2d8632e412
Partial-Bug: #1520094 Change-Id: I874a4aa1d71d1f7034a1ff0b7450b419ef5c6864
270 lines
12 KiB
Python
270 lines
12 KiB
Python
# Copyright (c) 2013 OpenStack Foundation
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import sys
|
|
|
|
from oslo_config import cfg
|
|
from oslo_log import log
|
|
from six import moves
|
|
import sqlalchemy as sa
|
|
|
|
from neutron._i18n import _, _LE, _LI, _LW
|
|
from neutron.common import exceptions as exc
|
|
from neutron.db import api as db_api
|
|
from neutron.db import model_base
|
|
from neutron.plugins.common import constants as p_const
|
|
from neutron.plugins.common import utils as plugin_utils
|
|
from neutron.plugins.ml2 import driver_api as api
|
|
from neutron.plugins.ml2.drivers import helpers
|
|
|
|
LOG = log.getLogger(__name__)
|
|
|
|
vlan_opts = [
|
|
cfg.ListOpt('network_vlan_ranges',
|
|
default=[],
|
|
help=_("List of <physical_network>:<vlan_min>:<vlan_max> or "
|
|
"<physical_network> specifying physical_network names "
|
|
"usable for VLAN provider and tenant networks, as "
|
|
"well as ranges of VLAN tags on each available for "
|
|
"allocation to tenant networks."))
|
|
]
|
|
|
|
cfg.CONF.register_opts(vlan_opts, "ml2_type_vlan")
|
|
|
|
|
|
class VlanAllocation(model_base.BASEV2):
|
|
"""Represent allocation state of a vlan_id on a physical network.
|
|
|
|
If allocated is False, the vlan_id on the physical_network is
|
|
available for allocation to a tenant network. If allocated is
|
|
True, the vlan_id on the physical_network is in use, either as a
|
|
tenant or provider network.
|
|
|
|
When an allocation is released, if the vlan_id for the
|
|
physical_network is inside the pool described by
|
|
VlanTypeDriver.network_vlan_ranges, then allocated is set to
|
|
False. If it is outside the pool, the record is deleted.
|
|
"""
|
|
|
|
__tablename__ = 'ml2_vlan_allocations'
|
|
__table_args__ = (
|
|
sa.Index('ix_ml2_vlan_allocations_physical_network_allocated',
|
|
'physical_network', 'allocated'),
|
|
model_base.BASEV2.__table_args__,)
|
|
|
|
physical_network = sa.Column(sa.String(64), nullable=False,
|
|
primary_key=True)
|
|
vlan_id = sa.Column(sa.Integer, nullable=False, primary_key=True,
|
|
autoincrement=False)
|
|
allocated = sa.Column(sa.Boolean, nullable=False)
|
|
|
|
|
|
class VlanTypeDriver(helpers.SegmentTypeDriver):
|
|
"""Manage state for VLAN networks with ML2.
|
|
|
|
The VlanTypeDriver implements the 'vlan' network_type. VLAN
|
|
network segments provide connectivity between VMs and other
|
|
devices using any connected IEEE 802.1Q conformant
|
|
physical_network segmented into virtual networks via IEEE 802.1Q
|
|
headers. Up to 4094 VLAN network segments can exist on each
|
|
available physical_network.
|
|
"""
|
|
|
|
def __init__(self):
|
|
super(VlanTypeDriver, self).__init__(VlanAllocation)
|
|
self._parse_network_vlan_ranges()
|
|
|
|
def _parse_network_vlan_ranges(self):
|
|
try:
|
|
self.network_vlan_ranges = plugin_utils.parse_network_vlan_ranges(
|
|
cfg.CONF.ml2_type_vlan.network_vlan_ranges)
|
|
except Exception:
|
|
LOG.exception(_LE("Failed to parse network_vlan_ranges. "
|
|
"Service terminated!"))
|
|
sys.exit(1)
|
|
LOG.info(_LI("Network VLAN ranges: %s"), self.network_vlan_ranges)
|
|
|
|
def _sync_vlan_allocations(self):
|
|
session = db_api.get_session()
|
|
with session.begin(subtransactions=True):
|
|
# get existing allocations for all physical networks
|
|
allocations = dict()
|
|
allocs = (session.query(VlanAllocation).
|
|
with_lockmode('update'))
|
|
for alloc in allocs:
|
|
if alloc.physical_network not in allocations:
|
|
allocations[alloc.physical_network] = set()
|
|
allocations[alloc.physical_network].add(alloc)
|
|
|
|
# process vlan ranges for each configured physical network
|
|
for (physical_network,
|
|
vlan_ranges) in self.network_vlan_ranges.items():
|
|
# determine current configured allocatable vlans for
|
|
# this physical network
|
|
vlan_ids = set()
|
|
for vlan_min, vlan_max in vlan_ranges:
|
|
vlan_ids |= set(moves.range(vlan_min, vlan_max + 1))
|
|
|
|
# remove from table unallocated vlans not currently
|
|
# allocatable
|
|
if physical_network in allocations:
|
|
for alloc in allocations[physical_network]:
|
|
try:
|
|
# see if vlan is allocatable
|
|
vlan_ids.remove(alloc.vlan_id)
|
|
except KeyError:
|
|
# it's not allocatable, so check if its allocated
|
|
if not alloc.allocated:
|
|
# it's not, so remove it from table
|
|
LOG.debug("Removing vlan %(vlan_id)s on "
|
|
"physical network "
|
|
"%(physical_network)s from pool",
|
|
{'vlan_id': alloc.vlan_id,
|
|
'physical_network':
|
|
physical_network})
|
|
session.delete(alloc)
|
|
del allocations[physical_network]
|
|
|
|
# add missing allocatable vlans to table
|
|
for vlan_id in sorted(vlan_ids):
|
|
alloc = VlanAllocation(physical_network=physical_network,
|
|
vlan_id=vlan_id,
|
|
allocated=False)
|
|
session.add(alloc)
|
|
|
|
# remove from table unallocated vlans for any unconfigured
|
|
# physical networks
|
|
for allocs in allocations.values():
|
|
for alloc in allocs:
|
|
if not alloc.allocated:
|
|
LOG.debug("Removing vlan %(vlan_id)s on physical "
|
|
"network %(physical_network)s from pool",
|
|
{'vlan_id': alloc.vlan_id,
|
|
'physical_network':
|
|
alloc.physical_network})
|
|
session.delete(alloc)
|
|
|
|
def get_type(self):
|
|
return p_const.TYPE_VLAN
|
|
|
|
def initialize(self):
|
|
self._sync_vlan_allocations()
|
|
LOG.info(_LI("VlanTypeDriver initialization complete"))
|
|
|
|
def is_partial_segment(self, segment):
|
|
return segment.get(api.SEGMENTATION_ID) is None
|
|
|
|
def validate_provider_segment(self, segment):
|
|
physical_network = segment.get(api.PHYSICAL_NETWORK)
|
|
segmentation_id = segment.get(api.SEGMENTATION_ID)
|
|
if physical_network:
|
|
if physical_network not in self.network_vlan_ranges:
|
|
msg = (_("physical_network '%s' unknown "
|
|
" for VLAN provider network") % physical_network)
|
|
raise exc.InvalidInput(error_message=msg)
|
|
if segmentation_id:
|
|
if not plugin_utils.is_valid_vlan_tag(segmentation_id):
|
|
msg = (_("segmentation_id out of range (%(min)s through "
|
|
"%(max)s)") %
|
|
{'min': p_const.MIN_VLAN_TAG,
|
|
'max': p_const.MAX_VLAN_TAG})
|
|
raise exc.InvalidInput(error_message=msg)
|
|
elif segmentation_id:
|
|
msg = _("segmentation_id requires physical_network for VLAN "
|
|
"provider network")
|
|
raise exc.InvalidInput(error_message=msg)
|
|
|
|
for key, value in segment.items():
|
|
if value and key not in [api.NETWORK_TYPE,
|
|
api.PHYSICAL_NETWORK,
|
|
api.SEGMENTATION_ID]:
|
|
msg = _("%s prohibited for VLAN provider network") % key
|
|
raise exc.InvalidInput(error_message=msg)
|
|
|
|
def reserve_provider_segment(self, session, segment):
|
|
filters = {}
|
|
physical_network = segment.get(api.PHYSICAL_NETWORK)
|
|
if physical_network is not None:
|
|
filters['physical_network'] = physical_network
|
|
vlan_id = segment.get(api.SEGMENTATION_ID)
|
|
if vlan_id is not None:
|
|
filters['vlan_id'] = vlan_id
|
|
|
|
if self.is_partial_segment(segment):
|
|
alloc = self.allocate_partially_specified_segment(
|
|
session, **filters)
|
|
if not alloc:
|
|
raise exc.NoNetworkAvailable()
|
|
else:
|
|
alloc = self.allocate_fully_specified_segment(
|
|
session, **filters)
|
|
if not alloc:
|
|
raise exc.VlanIdInUse(**filters)
|
|
|
|
return {api.NETWORK_TYPE: p_const.TYPE_VLAN,
|
|
api.PHYSICAL_NETWORK: alloc.physical_network,
|
|
api.SEGMENTATION_ID: alloc.vlan_id,
|
|
api.MTU: self.get_mtu(alloc.physical_network)}
|
|
|
|
def allocate_tenant_segment(self, session):
|
|
alloc = self.allocate_partially_specified_segment(session)
|
|
if not alloc:
|
|
return
|
|
return {api.NETWORK_TYPE: p_const.TYPE_VLAN,
|
|
api.PHYSICAL_NETWORK: alloc.physical_network,
|
|
api.SEGMENTATION_ID: alloc.vlan_id,
|
|
api.MTU: self.get_mtu(alloc.physical_network)}
|
|
|
|
def release_segment(self, session, segment):
|
|
physical_network = segment[api.PHYSICAL_NETWORK]
|
|
vlan_id = segment[api.SEGMENTATION_ID]
|
|
|
|
ranges = self.network_vlan_ranges.get(physical_network, [])
|
|
inside = any(lo <= vlan_id <= hi for lo, hi in ranges)
|
|
|
|
with session.begin(subtransactions=True):
|
|
query = (session.query(VlanAllocation).
|
|
filter_by(physical_network=physical_network,
|
|
vlan_id=vlan_id))
|
|
if inside:
|
|
count = query.update({"allocated": False})
|
|
if count:
|
|
LOG.debug("Releasing vlan %(vlan_id)s on physical "
|
|
"network %(physical_network)s to pool",
|
|
{'vlan_id': vlan_id,
|
|
'physical_network': physical_network})
|
|
else:
|
|
count = query.delete()
|
|
if count:
|
|
LOG.debug("Releasing vlan %(vlan_id)s on physical "
|
|
"network %(physical_network)s outside pool",
|
|
{'vlan_id': vlan_id,
|
|
'physical_network': physical_network})
|
|
|
|
if not count:
|
|
LOG.warning(_LW("No vlan_id %(vlan_id)s found on physical "
|
|
"network %(physical_network)s"),
|
|
{'vlan_id': vlan_id,
|
|
'physical_network': physical_network})
|
|
|
|
def get_mtu(self, physical_network):
|
|
seg_mtu = super(VlanTypeDriver, self).get_mtu()
|
|
mtu = []
|
|
if seg_mtu > 0:
|
|
mtu.append(seg_mtu)
|
|
if physical_network in self.physnet_mtus:
|
|
mtu.append(int(self.physnet_mtus[physical_network]))
|
|
return min(mtu) if mtu else 0
|