442 lines
19 KiB
Python
442 lines
19 KiB
Python
# Copyright 2017 VMware, 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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from oslo_log import log as logging
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from neutron.db import address_scope_db
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from neutron.db import db_base_plugin_v2
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from neutron.db import l3_attrs_db
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from neutron.db import l3_db
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from neutron.db import models_v2
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from neutron_lib.api.definitions import address_scope as ext_address_scope
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from neutron_lib.api.definitions import availability_zone as az_def
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from neutron_lib.api.definitions import network as net_def
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from neutron_lib.api.definitions import port as port_def
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from neutron_lib.api.definitions import subnet as subnet_def
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from neutron_lib.api import validators
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from neutron_lib.api.validators import availability_zone as az_validator
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from neutron_lib.callbacks import events
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from neutron_lib.callbacks import registry
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from neutron_lib.callbacks import resources
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from neutron_lib import constants
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from neutron_lib import context as n_context
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from neutron_lib.db import api as db_api
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from neutron_lib.db import resource_extend
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from neutron_lib import exceptions as n_exc
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from neutron_lib.plugins import directory
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from neutron_lib.utils import net as nl_net_utils
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from vmware_nsx._i18n import _
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from vmware_nsx.common import exceptions as nsx_exc
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from vmware_nsx.services.qos.common import utils as qos_com_utils
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LOG = logging.getLogger(__name__)
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@resource_extend.has_resource_extenders
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class NsxPluginBase(db_base_plugin_v2.NeutronDbPluginV2,
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address_scope_db.AddressScopeDbMixin):
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"""Common methods for NSX-V, NSX-V3 and NSX-P plugins"""
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@property
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def plugin_type(self):
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return "Unknown"
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@staticmethod
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@resource_extend.extends([net_def.COLLECTION_NAME])
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def _ext_extend_network_dict(result, netdb):
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ctx = n_context.get_admin_context()
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# get the core plugin as this is a static method with no 'self'
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plugin = directory.get_plugin()
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with db_api.CONTEXT_WRITER.using(ctx):
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plugin._extension_manager.extend_network_dict(
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ctx.session, netdb, result)
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@staticmethod
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@resource_extend.extends([port_def.COLLECTION_NAME])
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def _ext_extend_port_dict(result, portdb):
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ctx = n_context.get_admin_context()
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# get the core plugin as this is a static method with no 'self'
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plugin = directory.get_plugin()
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with db_api.CONTEXT_WRITER.using(ctx):
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plugin._extension_manager.extend_port_dict(
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ctx.session, portdb, result)
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@staticmethod
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@resource_extend.extends([subnet_def.COLLECTION_NAME])
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def _ext_extend_subnet_dict(result, subnetdb):
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ctx = n_context.get_admin_context()
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# get the core plugin as this is a static method with no 'self'
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plugin = directory.get_plugin()
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with db_api.CONTEXT_WRITER.using(ctx):
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plugin._extension_manager.extend_subnet_dict(
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ctx.session, subnetdb, result)
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def get_network_az_by_net_id(self, context, network_id):
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try:
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network = self.get_network(context, network_id)
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except Exception:
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return self.get_default_az()
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return self.get_network_az(network)
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def _get_router_interface_ports_by_network(
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self, context, router_id, network_id):
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port_filters = {'device_id': [router_id],
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'device_owner': [l3_db.DEVICE_OWNER_ROUTER_INTF],
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'network_id': [network_id]}
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return self.get_ports(context, filters=port_filters)
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def get_router_for_floatingip(self, context, internal_port,
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internal_subnet, external_network_id):
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router_id = super(NsxPluginBase, self).get_router_for_floatingip(
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context, internal_port, internal_subnet, external_network_id)
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if router_id:
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router = self._get_router(context.elevated(), router_id)
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if not router.enable_snat:
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msg = _("Unable to assign a floating IP to a router that "
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"has SNAT disabled")
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raise n_exc.InvalidInput(error_message=msg)
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return router_id
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def _get_network_address_scope(self, context, net_id):
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network = self.get_network(context, net_id)
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return network.get(ext_address_scope.IPV4_ADDRESS_SCOPE)
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def _get_subnet_address_scope(self, context, subnet_id):
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subnet = self.get_subnet(context, subnet_id)
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if not subnet['subnetpool_id']:
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return
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subnetpool = self.get_subnetpool(context, subnet['subnetpool_id'])
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return subnetpool.get('address_scope_id', '')
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def _get_subnetpool_address_scope(self, context, subnetpool_id):
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if not subnetpool_id:
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return
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subnetpool = self.get_subnetpool(context, subnetpool_id)
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return subnetpool.get('address_scope_id', '')
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def _validate_address_scope_for_router_interface(self, context, router_id,
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gw_network_id, subnet_id):
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"""Validate that the GW address scope is the same as the interface"""
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gw_address_scope = self._get_network_address_scope(context,
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gw_network_id)
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if not gw_address_scope:
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return
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subnet_address_scope = self._get_subnet_address_scope(context,
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subnet_id)
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if (not subnet_address_scope or
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subnet_address_scope != gw_address_scope):
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raise nsx_exc.NsxRouterInterfaceDoesNotMatchAddressScope(
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router_id=router_id, address_scope_id=gw_address_scope)
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def _get_router_interfaces(self, context, router_id):
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port_filters = {'device_id': [router_id],
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'device_owner': [l3_db.DEVICE_OWNER_ROUTER_INTF]}
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return self.get_ports(context, filters=port_filters)
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def _find_router_subnets_cidrs(self, context, router_id):
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"""Retrieve cidrs of subnets attached to the specified router."""
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subnets = self._find_router_subnets(context, router_id)
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return [subnet['cidr'] for subnet in subnets]
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def _find_router_subnets_cidrs_per_addr_scope(self, context, router_id):
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"""Generate a list of cidrs per address pool.
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Go over all the router interface subnets.
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return a list of lists of subnets cidrs belonging to same
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address pool.
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"""
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subnets = self._find_router_subnets(context, router_id)
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cidrs_map = {}
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for subnet in subnets:
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ads = self._get_subnetpool_address_scope(
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context, subnet['subnetpool_id']) or ''
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if ads not in cidrs_map:
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cidrs_map[ads] = []
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cidrs_map[ads].append(subnet['cidr'])
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return list(cidrs_map.values())
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def _get_port_by_device_id(self, context, device_id, device_owner):
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"""Retrieve ports associated with a specific device id.
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Used for retrieving all neutron ports attached to a given router.
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"""
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port_qry = context.session.query(models_v2.Port)
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return port_qry.filter_by(
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device_id=device_id,
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device_owner=device_owner,).all()
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def _update_filters_with_sec_group(self, context, filters=None):
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if filters is not None:
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security_groups = filters.pop("security_groups", None)
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if security_groups:
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bindings = (
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super(NsxPluginBase, self)
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._get_port_security_group_bindings(context,
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filters={'security_group_id': security_groups}))
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if 'id' in filters:
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filters['id'] = [entry['port_id'] for
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entry in bindings
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if entry['port_id'] in filters['id']]
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else:
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filters['id'] = [entry['port_id'] for entry in bindings]
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def _find_router_subnets(self, context, router_id):
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"""Retrieve subnets attached to the specified router."""
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ports = self._get_port_by_device_id(context, router_id,
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l3_db.DEVICE_OWNER_ROUTER_INTF)
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# No need to check for overlapping CIDRs
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subnets = []
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for port in ports:
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for ip in port.get('fixed_ips', []):
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subnet_qry = context.session.query(models_v2.Subnet)
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subnet = subnet_qry.filter_by(id=ip.subnet_id).one()
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subnets.append({'id': subnet.id, 'cidr': subnet.cidr,
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'subnetpool_id': subnet.subnetpool_id,
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'ip_version': subnet.ip_version,
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'network_id': subnet.network_id})
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return subnets
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def _find_router_gw_subnets(self, context, router):
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"""Retrieve external subnets attached to router GW"""
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if not router['external_gateway_info']:
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return []
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subnets = []
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for fip in router['external_gateway_info']['external_fixed_ips']:
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subnet = self.get_subnet(context, fip['subnet_id'])
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subnets.append(subnet)
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return subnets
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def recalculate_snat_rules_for_router(self, context, router, subnets):
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"""Method to recalculate router snat rules for specific subnets.
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Invoked when subnetpool address scope changes.
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Implemented in child plugin classes
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"""
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pass
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def recalculate_fw_rules_for_router(self, context, router, subnets):
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"""Method to recalculate router FW rules for specific subnets.
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Invoked when subnetpool address scope changes.
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Implemented in child plugin classes
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"""
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pass
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def _filter_subnets_by_subnetpool(self, subnets, subnetpool_id):
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return [subnet for subnet in subnets
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if subnet['subnetpool_id'] == subnetpool_id]
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def on_subnetpool_address_scope_updated(self, resource, event,
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trigger, **kwargs):
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context = kwargs['context']
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routers = self.get_routers(context)
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subnetpool_id = kwargs['subnetpool_id']
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elevated_context = context.elevated()
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LOG.info("Inspecting routers for potential configuration changes "
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"due to address scope change on subnetpool %s", subnetpool_id)
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for rtr in routers:
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subnets = self._find_router_subnets(elevated_context,
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rtr['id'])
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gw_subnets = self._find_router_gw_subnets(elevated_context,
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rtr)
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affected_subnets = self._filter_subnets_by_subnetpool(
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subnets, subnetpool_id)
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affected_gw_subnets = self._filter_subnets_by_subnetpool(
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gw_subnets, subnetpool_id)
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if not affected_subnets and not affected_gw_subnets:
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# No subnets were affected by address scope change
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continue
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if (affected_subnets == subnets and
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affected_gw_subnets == gw_subnets):
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# All subnets remain under the same address scope
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# (all router subnets were allocated from subnetpool_id)
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continue
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# Update east-west FW rules
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self.recalculate_fw_rules_for_router(context, rtr,
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affected_subnets)
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if not rtr['external_gateway_info']:
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continue
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if not rtr['external_gateway_info']['enable_snat']:
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LOG.warning("Due to address scope change on subnetpool "
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"%(subnetpool)s, uniqueness on interface "
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"addresses on no-snat router %(router) is no "
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"longer guaranteed, which may result in faulty "
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"operation.", {'subnetpool': subnetpool_id,
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'router': rtr['id']})
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continue
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if affected_gw_subnets:
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# GW address scope have changed - we need to revisit snat
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# rules for all router interfaces
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affected_subnets = subnets
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self.recalculate_snat_rules_for_router(context, rtr,
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affected_subnets)
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def _validate_max_ips_per_port(self, fixed_ip_list, device_owner):
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"""Validate the number of fixed ips on a port
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Do not allow multiple ip addresses on a port since the nsx backend
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cannot add multiple static dhcp bindings with the same port
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"""
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if (device_owner and
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nl_net_utils.is_port_trusted({'device_owner': device_owner})):
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return
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if validators.is_attr_set(fixed_ip_list) and len(fixed_ip_list) > 1:
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msg = _('Exceeded maximum amount of fixed ips per port')
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raise n_exc.InvalidInput(error_message=msg)
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def _extract_external_gw(self, context, router, is_extract=True):
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r = router['router']
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gw_info = constants.ATTR_NOT_SPECIFIED
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# First extract the gateway info in case of updating
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# gateway before edge is deployed.
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if 'external_gateway_info' in r:
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gw_info = r.get('external_gateway_info', {})
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if is_extract:
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del r['external_gateway_info']
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network_id = (gw_info.get('network_id') if gw_info
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else None)
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if network_id:
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ext_net = self._get_network(context, network_id)
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if not ext_net.external:
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msg = (_("Network '%s' is not a valid external network") %
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network_id)
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raise n_exc.BadRequest(resource='router', msg=msg)
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subnets = self._get_subnets_by_network(context.elevated(),
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network_id)
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if not subnets:
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msg = _("Cannot update gateway on Network '%s' "
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"with no subnet") % network_id
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raise n_exc.BadRequest(resource='router', msg=msg)
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return gw_info
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def get_subnets_by_network(self, context, network_id):
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return [self._make_subnet_dict(subnet_obj) for subnet_obj in
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self._get_subnets_by_network(context.elevated(), network_id)]
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def _validate_routes(self, context, router_id, routes):
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super(NsxPluginBase, self)._validate_routes(
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context, router_id, routes)
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# do not allow adding a default route. NSX-v/v3 don't support it
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for route in routes:
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if route.get('destination', '').startswith('0.0.0.0/'):
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msg = _("Cannot set a default route using static routes")
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raise n_exc.BadRequest(resource='router', msg=msg)
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@staticmethod
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@resource_extend.extends([net_def.COLLECTION_NAME])
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def _extend_availability_zone_hints(net_res, net_db):
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net_res[az_def.AZ_HINTS] = az_validator.convert_az_string_to_list(
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net_db[az_def.AZ_HINTS])
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def _validate_external_subnet(self, context, network_id):
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filters = {'id': [network_id], 'router:external': [True]}
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nets = self.get_networks(context, filters=filters)
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if len(nets) > 0:
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err_msg = _("Can not enable DHCP on external network")
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raise n_exc.InvalidInput(error_message=err_msg)
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def _validate_host_routes_input(self, subnet_input,
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orig_enable_dhcp=None,
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orig_host_routes=None):
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s = subnet_input['subnet']
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request_host_routes = (validators.is_attr_set(s.get('host_routes')) and
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s['host_routes'])
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clear_host_routes = (validators.is_attr_set(s.get('host_routes')) and
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not s['host_routes'])
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request_enable_dhcp = s.get('enable_dhcp')
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if request_enable_dhcp is False:
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if (request_host_routes or
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not clear_host_routes and orig_host_routes):
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err_msg = _("Can't disable DHCP while using host routes")
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raise n_exc.InvalidInput(error_message=err_msg)
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if request_host_routes:
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if not request_enable_dhcp and orig_enable_dhcp is False:
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err_msg = _("Host routes can only be supported when DHCP "
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"is enabled")
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raise n_exc.InvalidInput(error_message=err_msg)
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def _validate_qos_policy_id(self, context, qos_policy_id):
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if qos_policy_id:
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qos_com_utils.validate_policy_accessable(context, qos_policy_id)
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def _get_interface_network(self, context, interface_info):
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is_port, is_sub = self._validate_interface_info(interface_info)
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if is_port:
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net_id = self.get_port(context,
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interface_info['port_id'])['network_id']
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elif is_sub:
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net_id = self.get_subnet(context,
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interface_info['subnet_id'])['network_id']
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return net_id
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def _process_extra_attr_router_create(self, context, router_db, r):
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for extra_attr in l3_attrs_db.get_attr_info().keys():
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if (extra_attr in r and
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validators.is_attr_set(r.get(extra_attr))):
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self.set_extra_attr_value(context, router_db,
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extra_attr, r[extra_attr])
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def get_housekeeper(self, context, name, fields=None):
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# run the job in readonly mode and get the results
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self.housekeeper.run(context, name, readonly=True)
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return self.housekeeper.get(name)
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def get_housekeepers(self, context, filters=None, fields=None, sorts=None,
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limit=None, marker=None, page_reverse=False):
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return self.housekeeper.list()
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def update_housekeeper(self, context, name, housekeeper):
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# run the job in non-readonly mode and get the results
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if not self.housekeeper.readwrite_allowed(name):
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err_msg = (_("Can not run housekeeper job %s in readwrite "
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"mode") % name)
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raise n_exc.InvalidInput(error_message=err_msg)
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self.housekeeper.run(context, name, readonly=False)
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return self.housekeeper.get(name)
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def get_housekeeper_count(self, context, filters=None):
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return len(self.housekeeper.list())
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# Register the callback
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def _validate_network_has_subnet(resource, event, trigger, **kwargs):
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network_id = kwargs.get('network_id')
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subnets = kwargs.get('subnets')
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if not subnets:
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msg = _('No subnet defined on network %s') % network_id
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raise n_exc.InvalidInput(error_message=msg)
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def subscribe():
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registry.subscribe(_validate_network_has_subnet,
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resources.ROUTER_GATEWAY, events.BEFORE_CREATE)
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subscribe()
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