9f1d2e0c51
Blueprint l3-ext-gw-modes This patch introduces an API extension for enabling or disabling source/destination NAT on the router gateway interface, and implements support for this extension in the l3 agent, which has also been refactored in order to ensure SNAT rules are applied (or removed) in a single place in the process_router routine. The patch therefore enables the extension on all plugins which leverage this agent. In this patch the validate_boolean function is re-introduced, as it used for validating a field of the external_gateway_info dict. The resource extension process is also slightly changed so that an API extension can specify which extension should be processed before its attributes can be processed. This is needed to ensure the proper validator for external_gateway_info is installed. Change-Id: Ia80cb56135229366b1706dd3c6d366e40cde1500
69 lines
2.6 KiB
Python
69 lines
2.6 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2013 Nicira Networks, Inc. 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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#
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# @author: Salvatore Orlando, Nicira, Inc
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#
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import sqlalchemy as sa
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from quantum.db import l3_db
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from quantum.extensions import l3
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from quantum.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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EXTERNAL_GW_INFO = l3.EXTERNAL_GW_INFO
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# Modify the Router Data Model adding the enable_snat attribute
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setattr(l3_db.Router, 'enable_snat',
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sa.Column(sa.Boolean, default=True, nullable=False))
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class L3_NAT_db_mixin(l3_db.L3_NAT_db_mixin):
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"""Mixin class to add configurable gateway modes."""
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def _make_router_dict(self, router, fields=None):
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res = super(L3_NAT_db_mixin, self)._make_router_dict(router)
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if router['gw_port_id']:
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nw_id = router.gw_port['network_id']
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res[EXTERNAL_GW_INFO] = {'network_id': nw_id,
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'enable_snat': router.enable_snat}
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return self._fields(res, fields)
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def _update_router_gw_info(self, context, router_id, info):
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router = self._get_router(context, router_id)
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# if enable_snat is not specified use the value
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# stored in the database (default:True)
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enable_snat = not info or info.get('enable_snat', router.enable_snat)
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with context.session.begin(subtransactions=True):
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router.enable_snat = enable_snat
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# Calls superclass, pass router db object for avoiding re-loading
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super(L3_NAT_db_mixin, self)._update_router_gw_info(
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context, router_id, info, router=router)
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def _build_routers_list(self, routers, gw_ports):
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gw_port_id_gw_port_dict = {}
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for gw_port in gw_ports:
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gw_port_id_gw_port_dict[gw_port['id']] = gw_port
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for rtr in routers:
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gw_port_id = rtr['gw_port_id']
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if gw_port_id:
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rtr['gw_port'] = gw_port_id_gw_port_dict[gw_port_id]
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# Add enable_snat key
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rtr['enable_snat'] = rtr[EXTERNAL_GW_INFO]['enable_snat']
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return routers
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