5bae5828d3
stevedore requires an additional parameter to be used (name_order=True) to sort the loaded extensions to match the order used in the parameter "names". bug 1221490 Change-Id: I614716c45d91cdf152650fba5ec8ced1e9c5aad4
509 lines
22 KiB
Python
509 lines
22 KiB
Python
# Copyright (c) 2013 OpenStack Foundation
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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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import sys
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from oslo.config import cfg
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import stevedore
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from neutron.common import exceptions as exc
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from neutron.extensions import portbindings
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from neutron.openstack.common import log
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from neutron.plugins.ml2.common import exceptions as ml2_exc
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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 TypeManager(stevedore.named.NamedExtensionManager):
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"""Manage network segment types using drivers."""
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def __init__(self):
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# Mapping from type name to DriverManager
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self.drivers = {}
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LOG.info(_("Configured type driver names: %s"),
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cfg.CONF.ml2.type_drivers)
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super(TypeManager, self).__init__('neutron.ml2.type_drivers',
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cfg.CONF.ml2.type_drivers,
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invoke_on_load=True)
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LOG.info(_("Loaded type driver names: %s"), self.names())
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self._register_types()
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self._check_tenant_network_types(cfg.CONF.ml2.tenant_network_types)
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def _register_types(self):
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for ext in self:
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type = ext.obj.get_type()
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if type in self.drivers:
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LOG.error(_("Type driver '%(new_driver)s' ignored because type"
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" driver '%(old_driver)s' is already registered"
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" for type '%(type)s'"),
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{'new_driver': ext.name,
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'old_driver': self.drivers[type].name,
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'type': type})
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else:
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self.drivers[type] = ext
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LOG.info(_("Registered types: %s"), self.drivers.keys())
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def _check_tenant_network_types(self, types):
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self.tenant_network_types = []
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for network_type in types:
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if network_type in self.drivers:
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self.tenant_network_types.append(network_type)
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else:
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LOG.error(_("No type driver for tenant network_type: %s. "
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"Service terminated!"),
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network_type)
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sys.exit(1)
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LOG.info(_("Tenant network_types: %s"), self.tenant_network_types)
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def initialize(self):
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for type, driver in self.drivers.iteritems():
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LOG.info(_("Initializing driver for type '%s'"), type)
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driver.obj.initialize()
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def validate_provider_segment(self, segment):
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network_type = segment[api.NETWORK_TYPE]
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driver = self.drivers.get(network_type)
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if driver:
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driver.obj.validate_provider_segment(segment)
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else:
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msg = _("network_type value '%s' not supported") % network_type
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raise exc.InvalidInput(error_message=msg)
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def reserve_provider_segment(self, session, segment):
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network_type = segment.get(api.NETWORK_TYPE)
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driver = self.drivers.get(network_type)
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driver.obj.reserve_provider_segment(session, segment)
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def allocate_tenant_segment(self, session):
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for network_type in self.tenant_network_types:
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driver = self.drivers.get(network_type)
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segment = driver.obj.allocate_tenant_segment(session)
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if segment:
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return segment
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raise exc.NoNetworkAvailable()
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def release_segment(self, session, segment):
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network_type = segment.get(api.NETWORK_TYPE)
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driver = self.drivers.get(network_type)
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driver.obj.release_segment(session, segment)
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class MechanismManager(stevedore.named.NamedExtensionManager):
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"""Manage networking mechanisms using drivers."""
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def __init__(self):
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# Registered mechanism drivers, keyed by name.
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self.mech_drivers = {}
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# Ordered list of mechanism drivers, defining
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# the order in which the drivers are called.
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self.ordered_mech_drivers = []
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LOG.info(_("Configured mechanism driver names: %s"),
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cfg.CONF.ml2.mechanism_drivers)
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super(MechanismManager, self).__init__('neutron.ml2.mechanism_drivers',
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cfg.CONF.ml2.mechanism_drivers,
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invoke_on_load=True,
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name_order=True)
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LOG.info(_("Loaded mechanism driver names: %s"), self.names())
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self._register_mechanisms()
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def _register_mechanisms(self):
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"""Register all mechanism drivers.
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This method should only be called once in the MechanismManager
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constructor.
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"""
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for ext in self:
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self.mech_drivers[ext.name] = ext
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self.ordered_mech_drivers.append(ext)
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LOG.info(_("Registered mechanism drivers: %s"),
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[driver.name for driver in self.ordered_mech_drivers])
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def initialize(self):
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for driver in self.ordered_mech_drivers:
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LOG.info(_("Initializing mechanism driver '%s'"), driver.name)
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driver.obj.initialize()
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def _call_on_drivers(self, method_name, context,
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continue_on_failure=False):
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"""Helper method for calling a method across all mechanism drivers.
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:param method_name: name of the method to call
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:param context: context parameter to pass to each method call
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:param continue_on_failure: whether or not to continue to call
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all mechanism drivers once one has raised an exception
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver call fails.
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"""
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error = False
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for driver in self.ordered_mech_drivers:
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try:
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getattr(driver.obj, method_name)(context)
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except Exception:
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LOG.exception(
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_("Mechanism driver '%(name)s' failed in %(method)s"),
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{'name': driver.name, 'method': method_name}
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)
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error = True
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if not continue_on_failure:
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break
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if error:
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raise ml2_exc.MechanismDriverError(
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method=method_name
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)
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def create_network_precommit(self, context):
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"""Notify all mechanism drivers during network creation.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver create_network_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("create_network_precommit", context)
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def create_network_postcommit(self, context):
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"""Notify all mechanism drivers after network creation.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver create_network_postcommit call fails.
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Called after the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propagated
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to the caller, where the network will be deleted, triggering
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any required cleanup. There is no guarantee that all mechanism
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drivers are called in this case.
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"""
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self._call_on_drivers("create_network_postcommit", context)
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def update_network_precommit(self, context):
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"""Notify all mechanism drivers during network update.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver update_network_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("update_network_precommit", context)
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def update_network_postcommit(self, context):
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"""Notify all mechanism drivers after network update.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver update_network_postcommit call fails.
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Called after the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propagated
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to the caller, where an error is returned to the user. The
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user is expected to take the appropriate action, whether by
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retrying the call or deleting the network. There is no
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guarantee that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("update_network_postcommit", context)
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def delete_network_precommit(self, context):
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"""Notify all mechanism drivers during network deletion.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver delete_network_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("delete_network_precommit", context)
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def delete_network_postcommit(self, context):
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"""Notify all mechanism drivers after network deletion.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver delete_network_postcommit call fails.
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Called after the database transaction. If any mechanism driver
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raises an error, then the error is logged but we continue to
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call every other mechanism driver. A MechanismDriverError is
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then reraised at the end to notify the caller of a failure. In
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general we expect the caller to ignore the error, as the
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network resource has already been deleted from the database
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and it doesn't make sense to undo the action by recreating the
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network.
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"""
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self._call_on_drivers("delete_network_postcommit", context,
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continue_on_failure=True)
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def create_subnet_precommit(self, context):
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"""Notify all mechanism drivers during subnet creation.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver create_subnet_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("create_subnet_precommit", context)
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def create_subnet_postcommit(self, context):
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"""Notify all mechanism drivers after subnet creation.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver create_subnet_postcommit call fails.
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Called after the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propagated
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to the caller, where the subnet will be deleted, triggering
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any required cleanup. There is no guarantee that all mechanism
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drivers are called in this case.
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"""
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self._call_on_drivers("create_subnet_postcommit", context)
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def update_subnet_precommit(self, context):
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"""Notify all mechanism drivers during subnet update.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver update_subnet_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("update_subnet_precommit", context)
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def update_subnet_postcommit(self, context):
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"""Notify all mechanism drivers after subnet update.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver update_subnet_postcommit call fails.
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Called after the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propagated
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to the caller, where an error is returned to the user. The
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user is expected to take the appropriate action, whether by
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retrying the call or deleting the subnet. There is no
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guarantee that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("update_subnet_postcommit", context)
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def delete_subnet_precommit(self, context):
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"""Notify all mechanism drivers during subnet deletion.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver delete_subnet_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("delete_subnet_precommit", context)
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def delete_subnet_postcommit(self, context):
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"""Notify all mechanism drivers after subnet deletion.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver delete_subnet_postcommit call fails.
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Called after the database transaction. If any mechanism driver
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raises an error, then the error is logged but we continue to
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call every other mechanism driver. A MechanismDriverError is
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then reraised at the end to notify the caller of a failure. In
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general we expect the caller to ignore the error, as the
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subnet resource has already been deleted from the database
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and it doesn't make sense to undo the action by recreating the
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subnet.
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"""
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self._call_on_drivers("delete_subnet_postcommit", context,
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continue_on_failure=True)
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def create_port_precommit(self, context):
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"""Notify all mechanism drivers during port creation.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver create_port_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("create_port_precommit", context)
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def create_port_postcommit(self, context):
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"""Notify all mechanism drivers of port creation.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver create_port_postcommit call fails.
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Called after the database transaction. Errors raised by
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mechanism drivers are left to propogate to the caller, where
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the port will be deleted, triggering any required
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cleanup. There is no guarantee that all mechanism drivers are
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called in this case.
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"""
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self._call_on_drivers("create_port_postcommit", context)
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def update_port_precommit(self, context):
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"""Notify all mechanism drivers during port update.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver update_port_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("update_port_precommit", context)
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def update_port_postcommit(self, context):
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"""Notify all mechanism drivers after port update.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver update_port_postcommit call fails.
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Called after the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propagated
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to the caller, where an error is returned to the user. The
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user is expected to take the appropriate action, whether by
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retrying the call or deleting the port. There is no
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guarantee that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("update_port_postcommit", context)
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def delete_port_precommit(self, context):
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"""Notify all mechanism drivers during port deletion.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver delete_port_precommit call fails.
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Called within the database transaction. If a mechanism driver
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raises an exception, then a MechanismDriverError is propogated
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to the caller, triggering a rollback. There is no guarantee
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that all mechanism drivers are called in this case.
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"""
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self._call_on_drivers("delete_port_precommit", context)
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def delete_port_postcommit(self, context):
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"""Notify all mechanism drivers after port deletion.
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:raises: neutron.plugins.ml2.common.MechanismDriverError
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if any mechanism driver delete_port_postcommit call fails.
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Called after the database transaction. If any mechanism driver
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raises an error, then the error is logged but we continue to
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call every other mechanism driver. A MechanismDriverError is
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then reraised at the end to notify the caller of a failure. In
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general we expect the caller to ignore the error, as the
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port resource has already been deleted from the database
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and it doesn't make sense to undo the action by recreating the
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port.
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"""
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self._call_on_drivers("delete_port_postcommit", context,
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continue_on_failure=True)
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def bind_port(self, context):
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"""Attempt to bind a port using registered mechanism drivers.
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:param context: PortContext instance describing the port
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Called inside transaction context on session, prior to
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create_network_precommit or update_network_precommit, to
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attempt to establish a port binding.
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"""
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binding = context._binding
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LOG.debug(_("Attempting to bind port %(port)s on host %(host)s"),
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{'port': context._port['id'],
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'host': binding.host})
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for driver in self.ordered_mech_drivers:
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try:
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driver.obj.bind_port(context)
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if binding.segment:
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binding.driver = driver.name
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LOG.debug(_("Bound port: %(port)s, host: %(host)s, "
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"driver: %(driver)s, vif_type: %(vif_type)s, "
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"cap_port_filter: %(cap_port_filter)s, "
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"segment: %(segment)s"),
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{'port': context._port['id'],
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'host': binding.host,
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'driver': binding.driver,
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'vif_type': binding.vif_type,
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'cap_port_filter': binding.cap_port_filter,
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'segment': binding.segment})
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return
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except Exception:
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LOG.exception(_("Mechanism driver %s failed in "
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"bind_port"),
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driver.name)
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binding.vif_type = portbindings.VIF_TYPE_BINDING_FAILED
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LOG.warning(_("Failed to bind port %(port)s on host %(host)s"),
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{'port': context._port['id'],
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'host': binding.host})
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def validate_port_binding(self, context):
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"""Check whether existing port binding is still valid.
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:param context: PortContext instance describing the port
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:returns: True if binding is valid, otherwise False
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Called inside transaction context on session to validate that
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the bound MechanismDriver's existing binding for the port is
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still valid.
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"""
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binding = context._binding
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driver = self.mech_drivers.get(binding.driver, None)
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if driver:
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try:
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return driver.obj.validate_port_binding(context)
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except Exception:
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LOG.exception(_("Mechanism driver %s failed in "
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"validate_port_binding"),
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driver.name)
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return False
|
|
|
|
def unbind_port(self, context):
|
|
"""Undo existing port binding.
|
|
|
|
:param context: PortContext instance describing the port
|
|
|
|
Called inside transaction context on session to notify the
|
|
bound MechanismDriver that its existing binding for the port
|
|
is no longer valid.
|
|
"""
|
|
binding = context._binding
|
|
driver = self.mech_drivers.get(binding.driver, None)
|
|
if driver:
|
|
try:
|
|
driver.obj.unbind_port(context)
|
|
except Exception:
|
|
LOG.exception(_("Mechanism driver %s failed in "
|
|
"unbind_port"),
|
|
driver.name)
|
|
binding.vif_type = portbindings.VIF_TYPE_UNBOUND
|
|
binding.cap_port_filter = False
|
|
binding.driver = None
|
|
binding.segment = None
|