132 lines
5.8 KiB
Python
132 lines
5.8 KiB
Python
# Copyright (c) 2014 Cisco Systems 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.
|
|
#
|
|
# @author: Arvind Somya (asomya@cisco.com), Cisco Systems Inc.
|
|
|
|
from neutron.db import db_base_plugin_v2
|
|
from neutron.db import extraroute_db
|
|
from neutron.db import l3_gwmode_db
|
|
from neutron.openstack.common import excutils
|
|
from neutron.openstack.common import log as logging
|
|
from neutron.plugins.common import constants
|
|
from neutron.plugins.ml2.drivers.cisco.apic import apic_manager
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class ApicL3ServicePlugin(db_base_plugin_v2.NeutronDbPluginV2,
|
|
extraroute_db.ExtraRoute_db_mixin,
|
|
l3_gwmode_db.L3_NAT_db_mixin):
|
|
"""Implementation of the APIC L3 Router Service Plugin.
|
|
|
|
This class implements a L3 service plugin that provides
|
|
internal gateway functionality for the Cisco APIC (Application
|
|
Policy Infrastructure Controller).
|
|
"""
|
|
supported_extension_aliases = ["router", "ext-gw-mode", "extraroute"]
|
|
|
|
def __init__(self):
|
|
super(ApicL3ServicePlugin, self).__init__()
|
|
self.manager = apic_manager.APICManager()
|
|
|
|
@staticmethod
|
|
def get_plugin_type():
|
|
return constants.L3_ROUTER_NAT
|
|
|
|
@staticmethod
|
|
def get_plugin_description():
|
|
"""Returns string description of the plugin."""
|
|
return _("L3 Router Service Plugin for basic L3 using the APIC")
|
|
|
|
def _add_epg_to_contract(self, tenant_id, epg, contract):
|
|
"""Add an End Point Group(EPG) to a contract as provider/consumer."""
|
|
if self.manager.db.get_provider_contract():
|
|
# Set this network's EPG as a consumer
|
|
self.manager.set_contract_for_epg(tenant_id, epg.epg_id,
|
|
contract.contract_id)
|
|
else:
|
|
# Set this network's EPG as a provider
|
|
self.manager.set_contract_for_epg(tenant_id, epg.epg_id,
|
|
contract.contract_id,
|
|
provider=True)
|
|
|
|
def add_router_interface(self, context, router_id, interface_info):
|
|
"""Attach a subnet to a router."""
|
|
tenant_id = context.tenant_id
|
|
subnet_id = interface_info['subnet_id']
|
|
LOG.debug("Attaching subnet %(subnet_id)s to "
|
|
"router %(router_id)s" % {'subnet_id': subnet_id,
|
|
'router_id': router_id})
|
|
|
|
# Get network for this subnet
|
|
subnet = self.get_subnet(context, subnet_id)
|
|
network_id = subnet['network_id']
|
|
net_name = self.get_network(context, network_id)['name']
|
|
|
|
# Setup tenant filters and contracts
|
|
contract = self.manager.create_tenant_contract(tenant_id)
|
|
|
|
# Check for a provider EPG
|
|
epg = self.manager.ensure_epg_created_for_network(tenant_id,
|
|
network_id,
|
|
net_name)
|
|
self._add_epg_to_contract(tenant_id, epg, contract)
|
|
|
|
# Create DB port
|
|
try:
|
|
return super(ApicL3ServicePlugin, self).add_router_interface(
|
|
context, router_id, interface_info)
|
|
except Exception:
|
|
LOG.error(_("Error attaching subnet %(subnet_id)s to "
|
|
"router %(router_id)s") % {'subnet_id': subnet_id,
|
|
'router_id': router_id})
|
|
with excutils.save_and_reraise_exception():
|
|
self.manager.delete_contract_for_epg(tenant_id, epg.epg_id,
|
|
contract.contract_id,
|
|
provider=epg.provider)
|
|
|
|
def remove_router_interface(self, context, router_id, interface_info):
|
|
"""Detach a subnet from a router."""
|
|
tenant_id = context.tenant_id
|
|
subnet_id = interface_info['subnet_id']
|
|
LOG.debug("Detaching subnet %(subnet_id)s from "
|
|
"router %(router_id)s" % {'subnet_id': subnet_id,
|
|
'router_id': router_id})
|
|
|
|
# Get network for this subnet
|
|
subnet = self.get_subnet(context, subnet_id)
|
|
network_id = subnet['network_id']
|
|
network = self.get_network(context, network_id)
|
|
|
|
contract = self.manager.create_tenant_contract(tenant_id)
|
|
|
|
epg = self.manager.ensure_epg_created_for_network(tenant_id,
|
|
network_id,
|
|
network['name'])
|
|
# Delete contract for this epg
|
|
self.manager.delete_contract_for_epg(tenant_id, epg.epg_id,
|
|
contract.contract_id,
|
|
provider=epg.provider)
|
|
|
|
try:
|
|
return super(ApicL3ServicePlugin, self).remove_router_interface(
|
|
context, router_id, interface_info)
|
|
except Exception:
|
|
LOG.error(_("Error detaching subnet %(subnet_id)s from "
|
|
"router %(router_id)s") % {'subnet_id': subnet_id,
|
|
'router_id': router_id})
|
|
with excutils.save_and_reraise_exception():
|
|
self._add_epg_to_contract(tenant_id, epg, contract)
|