547 lines
24 KiB
Python
547 lines
24 KiB
Python
"""
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# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2012 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: Dan Wendlandt, Nicira, Inc
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#
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"""
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import logging
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import sqlalchemy as sa
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from sqlalchemy import orm
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from sqlalchemy.orm import exc
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import webob.exc as w_exc
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from quantum.api.v2 import attributes
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from quantum.common import exceptions as q_exc
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from quantum.common import utils
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from quantum.db import model_base
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from quantum.db import models_v2
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from quantum.extensions import l3
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from quantum.openstack.common import cfg
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LOG = logging.getLogger(__name__)
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l3_opts = [
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cfg.StrOpt('metadata_ip_address', default='127.0.0.1'),
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cfg.IntOpt('metadata_port', default=8775)
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]
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# Register the configuration options
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cfg.CONF.register_opts(l3_opts)
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DEVICE_OWNER_ROUTER_INTF = "network:router_interface"
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DEVICE_OWNER_ROUTER_GW = "network:router_gateway"
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DEVICE_OWNER_FLOATINGIP = "network:floatingip"
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class Router(model_base.BASEV2, models_v2.HasId, models_v2.HasTenant):
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"""Represents a v2 quantum router."""
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name = sa.Column(sa.String(255))
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status = sa.Column(sa.String(16))
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admin_state_up = sa.Column(sa.Boolean)
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gw_port_id = sa.Column(sa.String(36), sa.ForeignKey('ports.id',
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ondelete="CASCADE"))
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gw_port = orm.relationship(models_v2.Port)
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class FloatingIP(model_base.BASEV2, models_v2.HasId, models_v2.HasTenant):
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"""Represents a floating IP, which may or many not be
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allocated to a tenant, and may or may not be associated with
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an internal port/ip address/router.
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"""
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floating_ip_address = sa.Column(sa.String(64), nullable=False)
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floating_network_id = sa.Column(sa.String(36), nullable=False)
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floating_port_id = sa.Column(sa.String(36), sa.ForeignKey('ports.id'),
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nullable=False)
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fixed_port_id = sa.Column(sa.String(36), sa.ForeignKey('ports.id'))
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fixed_ip_address = sa.Column(sa.String(64))
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router_id = sa.Column(sa.String(36), sa.ForeignKey('routers.id'))
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class L3_NAT_db_mixin(l3.RouterPluginBase):
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"""Mixin class to add L3/NAT router methods to db_plugin_base_v2"""
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def _get_router(self, context, id, verbose=None):
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try:
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router = self._get_by_id(context, Router, id, verbose=verbose)
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except exc.NoResultFound:
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raise l3.RouterNotFound(router_id=id)
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except exc.MultipleResultsFound:
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LOG.error('Multiple routers match for %s' % id)
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raise l3.RouterNotFound(router_id=id)
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return router
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def _make_router_dict(self, router, fields=None):
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res = {'id': router['id'],
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'name': router['name'],
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'tenant_id': router['tenant_id'],
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'admin_state_up': router['admin_state_up'],
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'status': router['status'],
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'external_gateway_info': None}
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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_gateway_info'] = {'network_id': nw_id}
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return self._fields(res, fields)
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def create_router(self, context, router):
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r = router['router']
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has_gw_info = False
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if 'external_gateway_info' in r:
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has_gw_info = True
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gw_info = r['external_gateway_info']
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del r['external_gateway_info']
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tenant_id = self._get_tenant_id_for_create(context, r)
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with context.session.begin(subtransactions=True):
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# pre-generate id so it will be available when
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# configuring external gw port
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router_db = Router(id=utils.str_uuid(),
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tenant_id=tenant_id,
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name=r['name'],
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admin_state_up=r['admin_state_up'],
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status="ACTIVE")
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context.session.add(router_db)
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if has_gw_info:
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self._update_router_gw_info(context, router_db['id'], gw_info)
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return self._make_router_dict(router_db)
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def update_router(self, context, id, router):
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r = router['router']
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has_gw_info = False
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if 'external_gateway_info' in r:
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has_gw_info = True
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gw_info = r['external_gateway_info']
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del r['external_gateway_info']
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with context.session.begin(subtransactions=True):
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if has_gw_info:
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self._update_router_gw_info(context, id, gw_info)
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router_db = self._get_router(context, id)
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# Ensure we actually have something to update
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if r.keys():
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router_db.update(r)
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return self._make_router_dict(router_db)
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def _update_router_gw_info(self, context, router_id, info):
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# TODO(salvatore-orlando): guarantee atomic behavior also across
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# operations that span beyond the model classes handled by this
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# class (e.g.: delete_port)
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router = self._get_router(context, router_id)
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gw_port = router.gw_port
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network_id = info.get('network_id', None) if info else None
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if network_id:
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#FIXME(danwent): confirm net-id is valid external network
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self._get_network(context, network_id)
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# figure out if we need to delete existing port
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if gw_port and gw_port['network_id'] != network_id:
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with context.session.begin(subtransactions=True):
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router.update({'gw_port_id': None})
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context.session.add(router)
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self.delete_port(context, gw_port['id'])
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if network_id is not None and (gw_port is None or
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gw_port['network_id'] != network_id):
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# Port has no 'tenant-id', as it is hidden from user
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gw_port = self.create_port(context, {
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'port':
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{'network_id': network_id,
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'mac_address': attributes.ATTR_NOT_SPECIFIED,
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'fixed_ips': attributes.ATTR_NOT_SPECIFIED,
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'device_id': router_id,
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'device_owner': DEVICE_OWNER_ROUTER_GW,
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'admin_state_up': True,
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'name': ''}})
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if not len(gw_port['fixed_ips']):
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self.delete_port(context, gw_port['id'])
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msg = ('No IPs available for external network %s' %
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network_id)
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raise q_exc.BadRequest(resource='router', msg=msg)
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with context.session.begin(subtransactions=True):
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router.update({'gw_port_id': gw_port['id']})
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context.session.add(router)
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def delete_router(self, context, id):
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with context.session.begin(subtransactions=True):
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router = self._get_router(context, id)
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device_filter = {'device_id': [id],
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'device_owner': [DEVICE_OWNER_ROUTER_INTF]}
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ports = self.get_ports(context, filters=device_filter)
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if ports:
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raise l3.RouterInUse(router_id=id)
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# NOTE(salvatore-orlando): gw port will be automatically deleted
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# thanks to cascading on the ORM relationship
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context.session.delete(router)
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def get_router(self, context, id, fields=None, verbose=None):
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router = self._get_router(context, id, verbose=verbose)
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return self._make_router_dict(router, fields)
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def get_routers(self, context, filters=None, fields=None, verbose=None):
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return self._get_collection(context, Router,
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self._make_router_dict,
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filters=filters, fields=fields,
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verbose=verbose)
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def _check_for_dup_router_subnet(self, context, router_id,
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network_id, subnet_id):
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try:
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rport_qry = context.session.query(models_v2.Port)
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rports = rport_qry.filter_by(
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device_id=router_id,
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device_owner=DEVICE_OWNER_ROUTER_INTF,
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network_id=network_id).all()
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# its possible these ports on on the same network, but
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# different subnet
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for p in rports:
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for ip in p['fixed_ips']:
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if ip['subnet_id'] == subnet_id:
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msg = ("Router already has a port on subnet %s"
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% subnet_id)
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raise q_exc.BadRequest(resource='router', msg=msg)
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except exc.NoResultFound:
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pass
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def add_router_interface(self, context, router_id, interface_info):
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# make sure router exists - will raise if not
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self._get_router(context, router_id)
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if not interface_info:
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msg = "Either subnet_id or port_id must be specified"
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raise q_exc.BadRequest(resource='router', msg=msg)
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if 'port_id' in interface_info:
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if 'subnet_id' in interface_info:
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msg = "cannot specify both subnet-id and port-id"
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raise q_exc.BadRequest(resource='router', msg=msg)
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port = self._get_port(context, interface_info['port_id'])
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if port['device_id']:
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raise q_exc.PortInUse(net_id=port['network_id'],
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port_id=port['id'],
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device_id=port['device_id'])
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fixed_ips = [ip for ip in port['fixed_ips']]
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if len(fixed_ips) != 1:
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msg = 'Router port must have exactly one fixed IP'
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raise q_exc.BadRequest(resource='router', msg=msg)
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self._check_for_dup_router_subnet(context, router_id,
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port['network_id'],
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fixed_ips[0]['subnet_id'])
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port.update({'device_id': router_id,
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'device_owner': DEVICE_OWNER_ROUTER_INTF})
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elif 'subnet_id' in interface_info:
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subnet_id = interface_info['subnet_id']
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subnet = self._get_subnet(context, subnet_id)
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# Ensure the subnet has a gateway
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if not subnet['gateway_ip']:
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msg = 'Subnet for router interface must have a gateway IP'
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raise q_exc.BadRequest(resource='router', msg=msg)
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self._check_for_dup_router_subnet(context, router_id,
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subnet['network_id'], subnet_id)
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fixed_ip = {'ip_address': subnet['gateway_ip'],
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'subnet_id': subnet['id']}
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port = self.create_port(context, {
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'port':
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{'network_id': subnet['network_id'],
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'fixed_ips': [fixed_ip],
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'mac_address': attributes.ATTR_NOT_SPECIFIED,
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'admin_state_up': True,
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'device_id': router_id,
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'device_owner': DEVICE_OWNER_ROUTER_INTF,
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'name': ''}})
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return {'port_id': port['id'],
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'subnet_id': port['fixed_ips'][0]['subnet_id']}
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def remove_router_interface(self, context, router_id, interface_info):
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# make sure router exists
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router = self._get_router(context, router_id)
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if not interface_info:
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msg = "Either subnet_id or port_id must be specified"
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raise q_exc.BadRequest(resource='router', msg=msg)
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if 'port_id' in interface_info:
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port_db = self._get_port(context, interface_info['port_id'])
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if 'subnet_id' in interface_info:
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port_subnet_id = port_db['fixed_ips'][0]['subnet_id']
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if port_subnet_id != interface_info['subnet_id']:
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raise w_exc.HTTPConflict("subnet_id %s on port does not "
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"match requested one (%s)"
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% (port_subnet_id,
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interface_info['subnet_id']))
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if port_db['device_id'] != router_id:
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raise w_exc.HTTPConflict("port_id %s not used by router" %
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port_db['id'])
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self.delete_port(context, port_db['id'])
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elif 'subnet_id' in interface_info:
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subnet_id = interface_info['subnet_id']
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subnet = self._get_subnet(context, subnet_id)
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found = False
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try:
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rport_qry = context.session.query(models_v2.Port)
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ports = rport_qry.filter_by(
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device_id=router_id,
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device_owner=DEVICE_OWNER_ROUTER_INTF,
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network_id=subnet['network_id']).all()
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for p in ports:
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if p['fixed_ips'][0]['subnet_id'] == subnet_id:
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self.delete_port(context, p['id'])
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found = True
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break
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except exc.NoResultFound:
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pass
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if not found:
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raise w_exc.HTTPNotFound("Router %(router_id)s has no "
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"interface on subnet %(subnet_id)s"
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% locals())
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def _get_floatingip(self, context, id, verbose=None):
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try:
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floatingip = self._get_by_id(context, FloatingIP, id,
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verbose=verbose)
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except exc.NoResultFound:
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raise l3.FloatingIPNotFound(floatingip_id=id)
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except exc.MultipleResultsFound:
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LOG.error('Multiple floating ips match for %s' % id)
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raise l3.FloatingIPNotFound(floatingip_id=id)
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return floatingip
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def _make_floatingip_dict(self, floatingip, fields=None):
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res = {'id': floatingip['id'],
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'tenant_id': floatingip['tenant_id'],
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'floating_ip_address': floatingip['floating_ip_address'],
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'floating_network_id': floatingip['floating_network_id'],
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'router_id': floatingip['router_id'],
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'port_id': floatingip['fixed_port_id'],
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'fixed_ip_address': floatingip['fixed_ip_address']}
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return self._fields(res, fields)
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def _get_router_for_internal_subnet(self, context, internal_port,
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internal_subnet_id):
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subnet_db = self._get_subnet(context, internal_subnet_id)
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if not subnet_db['gateway_ip']:
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msg = ('Cannot add floating IP to port on subnet %s '
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'which has no gateway_ip' % internal_subnet_id)
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raise q_exc.BadRequest(resource='floatingip', msg=msg)
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#FIXME(danwent): can do join, but cannot use standard F-K syntax?
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# just do it inefficiently for now
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port_qry = context.session.query(models_v2.Port)
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ports = port_qry.filter_by(network_id=internal_port['network_id'])
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for p in ports:
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ips = [ip['ip_address'] for ip in p['fixed_ips']]
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if len(ips) != 1:
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continue
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fixed = p['fixed_ips'][0]
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if (fixed['ip_address'] == subnet_db['gateway_ip'] and
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fixed['subnet_id'] == internal_subnet_id):
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router_qry = context.session.query(Router)
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try:
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router = router_qry.filter_by(id=p['device_id']).one()
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#TODO(danwent): confirm that this router has a floating
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# ip enabled gateway with support for this floating IP
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# network
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return router['id']
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except exc.NoResultFound:
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pass
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raise l3.ExternalGatewayForFloatingIPNotFound(
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subnet_id=internal_subnet_id,
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port_id=internal_port['id'])
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def get_assoc_data(self, context, fip):
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"""When a floating IP is associated with an internal port,
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we need to extract/determine some data associated with the
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internal port, including the internal_ip_address, and router_id.
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We also need to confirm that this internal port is owned by the
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tenant who owns the floating IP.
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"""
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internal_port = self._get_port(context, fip['port_id'])
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if not internal_port['tenant_id'] == fip['tenant_id']:
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msg = ('Port %s is associated with a different tenant'
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'and therefore cannot be found to floating IP %s'
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% (fip['port_id'], fip['id']))
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raise q_exc.BadRequest(resource='floating', msg=msg)
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internal_subnet_id = None
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if 'fixed_ip_address' in fip and fip['fixed_ip_address']:
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internal_ip_address = fip['fixed_ip_address']
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for ip in internal_port['fixed_ips']:
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if ip['ip_address'] == internal_ip_address:
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internal_subnet_id = ip['subnet_id']
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if not internal_subnet_id:
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msg = ('Port %s does not have fixed ip %s' %
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(internal_port['id'], internal_ip_address))
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raise q_exc.BadRequest(resource='floatingip', msg=msg)
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else:
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ips = [ip['ip_address'] for ip in internal_port['fixed_ips']]
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if len(ips) == 0:
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msg = ('Cannot add floating IP to port %s that has'
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'no fixed IP addresses' % internal_port['id'])
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raise q_exc.BadRequest(resource='floatingip', msg=msg)
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if len(ips) > 1:
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msg = ('Port %s has multiple fixed IPs. Must provide'
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' a specific IP when assigning a floating IP' %
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internal_port['id'])
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raise q_exc.BadRequest(resource='floatingip', msg=msg)
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internal_ip_address = internal_port['fixed_ips'][0]['ip_address']
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internal_subnet_id = internal_port['fixed_ips'][0]['subnet_id']
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router_id = self._get_router_for_internal_subnet(context,
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internal_port,
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internal_subnet_id)
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return (fip['port_id'], internal_ip_address, router_id)
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def _update_fip_assoc(self, context, fip, floatingip_db, external_port):
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port_id = internal_ip_address = router_id = None
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if 'port_id' in fip and fip['port_id']:
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port_qry = context.session.query(FloatingIP)
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try:
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port_qry.filter_by(fixed_port_id=fip['port_id']).one()
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raise l3.FloatingIPPortAlreadyAssociated(
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port_id=fip['port_id'])
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except exc.NoResultFound:
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pass
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port_id, internal_ip_address, router_id = self.get_assoc_data(
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context,
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fip)
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# Assign external address for floating IP
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# fetch external gateway port
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ports = self.get_ports(context, filters={'device_id': [router_id]})
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if not ports:
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msg = ("The router %s needed for association a floating ip "
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"to port %s does not have an external gateway"
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% (router_id, port_id))
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raise q_exc.BadRequest(resource='floatingip', msg=msg)
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# retrieve external subnet identifier
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# NOTE: by design we cannot have more than 1 IP on ext gw port
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ext_subnet_id = ports[0]['fixed_ips'][0]['subnet_id']
|
|
# ensure floating ip address is taken from this subnet
|
|
for fixed_ip in external_port['fixed_ips']:
|
|
if fixed_ip['subnet_id'] == ext_subnet_id:
|
|
floatingip_db.update(
|
|
{'floating_ip_address': fixed_ip['ip_address'],
|
|
'floating_port_id': external_port['id']})
|
|
else:
|
|
# fallback choice (first IP address on external port)
|
|
floatingip_db.update(
|
|
{'floating_ip_address':
|
|
external_port['fixed_ips'][0]['ip_address'],
|
|
'floating_port_id':
|
|
external_port['id']})
|
|
|
|
floatingip_db.update({'fixed_ip_address': internal_ip_address,
|
|
'fixed_port_id': port_id,
|
|
'router_id': router_id})
|
|
|
|
def create_floatingip(self, context, floatingip):
|
|
fip = floatingip['floatingip']
|
|
tenant_id = self._get_tenant_id_for_create(context, fip)
|
|
fip_id = utils.str_uuid()
|
|
|
|
#TODO(danwent): validate that network_id is valid floatingip-network
|
|
|
|
# This external port is never exposed to the tenant.
|
|
# it is used purely for internal system and admin use when
|
|
# managing floating IPs.
|
|
external_port = self.create_port(context, {
|
|
'port':
|
|
{'network_id': fip['floating_network_id'],
|
|
'mac_address': attributes.ATTR_NOT_SPECIFIED,
|
|
'fixed_ips': attributes.ATTR_NOT_SPECIFIED,
|
|
'admin_state_up': True,
|
|
'device_id': fip_id,
|
|
'device_owner': DEVICE_OWNER_FLOATINGIP,
|
|
'name': ''}})
|
|
# Ensure IP addresses are allocated on external port
|
|
if not external_port['fixed_ips']:
|
|
msg = "Unable to find any IP address on external network"
|
|
# remove the external port
|
|
self.delete_port(context, external_port['id'])
|
|
raise q_exc.BadRequest(resource='floatingip', msg=msg)
|
|
|
|
try:
|
|
with context.session.begin(subtransactions=True):
|
|
floatingip_db = FloatingIP(
|
|
id=fip_id,
|
|
tenant_id=tenant_id,
|
|
floating_network_id=fip['floating_network_id'])
|
|
fip['tenant_id'] = tenant_id
|
|
# Update association with internal port
|
|
# and define external IP address
|
|
self._update_fip_assoc(context, fip,
|
|
floatingip_db, external_port)
|
|
context.session.add(floatingip_db)
|
|
# TODO(salvatore-orlando): Avoid broad catch
|
|
# Maybe by introducing base class for L3 exceptions
|
|
except Exception:
|
|
LOG.exception("Floating IP association failed")
|
|
# Remove the port created for internal purposes
|
|
self.delete_port(context, external_port['id'])
|
|
raise
|
|
|
|
return self._make_floatingip_dict(floatingip_db)
|
|
|
|
def update_floatingip(self, context, id, floatingip):
|
|
fip = floatingip['floatingip']
|
|
with context.session.begin(subtransactions=True):
|
|
floatingip_db = self._get_floatingip(context, id)
|
|
fip['tenant_id'] = floatingip_db['tenant_id']
|
|
fip['id'] = id
|
|
fip_port_id = floatingip_db['floating_port_id']
|
|
self._update_fip_assoc(context, fip, floatingip_db,
|
|
self.get_port(context, fip_port_id))
|
|
return self._make_floatingip_dict(floatingip_db)
|
|
|
|
def delete_floatingip(self, context, id):
|
|
floatingip = self._get_floatingip(context, id)
|
|
with context.session.begin(subtransactions=True):
|
|
context.session.delete(floatingip)
|
|
self.delete_port(context, floatingip['floating_port_id'])
|
|
|
|
def get_floatingip(self, context, id, fields=None, verbose=None):
|
|
floatingip = self._get_floatingip(context, id, verbose=verbose)
|
|
return self._make_floatingip_dict(floatingip, fields)
|
|
|
|
def get_floatingips(self, context, filters=None, fields=None,
|
|
verbose=None):
|
|
return self._get_collection(context, FloatingIP,
|
|
self._make_floatingip_dict,
|
|
filters=filters, fields=fields,
|
|
verbose=verbose)
|
|
|
|
def disassociate_floatingips(self, context, port_id):
|
|
with context.session.begin(subtransactions=True):
|
|
try:
|
|
fip_qry = context.session.query(FloatingIP)
|
|
floating_ip = fip_qry.filter_by(fixed_port_id=port_id).one()
|
|
floating_ip.update({'fixed_port_id': None,
|
|
'fixed_ip_address': None,
|
|
'router_id': None})
|
|
except exc.NoResultFound:
|
|
return
|
|
except exc.MultipleResultsFound:
|
|
# should never happen
|
|
raise Exception('Multiple floating IPs found for port %s'
|
|
% port_id)
|