134 lines
5.1 KiB
Python
134 lines
5.1 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 quantum.common import exceptions as exc
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from quantum.openstack.common import log
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from quantum.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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# Mapping from type name to DriverManager
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drivers = {}
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def __init__(self):
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# REVISIT(rkukura): Need way to make stevedore use our logging
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# configuration. Currently, nothing is logged if loading a
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# driver fails.
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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__('quantum.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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return 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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Note that this is currently a stub class, but it is expected to be
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functional for the H-2 milestone. It currently serves mainly to
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help solidify the architectural distinction between TypeDrivers
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and MechanismDrivers.
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"""
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def __init__(self):
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# REVISIT(rkukura): Need way to make stevedore use our logging
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# configuration. Currently, nothing is logged if loading a
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# driver fails.
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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__('quantum.ml2.mechanism_drivers',
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cfg.CONF.ml2.mechanism_drivers,
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invoke_on_load=True)
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LOG.info(_("Loaded mechanism driver names: %s"), self.names())
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# TODO(rkukura): Register mechanisms.
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def initialize(self):
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pass
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# TODO(rkukura): Define mechanism dispatch methods
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