402 lines
16 KiB
Python
402 lines
16 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2011 Nicira Networks, Inc.
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# 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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# @author: Aaron Rosen, Nicira Networks, Inc.
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# @author: Bob Kukura, Red Hat, Inc.
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from sqlalchemy import func
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from sqlalchemy.orm import exc
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from neutron.common import exceptions as q_exc
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import neutron.db.api as db
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from neutron.db import models_v2
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from neutron.db import securitygroups_db as sg_db
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from neutron.extensions import securitygroup as ext_sg
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from neutron import manager
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from neutron.openstack.common.db import exception as db_exc
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from neutron.openstack.common import log as logging
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from neutron.plugins.openvswitch.common import constants
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from neutron.plugins.openvswitch import ovs_models_v2
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LOG = logging.getLogger(__name__)
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def initialize():
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db.configure_db()
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def get_network_binding(session, network_id):
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session = session or db.get_session()
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try:
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binding = (session.query(ovs_models_v2.NetworkBinding).
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filter_by(network_id=network_id).
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one())
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return binding
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except exc.NoResultFound:
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return
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def add_network_binding(session, network_id, network_type,
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physical_network, segmentation_id):
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with session.begin(subtransactions=True):
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binding = ovs_models_v2.NetworkBinding(network_id, network_type,
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physical_network,
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segmentation_id)
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session.add(binding)
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def sync_vlan_allocations(network_vlan_ranges):
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"""Synchronize vlan_allocations table with configured VLAN ranges."""
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session = db.get_session()
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with session.begin():
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# get existing allocations for all physical networks
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allocations = dict()
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allocs = (session.query(ovs_models_v2.VlanAllocation).
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all())
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for alloc in allocs:
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if alloc.physical_network not in allocations:
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allocations[alloc.physical_network] = set()
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allocations[alloc.physical_network].add(alloc)
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# process vlan ranges for each configured physical network
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for physical_network, vlan_ranges in network_vlan_ranges.iteritems():
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# determine current configured allocatable vlans for this
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# physical network
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vlan_ids = set()
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for vlan_range in vlan_ranges:
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vlan_ids |= set(xrange(vlan_range[0], vlan_range[1] + 1))
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# remove from table unallocated vlans not currently allocatable
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if physical_network in allocations:
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for alloc in allocations[physical_network]:
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try:
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# see if vlan is allocatable
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vlan_ids.remove(alloc.vlan_id)
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except KeyError:
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# it's not allocatable, so check if its allocated
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if not alloc.allocated:
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# it's not, so remove it from table
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LOG.debug(_("Removing vlan %(vlan_id)s on "
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"physical network "
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"%(physical_network)s from pool"),
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{'vlan_id': alloc.vlan_id,
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'physical_network': physical_network})
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session.delete(alloc)
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del allocations[physical_network]
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# add missing allocatable vlans to table
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for vlan_id in sorted(vlan_ids):
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alloc = ovs_models_v2.VlanAllocation(physical_network, vlan_id)
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session.add(alloc)
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# remove from table unallocated vlans for any unconfigured physical
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# networks
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for allocs in allocations.itervalues():
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for alloc in allocs:
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if not alloc.allocated:
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LOG.debug(_("Removing vlan %(vlan_id)s on physical "
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"network %(physical_network)s from pool"),
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{'vlan_id': alloc.vlan_id,
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'physical_network': alloc.physical_network})
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session.delete(alloc)
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def get_vlan_allocation(physical_network, vlan_id):
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session = db.get_session()
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try:
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alloc = (session.query(ovs_models_v2.VlanAllocation).
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filter_by(physical_network=physical_network,
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vlan_id=vlan_id).
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one())
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return alloc
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except exc.NoResultFound:
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return
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def reserve_vlan(session):
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with session.begin(subtransactions=True):
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alloc = (session.query(ovs_models_v2.VlanAllocation).
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filter_by(allocated=False).
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with_lockmode('update').
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first())
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if alloc:
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LOG.debug(_("Reserving vlan %(vlan_id)s on physical network "
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"%(physical_network)s from pool"),
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{'vlan_id': alloc.vlan_id,
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'physical_network': alloc.physical_network})
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alloc.allocated = True
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return (alloc.physical_network, alloc.vlan_id)
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raise q_exc.NoNetworkAvailable()
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def reserve_specific_vlan(session, physical_network, vlan_id):
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with session.begin(subtransactions=True):
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try:
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alloc = (session.query(ovs_models_v2.VlanAllocation).
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filter_by(physical_network=physical_network,
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vlan_id=vlan_id).
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with_lockmode('update').
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one())
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if alloc.allocated:
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if vlan_id == constants.FLAT_VLAN_ID:
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raise q_exc.FlatNetworkInUse(
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physical_network=physical_network)
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else:
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raise q_exc.VlanIdInUse(vlan_id=vlan_id,
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physical_network=physical_network)
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LOG.debug(_("Reserving specific vlan %(vlan_id)s on physical "
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"network %(physical_network)s from pool"),
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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alloc.allocated = True
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except exc.NoResultFound:
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LOG.debug(_("Reserving specific vlan %(vlan_id)s on physical "
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"network %(physical_network)s outside pool"),
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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alloc = ovs_models_v2.VlanAllocation(physical_network, vlan_id)
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alloc.allocated = True
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session.add(alloc)
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def release_vlan(session, physical_network, vlan_id, network_vlan_ranges):
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with session.begin(subtransactions=True):
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try:
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alloc = (session.query(ovs_models_v2.VlanAllocation).
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filter_by(physical_network=physical_network,
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vlan_id=vlan_id).
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with_lockmode('update').
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one())
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alloc.allocated = False
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inside = False
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for vlan_range in network_vlan_ranges.get(physical_network, []):
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if vlan_id >= vlan_range[0] and vlan_id <= vlan_range[1]:
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inside = True
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break
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if not inside:
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session.delete(alloc)
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LOG.debug(_("Releasing vlan %(vlan_id)s on physical network "
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"%(physical_network)s outside pool"),
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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else:
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LOG.debug(_("Releasing vlan %(vlan_id)s on physical network "
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"%(physical_network)s to pool"),
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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except exc.NoResultFound:
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LOG.warning(_("vlan_id %(vlan_id)s on physical network "
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"%(physical_network)s not found"),
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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def sync_tunnel_allocations(tunnel_id_ranges):
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"""Synchronize tunnel_allocations table with configured tunnel ranges."""
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# determine current configured allocatable tunnels
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tunnel_ids = set()
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for tunnel_id_range in tunnel_id_ranges:
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tun_min, tun_max = tunnel_id_range
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if tun_max + 1 - tun_min > 1000000:
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LOG.error(_("Skipping unreasonable tunnel ID range "
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"%(tun_min)s:%(tun_max)s"),
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{'tun_min': tun_min, 'tun_max': tun_max})
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else:
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tunnel_ids |= set(xrange(tun_min, tun_max + 1))
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session = db.get_session()
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with session.begin():
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# remove from table unallocated tunnels not currently allocatable
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allocs = (session.query(ovs_models_v2.TunnelAllocation).
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all())
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for alloc in allocs:
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try:
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# see if tunnel is allocatable
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tunnel_ids.remove(alloc.tunnel_id)
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except KeyError:
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# it's not allocatable, so check if its allocated
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if not alloc.allocated:
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# it's not, so remove it from table
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LOG.debug(_("Removing tunnel %s from pool"),
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alloc.tunnel_id)
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session.delete(alloc)
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# add missing allocatable tunnels to table
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for tunnel_id in sorted(tunnel_ids):
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alloc = ovs_models_v2.TunnelAllocation(tunnel_id)
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session.add(alloc)
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def get_tunnel_allocation(tunnel_id):
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session = db.get_session()
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try:
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alloc = (session.query(ovs_models_v2.TunnelAllocation).
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filter_by(tunnel_id=tunnel_id).
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with_lockmode('update').
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one())
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return alloc
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except exc.NoResultFound:
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return
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def reserve_tunnel(session):
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with session.begin(subtransactions=True):
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alloc = (session.query(ovs_models_v2.TunnelAllocation).
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filter_by(allocated=False).
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with_lockmode('update').
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first())
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if alloc:
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LOG.debug(_("Reserving tunnel %s from pool"), alloc.tunnel_id)
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alloc.allocated = True
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return alloc.tunnel_id
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raise q_exc.NoNetworkAvailable()
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def reserve_specific_tunnel(session, tunnel_id):
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with session.begin(subtransactions=True):
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try:
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alloc = (session.query(ovs_models_v2.TunnelAllocation).
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filter_by(tunnel_id=tunnel_id).
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with_lockmode('update').
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one())
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if alloc.allocated:
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raise q_exc.TunnelIdInUse(tunnel_id=tunnel_id)
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LOG.debug(_("Reserving specific tunnel %s from pool"), tunnel_id)
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alloc.allocated = True
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except exc.NoResultFound:
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LOG.debug(_("Reserving specific tunnel %s outside pool"),
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tunnel_id)
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alloc = ovs_models_v2.TunnelAllocation(tunnel_id)
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alloc.allocated = True
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session.add(alloc)
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def release_tunnel(session, tunnel_id, tunnel_id_ranges):
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with session.begin(subtransactions=True):
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try:
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alloc = (session.query(ovs_models_v2.TunnelAllocation).
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filter_by(tunnel_id=tunnel_id).
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with_lockmode('update').
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one())
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alloc.allocated = False
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inside = False
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for tunnel_id_range in tunnel_id_ranges:
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if (tunnel_id >= tunnel_id_range[0]
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and tunnel_id <= tunnel_id_range[1]):
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inside = True
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break
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if not inside:
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session.delete(alloc)
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LOG.debug(_("Releasing tunnel %s outside pool"), tunnel_id)
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else:
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LOG.debug(_("Releasing tunnel %s to pool"), tunnel_id)
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except exc.NoResultFound:
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LOG.warning(_("tunnel_id %s not found"), tunnel_id)
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def get_port(port_id):
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session = db.get_session()
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try:
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port = session.query(models_v2.Port).filter_by(id=port_id).one()
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except exc.NoResultFound:
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port = None
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return port
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def get_port_from_device(port_id):
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"""Get port from database."""
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LOG.debug(_("get_port_with_securitygroups() called:port_id=%s"), port_id)
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session = db.get_session()
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sg_binding_port = sg_db.SecurityGroupPortBinding.port_id
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query = session.query(models_v2.Port,
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sg_db.SecurityGroupPortBinding.security_group_id)
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query = query.outerjoin(sg_db.SecurityGroupPortBinding,
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models_v2.Port.id == sg_binding_port)
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query = query.filter(models_v2.Port.id == port_id)
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port_and_sgs = query.all()
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if not port_and_sgs:
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return None
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port = port_and_sgs[0][0]
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plugin = manager.NeutronManager.get_plugin()
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port_dict = plugin._make_port_dict(port)
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port_dict[ext_sg.SECURITYGROUPS] = [
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sg_id for port_, sg_id in port_and_sgs if sg_id]
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port_dict['security_group_rules'] = []
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port_dict['security_group_source_groups'] = []
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port_dict['fixed_ips'] = [ip['ip_address']
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for ip in port['fixed_ips']]
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return port_dict
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def set_port_status(port_id, status):
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session = db.get_session()
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try:
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port = session.query(models_v2.Port).filter_by(id=port_id).one()
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port['status'] = status
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session.merge(port)
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session.flush()
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except exc.NoResultFound:
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raise q_exc.PortNotFound(port_id=port_id)
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def get_tunnel_endpoints():
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session = db.get_session()
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tunnels = session.query(ovs_models_v2.TunnelEndpoint)
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return [{'id': tunnel.id,
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'ip_address': tunnel.ip_address} for tunnel in tunnels]
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def _generate_tunnel_id(session):
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max_tunnel_id = session.query(
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func.max(ovs_models_v2.TunnelEndpoint.id)).scalar() or 0
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return max_tunnel_id + 1
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def add_tunnel_endpoint(ip, max_retries=10):
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"""Return the endpoint of the given IP address or generate a new one."""
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# NOTE(rpodolyaka): generation of a new tunnel endpoint must be put into a
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# repeatedly executed transactional block to ensure it
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# doesn't conflict with any other concurrently executed
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# DB transactions in spite of the specified transactions
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# isolation level value
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for i in xrange(max_retries):
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LOG.debug(_('Adding a tunnel endpoint for %s'), ip)
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try:
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session = db.get_session()
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with session.begin(subtransactions=True):
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tunnel = (session.query(ovs_models_v2.TunnelEndpoint).
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filter_by(ip_address=ip).with_lockmode('update').
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first())
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if tunnel is None:
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tunnel_id = _generate_tunnel_id(session)
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tunnel = ovs_models_v2.TunnelEndpoint(ip, tunnel_id)
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session.add(tunnel)
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return tunnel
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except db_exc.DBDuplicateEntry:
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# a concurrent transaction has been commited, try again
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LOG.debug(_('Adding a tunnel endpoint failed due to a concurrent'
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'transaction had been commited (%s attempts left)'),
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max_retries - (i + 1))
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raise q_exc.NeutronException(
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message=_('Unable to generate a new tunnel id'))
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