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# Copyright 2016 Huawei Technologies India Pvt. Ltd.
# 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 abc
from neutron.api import extensions
from neutron.api.v2 import resource
from neutron.api import wsgi
from neutron_lib.api.definitions import bgp as bgp_ext
from neutron_lib.api.definitions import bgp_dragentscheduler as api_def
from neutron_lib.api import extensions as api_extensions
from neutron_lib.api import faults
from neutron_lib import exceptions as n_exc
from neutron_lib.exceptions import agent as agent_exc
from neutron_lib.plugins import directory
from oslo_log import log as logging
import webob
from neutron_dynamic_routing._i18n import _, _LE
LOG = logging.getLogger(__name__)
class DrAgentInvalid(agent_exc.AgentNotFound):
message = _("BgpDrAgent %(id)s is invalid or has been disabled.")
class DrAgentNotHostingBgpSpeaker(n_exc.NotFound):
message = _("BGP speaker %(bgp_speaker_id)s is not hosted "
"by the BgpDrAgent %(agent_id)s.")
class DrAgentAssociationError(n_exc.Conflict):
message = _("BgpDrAgent %(agent_id)s is already associated "
"to a BGP speaker.")
class BgpSpeakerRescheduleError(n_exc.Conflict):
message = _("Failed rescheduling %(bgp_speaker_id)s: "
"%(failure_reason)s.")
class BgpDrSchedulerController(wsgi.Controller):
"""Schedule BgpSpeaker for a BgpDrAgent"""
def get_plugin(self):
plugin = directory.get_plugin(bgp_ext.ALIAS)
if not plugin:
LOG.error(_LE('No plugin for BGP routing registered'))
msg = _('The resource could not be found.')
raise webob.exc.HTTPNotFound(msg)
return plugin
def index(self, request, **kwargs):
plugin = self.get_plugin()
return plugin.list_bgp_speaker_on_dragent(
request.context, kwargs['agent_id'])
def create(self, request, body, **kwargs):
plugin = self.get_plugin()
return plugin.add_bgp_speaker_to_dragent(
request.context,
kwargs['agent_id'],
body['bgp_speaker_id'])
def delete(self, request, id, **kwargs):
plugin = self.get_plugin()
return plugin.remove_bgp_speaker_from_dragent(
request.context, kwargs['agent_id'], id)
class BgpDrAgentController(wsgi.Controller):
def get_plugin(self):
plugin = directory.get_plugin(bgp_ext.ALIAS)
if not plugin:
LOG.error(_LE('No plugin for BGP routing registered'))
msg = _('The resource could not be found.')
raise webob.exc.HTTPNotFound(msg)
return plugin
def index(self, request, **kwargs):
plugin = directory.get_plugin(bgp_ext.ALIAS)
return plugin.list_dragent_hosting_bgp_speaker(
request.context, kwargs['bgp_speaker_id'])
class Bgp_dragentscheduler(api_extensions.APIExtensionDescriptor):
"""Extension class supporting Dynamic Routing scheduler.
"""
api_definition = api_def
@classmethod
def get_resources(cls):
"""Returns Ext Resources."""
exts = []
parent = dict(member_name="agent",
collection_name="agents")
controller = resource.Resource(BgpDrSchedulerController(),
faults.FAULT_MAP)
exts.append(extensions.ResourceExtension(api_def.BGP_DRINSTANCES,
controller, parent))
parent = dict(member_name="bgp_speaker",
collection_name="bgp-speakers")
controller = resource.Resource(BgpDrAgentController(),
faults.FAULT_MAP)
exts.append(extensions.ResourceExtension(api_def.BGP_DRAGENTS,
controller, parent))
return exts
class BgpDrSchedulerPluginBase(metaclass=abc.ABCMeta):
"""REST API to operate BGP dynamic routing agent scheduler.
All the methods must be executed in admin context.
"""
def get_plugin_description(self):
return "Neutron BGP dynamic routing scheduler Plugin"
def get_plugin_type(self):
return bgp_ext.ALIAS
@abc.abstractmethod
def add_bgp_speaker_to_dragent(self, context, agent_id, speaker_id):
pass
@abc.abstractmethod
def remove_bgp_speaker_from_dragent(self, context, agent_id, speaker_id):
pass
@abc.abstractmethod
def list_dragent_hosting_bgp_speaker(self, context, speaker_id):
pass
@abc.abstractmethod
def list_bgp_speaker_on_dragent(self, context, agent_id):
pass
@abc.abstractmethod
def get_bgp_speakers_for_agent_host(self, context, host):
pass
@abc.abstractmethod
def get_bgp_speaker_by_speaker_id(self, context, speaker_id):
pass
@abc.abstractmethod
def get_bgp_peer_by_peer_id(self, context, bgp_peer_id):
pass
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