_postcommit(mech_context) except ml2_exc.MechanismDriverError: # TODO(apech) - One or more mechanism driver failed to # delete the network. Ideally we'd notify the caller of # the fact that an error occurred. LOG.error(_("mechanism_manager.delete_network_postcommit failed")) self.notifier.network_delete(context, id) def create_subnet(self, context, subnet): session = context.session with session.begin(subtransactions=True): result = super(Ml2Plugin, self).create_subnet(context, subnet) mech_context = driver_context.SubnetContext(self, context, result) self.mechanism_manager.create_subnet_precommit(mech_context) try: self.mechanism_manager.create_subnet_postcommit(mech_context) except ml2_exc.MechanismDriverError: with excutils.save_and_reraise_exception(): LOG.error(_("mechanism_manager.create_subnet_postcommit " "failed, deleting subnet '%s'"), result['id']) self.delete_subnet(context, result['id']) return result def update_subnet(self, context, id, subnet): session = context.session with session.begin(subtransactions=True): original_subnet = super(Ml2Plugin, self).get_subnet(context, id) updated_subnet = super(Ml2Plugin, self).update_subnet( context, id, subnet) mech_context = driver_context.SubnetContext( self, context, updated_subnet, original_subnet=original_subnet) self.mechanism_manager.update_subnet_precommit(mech_context) # TODO(apech) - handle errors raised by update_subnet, potentially # by re-calling update_subnet with the previous attributes. For # now the error is propogated to the caller, which is expected to # either undo/retry the operation or delete the resource. self.mechanism_manager.update_subnet_postcommit(mech_context) return updated_subnet def delete_subnet(self, context, id): # REVISIT(rkukura) The super(Ml2Plugin, self).delete_subnet() # function is not used because it deallocates the subnet's addresses # from ports in the DB without invoking the derived class's # update_port(), preventing mechanism drivers from being called. # This approach should be revisited when the API layer is reworked # during icehouse. LOG.debug(_("Deleting subnet %s"), id) session = context.session while True: # REVISIT: Serialize this operation with a semaphore to # prevent deadlock waiting to acquire a DB lock held by # another thread in the same process, leading to 'lock # wait timeout' errors. with contextlib.nested(lockutils.lock('db-access'), session.begin(subtransactions=True)): subnet = self.get_subnet(context, id) # Get ports to auto-deallocate allocated = (session.query(models_v2.IPAllocation). filter_by(subnet_id=id). join(models_v2.Port). filter_by(network_id=subnet['network_id']). with_lockmode('update').all()) LOG.debug(_("Ports to auto-deallocate: %s"), allocated) only_auto_del = all(not a.port_id or a.ports.device_owner in db_base_plugin_v2. AUTO_DELETE_PORT_OWNERS for a in allocated) if not only_auto_del: LOG.debug(_("Tenant-owned ports exist")) raise exc.SubnetInUse(subnet_id=id) if not allocated: mech_context = driver_context.SubnetContext(self, context, subnet) self.mechanism_manager.delete_subnet_precommit( mech_context) LOG.debug(_("Deleting subnet record")) record = self._get_subnet(context, id) session.delete(record) LOG.debug(_("Committing transaction")) break for a in allocated: if a.port_id: # calling update_port() for each allocation to remove the # IP from the port and call the MechanismDrivers data = {'port': {'fixed_ips': [{'subnet_id': ip.subnet_id, 'ip_address': ip.ip_address} for ip in a.ports.fixed_ips if ip.subnet_id != id]}} try: self.update_port(context, a.port_id, data) except Exception: with excutils.save_and_reraise_exception(): LOG.exception(_("Exception deleting fixed_ip from " "port %s"), a.port_id) session.delete(a) try: self.mechanism_manager.delete_subnet_postcommit(mech_context) except ml2_exc.MechanismDriverError: # TODO(apech) - One or more mechanism driver failed to # delete the subnet. Ideally we'd notify the caller of # the fact that an error occurred. LOG.error(_("mechanism_manager.delete_subnet_postcommit failed")) def create_port(self, context, port): attrs = port['port'] attrs['status'] = const.PORT_STATUS_DOWN session = context.session with session.begin(subtransactions=True): self._ensure_default_security_group_on_port(context, port) sgids = self._get_security_groups_on_port(context, port) dhcp_opts = port['port'].get(edo_ext.EXTRADHCPOPTS, []) result = super(Ml2Plugin, self).create_port(context, port) self._process_port_create_security_group(context, result, sgids) network = self.get_network(context, result['network_id']) binding = db.add_port_binding(session, result['id']) mech_context = driver_context.PortContext(self, context, result, network, binding) self._process_port_binding(mech_context, attrs) result[addr_pair.ADDRESS_PAIRS] = ( self._process_create_allowed_address_pairs( context, result, attrs.get(addr_pair.ADDRESS_PAIRS))) self._process_port_create_extra_dhcp_opts(context, result, dhcp_opts) self.mechanism_manager.create_port_precommit(mech_context) try: self.mechanism_manager.create_port_postcommit(mech_context) except ml2_exc.MechanismDriverError: with excutils.save_and_reraise_exception(): LOG.error(_("mechanism_manager.create_port_postcommit " "failed, deleting port '%s'"), result['id']) self.delete_port(context, result['id']) # REVISIT(rkukura): Is there any point in calling this before # a binding has been succesfully established? self.notify_security_groups_member_updated(context, result) try: bound_context = self._bind_port_if_needed(mech_context) except ml2_exc.MechanismDriverError: with excutils.save_and_reraise_exception(): LOG.error(_("_bind_port_if_needed " "failed, deleting port '%s'"), result['id']) self.delete_port(context, result['id']) return bound_context._port def update_port(self, context, id, port): attrs = port['port'] need_port_update_notify = False session = context.session # REVISIT: Serialize this operation with a semaphore to # prevent deadlock waiting to acquire a DB lock held by # another thread in the same process, leading to 'lock wait # timeout' errors. with contextlib.nested(lockutils.lock('db-access'), session.begin(subtransactions=True)): port_db, binding = db.get_locked_port_and_binding(session, id) if not port_db: raise exc.PortNotFound(port_id=id) original_port = self._make_port_dict(port_db) updated_port = super(Ml2Plugin, self).update_port(context, id, port) if addr_pair.ADDRESS_PAIRS in port['port']: need_port_update_notify |= ( self.update_address_pairs_on_port(context, id, port, original_port, updated_port)) need_port_update_notify |= self.update_security_group_on_port( context, id, port, original_port, updated_port) network = self.get_network(context, original_port['network_id']) need_port_update_notify |= self._update_extra_dhcp_opts_on_port( context, id, port, updated_port) mech_context = driver_context.PortContext( self, context, updated_port, network, binding, original_port=original_port) need_port_update_notify |= self._process_port_binding( mech_context, attrs) self.mechanism_manager.update_port_precommit(mech_context) # TODO(apech) - handle errors raised by update_port, potentially # by re-calling update_port with the previous attributes. For # now the error is propogated to the caller, which is expected to # either undo/retry the operation or delete the resource. self.mechanism_manager.update_port_postcommit(mech_context) need_port_update_notify |= self.is_security_group_member_updated( context, original_port, updated_port) if original_port['admin_state_up'] != updated_port['admin_state_up']: need_port_update_notify = True bound_port = self._bind_port_if_needed( mech_context, allow_notify=True, need_notify=need_port_update_notify) return bound_port._port def delete_port(self, context, id, l3_port_check=True): LOG.debug(_("Deleting port %s"), id) l3plugin = manager.NeutronManager.get_service_plugins().get( service_constants.L3_ROUTER_NAT) if l3plugin and l3_port_check: l3plugin.prevent_l3_port_deletion(context, id) session = context.session # REVISIT: Serialize this operation with a semaphore to # prevent deadlock waiting to acquire a DB lock held by # another thread in the same process, leading to 'lock wait # timeout' errors. with contextlib.nested(lockutils.lock('db-access'), session.begin(subtransactions=True)): port_db, binding = db.get_locked_port_and_binding(session, id) if not port_db: # the port existed when l3plugin.prevent_l3_port_deletion # was called but now is already gone LOG.debug(_("The port '%s' was deleted"), id) return port = self._make_port_dict(port_db) network = self.get_network(context, port['network_id']) mech_context = driver_context.PortContext(self, context, port, network, binding) self.mechanism_manager.delete_port_precommit(mech_context) self._delete_port_security_group_bindings(context, id) LOG.debug(_("Calling base delete_port")) if l3plugin: router_ids = l3plugin.disassociate_floatingips( context, id, do_notify=False) super(Ml2Plugin, self).delete_port(context, id) # now that we've left db transaction, we are safe to notify if l3plugin: l3plugin.notify_routers_updated(context, router_ids) try: self.mechanism_manager.delete_port_postcommit(mech_context) except ml2_exc.MechanismDriverError: # TODO(apech) - One or more mechanism driver failed to # delete the port. Ideally we'd notify the caller of the # fact that an error occurred. LOG.error(_("mechanism_manager.delete_port_postcommit failed")) self.notify_security_groups_member_updated(context, port) def get_bound_port_context(self, plugin_context, port_id): session = plugin_context.session with session.begin(subtransactions=True): try: port_db = (session.query(models_v2.Port). enable_eagerloads(False). filter(models_v2.Port.id.startswith(port_id)). one()) except sa_exc.NoResultFound: return except exc.MultipleResultsFound: LOG.error(_("Multiple ports have port_id starting with %s"), port_id) return port = self._make_port_dict(port_db) network = self.get_network(plugin_context, port['network_id']) port_context = driver_context.PortContext( self, plugin_context, port, network, port_db.port_binding) return self._bind_port_if_needed(port_context) def update_port_status(self, context, port_id, status, host=None): updated = False session = context.session # REVISIT: Serialize this operation with a semaphore to # prevent deadlock waiting to acquire a DB lock held by # another thread in the same process, leading to 'lock wait # timeout' errors. with contextlib.nested(lockutils.lock('db-access'), session.begin(subtransactions=True)): port = db.get_port(session, port_id) if not port: LOG.warning(_("Port %(port)s updated up by agent not found"), {'port': port_id}) return False if port.status != status: original_port = self._make_port_dict(port) port.status = status updated_port = self._make_port_dict(port) network = self.get_network(context, original_port['network_id']) mech_context = driver_context.PortContext( self, context, updated_port, network, port.port_binding, original_port=original_port) self.mechanism_manager.update_port_precommit(mech_context) updated = True if updated: self.mechanism_manager.update_port_postcommit(mech_context) return True def port_bound_to_host(self, context, port_id, host): port_host = db.get_port_binding_host(port_id) return (port_host == host)