142 lines
5.5 KiB
Python
142 lines
5.5 KiB
Python
# Copyright (c) 2013 OpenStack Foundation
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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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from oslo_config import cfg
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from oslo_log import log
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from six import moves
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import sqlalchemy as sa
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from sqlalchemy import sql
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from neutron.common import exceptions as n_exc
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from neutron.db import api as db_api
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from neutron.db import model_base
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from neutron.i18n import _LE
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from neutron.plugins.common import constants as p_const
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from neutron.plugins.ml2.drivers import type_tunnel
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LOG = log.getLogger(__name__)
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vxlan_opts = [
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cfg.ListOpt('vni_ranges',
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default=[],
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help=_("Comma-separated list of <vni_min>:<vni_max> tuples "
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"enumerating ranges of VXLAN VNI IDs that are "
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"available for tenant network allocation")),
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cfg.StrOpt('vxlan_group',
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help=_("Multicast group for VXLAN. If unset, disables VXLAN "
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"multicast mode.")),
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]
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cfg.CONF.register_opts(vxlan_opts, "ml2_type_vxlan")
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class VxlanAllocation(model_base.BASEV2):
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__tablename__ = 'ml2_vxlan_allocations'
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vxlan_vni = sa.Column(sa.Integer, nullable=False, primary_key=True,
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autoincrement=False)
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allocated = sa.Column(sa.Boolean, nullable=False, default=False,
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server_default=sql.false(), index=True)
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class VxlanEndpoints(model_base.BASEV2):
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"""Represents tunnel endpoint in RPC mode."""
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__tablename__ = 'ml2_vxlan_endpoints'
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__table_args__ = (
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sa.UniqueConstraint('host',
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name='unique_ml2_vxlan_endpoints0host'),
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model_base.BASEV2.__table_args__
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)
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ip_address = sa.Column(sa.String(64), primary_key=True)
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udp_port = sa.Column(sa.Integer, nullable=False)
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host = sa.Column(sa.String(255), nullable=True)
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def __repr__(self):
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return "<VxlanTunnelEndpoint(%s)>" % self.ip_address
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class VxlanTypeDriver(type_tunnel.EndpointTunnelTypeDriver):
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def __init__(self):
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super(VxlanTypeDriver, self).__init__(
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VxlanAllocation, VxlanEndpoints)
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def get_type(self):
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return p_const.TYPE_VXLAN
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def initialize(self):
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try:
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self._initialize(cfg.CONF.ml2_type_vxlan.vni_ranges)
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except n_exc.NetworkTunnelRangeError:
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LOG.exception(_LE("Failed to parse vni_ranges. "
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"Service terminated!"))
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raise SystemExit()
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def sync_allocations(self):
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# determine current configured allocatable vnis
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vxlan_vnis = set()
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for tun_min, tun_max in self.tunnel_ranges:
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vxlan_vnis |= set(moves.range(tun_min, tun_max + 1))
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session = db_api.get_session()
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with session.begin(subtransactions=True):
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# remove from table unallocated tunnels not currently allocatable
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# fetch results as list via all() because we'll be iterating
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# through them twice
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allocs = (session.query(VxlanAllocation).
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with_lockmode("update").all())
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# collect all vnis present in db
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existing_vnis = set(alloc.vxlan_vni for alloc in allocs)
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# collect those vnis that needs to be deleted from db
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vnis_to_remove = [alloc.vxlan_vni for alloc in allocs
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if (alloc.vxlan_vni not in vxlan_vnis and
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not alloc.allocated)]
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# Immediately delete vnis in chunks. This leaves no work for
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# flush at the end of transaction
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bulk_size = 100
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chunked_vnis = (vnis_to_remove[i:i + bulk_size] for i in
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range(0, len(vnis_to_remove), bulk_size))
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for vni_list in chunked_vnis:
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if vni_list:
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session.query(VxlanAllocation).filter(
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VxlanAllocation.vxlan_vni.in_(vni_list)).delete(
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synchronize_session=False)
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# collect vnis that need to be added
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vnis = list(vxlan_vnis - existing_vnis)
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chunked_vnis = (vnis[i:i + bulk_size] for i in
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range(0, len(vnis), bulk_size))
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for vni_list in chunked_vnis:
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bulk = [{'vxlan_vni': vni, 'allocated': False}
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for vni in vni_list]
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session.execute(VxlanAllocation.__table__.insert(), bulk)
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def get_endpoints(self):
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"""Get every vxlan endpoints from database."""
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vxlan_endpoints = self._get_endpoints()
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return [{'ip_address': vxlan_endpoint.ip_address,
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'udp_port': vxlan_endpoint.udp_port,
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'host': vxlan_endpoint.host}
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for vxlan_endpoint in vxlan_endpoints]
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def add_endpoint(self, ip, host, udp_port=p_const.VXLAN_UDP_PORT):
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return self._add_endpoint(ip, host, udp_port=udp_port)
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def get_mtu(self, physical_network=None):
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mtu = super(VxlanTypeDriver, self).get_mtu()
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return mtu - p_const.VXLAN_ENCAP_OVERHEAD if mtu else 0
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