340 lines
13 KiB
Python
340 lines
13 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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import logging
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from sqlalchemy.orm import exc
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from quantum.common import exceptions as q_exc
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from quantum.db import models_v2
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import quantum.db.api as db
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from quantum.openstack.common import cfg
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from quantum.plugins.openvswitch.common import constants
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from quantum.plugins.openvswitch import ovs_models_v2
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LOG = logging.getLogger(__name__)
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def initialize():
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options = {"sql_connection": "%s" % cfg.CONF.DATABASE.sql_connection}
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options.update({"sql_max_retries": cfg.CONF.DATABASE.sql_max_retries})
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options.update({"reconnect_interval":
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cfg.CONF.DATABASE.reconnect_interval})
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options.update({"base": models_v2.model_base.BASEV2})
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db.configure_db(options)
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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 %s on physical network "
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"%s from pool" %
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(alloc.vlan_id, 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 %s on physical network %s"
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" from pool" %
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(alloc.vlan_id, 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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first())
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if alloc:
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LOG.debug("reserving vlan %s on physical network %s from pool" %
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(alloc.vlan_id, 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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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(physical_network=
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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 %s on physical network %s "
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"from pool" % (vlan_id, 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 %s on physical network %s "
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"outside pool" % (vlan_id, 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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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 %s on physical network %s %s pool" %
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(vlan_id, physical_network,
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inside and "to" or "outside"))
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except exc.NoResultFound:
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LOG.warning("vlan_id %s on physical network %s not found" %
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(vlan_id, 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 %s:%s" %
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tunnel_id_range)
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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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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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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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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" % 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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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 %s pool" %
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(tunnel_id, inside and "to" or "outside"))
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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 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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try:
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tunnels = session.query(ovs_models_v2.TunnelEndpoint).all()
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except exc.NoResultFound:
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return []
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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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try:
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tunnels = session.query(ovs_models_v2.TunnelEndpoint).all()
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except exc.NoResultFound:
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return 0
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tunnel_ids = ([tunnel['id'] for tunnel in tunnels])
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if tunnel_ids:
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id = max(tunnel_ids)
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else:
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id = 0
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return id + 1
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def add_tunnel_endpoint(ip):
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session = db.get_session()
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try:
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tunnel = (session.query(ovs_models_v2.TunnelEndpoint).
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filter_by(ip_address=ip).one())
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except exc.NoResultFound:
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id = _generate_tunnel_id(session)
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tunnel = ovs_models_v2.TunnelEndpoint(ip, id)
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session.add(tunnel)
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session.flush()
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return tunnel
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