A set of Neutron drivers for the VMware NSX.
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# Copyright 2014 VMware, Inc.
# All Rights Reserved
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from oslo_config import cfg
import stevedore
from oslo_log import log
from vmware_nsx._i18n import _
from vmware_nsx.common import exceptions as nsx_exc
LOG = log.getLogger(__name__)
ROUTER_TYPE_DRIVERS = ["distributed", "exclusive", "shared"]
class RouterTypeManager(stevedore.named.NamedExtensionManager):
"""Manage router segment types using drivers."""
def __init__(self, plugin):
# Mapping from type name to DriverManager
self.drivers = {}
LOG.info("Configured router type driver names: %s",
ROUTER_TYPE_DRIVERS)
super(RouterTypeManager, self).__init__(
'vmware_nsx.neutron.nsxv.router_type_drivers',
ROUTER_TYPE_DRIVERS,
invoke_on_load=True,
invoke_args=(plugin,))
LOG.info("Loaded type driver names: %s", self.names())
self._register_types()
self._check_tenant_router_types(cfg.CONF.nsxv.tenant_router_types)
def _register_types(self):
for ext in self:
router_type = ext.obj.get_type()
if router_type in self.drivers:
LOG.error("Type driver '%(new_driver)s' ignored because "
"type driver '%(old_driver)s' is already "
"registered for type '%(type)s'",
{'new_driver': ext.name,
'old_driver': self.drivers[router_type].name,
'type': router_type})
else:
self.drivers[router_type] = ext
LOG.info("Registered types: %s", self.drivers.keys())
def _check_tenant_router_types(self, types):
self.tenant_router_types = []
for router_type in types:
if router_type in self.drivers:
self.tenant_router_types.append(router_type)
else:
msg = _("No type driver for tenant router_type: %s. "
"Service terminated!") % router_type
LOG.error(msg)
raise SystemExit(msg)
LOG.info("Tenant router_types: %s", self.tenant_router_types)
def get_tenant_router_driver(self, context, router_type):
driver = self.drivers.get(router_type)
if driver:
return driver.obj
raise nsx_exc.NoRouterAvailable()
def decide_tenant_router_type(self, context, router_type=None):
if router_type is None:
for rt in self.tenant_router_types:
driver = self.drivers.get(rt)
if driver:
return rt
raise nsx_exc.NoRouterAvailable()
elif context.is_admin:
driver = self.drivers.get(router_type)
if driver:
return router_type
elif router_type in self.tenant_router_types:
driver = self.drivers.get(router_type)
if driver:
return router_type
raise nsx_exc.NoRouterAvailable()