325 lines
14 KiB
Python
325 lines
14 KiB
Python
# Copyright (c) 2016 IBM
|
|
# 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.
|
|
|
|
from neutron_lib.api import validators
|
|
from neutron_lib import exceptions as n_exc
|
|
from oslo_config import cfg
|
|
from oslo_log import log as logging
|
|
import sqlalchemy as sa
|
|
from sqlalchemy import orm
|
|
|
|
from neutron._i18n import _, _LE
|
|
from neutron.common import utils
|
|
from neutron.db import db_base_plugin_v2
|
|
from neutron.db import l3_db
|
|
from neutron.db import model_base
|
|
from neutron.db import models_v2
|
|
from neutron.extensions import dns
|
|
from neutron.extensions import l3
|
|
from neutron.services.externaldns import driver
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class NetworkDNSDomain(model_base.BASEV2):
|
|
network_id = sa.Column(sa.String(36),
|
|
sa.ForeignKey('networks.id', ondelete="CASCADE"),
|
|
primary_key=True,
|
|
index=True)
|
|
dns_domain = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
|
|
# Add a relationship to the Network model in order to instruct
|
|
# SQLAlchemy to eagerly load this association
|
|
network = orm.relationship(models_v2.Network,
|
|
backref=orm.backref("dns_domain",
|
|
lazy='joined',
|
|
uselist=False,
|
|
cascade='delete'))
|
|
|
|
|
|
class FloatingIPDNS(model_base.BASEV2):
|
|
|
|
__tablename__ = 'floatingipdnses'
|
|
|
|
floatingip_id = sa.Column(sa.String(36),
|
|
sa.ForeignKey('floatingips.id',
|
|
ondelete="CASCADE"),
|
|
primary_key=True,
|
|
index=True)
|
|
dns_name = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
dns_domain = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
published_dns_name = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
published_dns_domain = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
|
|
# Add a relationship to the FloatingIP model in order to instruct
|
|
# SQLAlchemy to eagerly load this association
|
|
floatingip = orm.relationship(l3_db.FloatingIP,
|
|
backref=orm.backref("dns",
|
|
lazy='joined',
|
|
uselist=False,
|
|
cascade='delete'))
|
|
|
|
|
|
class PortDNS(model_base.BASEV2):
|
|
|
|
__tablename__ = 'portdnses'
|
|
|
|
port_id = sa.Column(sa.String(36),
|
|
sa.ForeignKey('ports.id',
|
|
ondelete="CASCADE"),
|
|
primary_key=True,
|
|
index=True)
|
|
current_dns_name = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
current_dns_domain = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
previous_dns_name = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
previous_dns_domain = sa.Column(sa.String(255),
|
|
nullable=False)
|
|
|
|
# Add a relationship to the Port model in order to instruct
|
|
# SQLAlchemy to eagerly load this association
|
|
port = orm.relationship(models_v2.Port,
|
|
backref=orm.backref("dns",
|
|
lazy='joined',
|
|
uselist=False,
|
|
cascade='delete'))
|
|
|
|
|
|
class DNSActionsData(object):
|
|
|
|
def __init__(self, current_dns_name=None, current_dns_domain=None,
|
|
previous_dns_name=None, previous_dns_domain=None):
|
|
self.current_dns_name = current_dns_name
|
|
self.current_dns_domain = current_dns_domain
|
|
self.previous_dns_name = previous_dns_name
|
|
self.previous_dns_domain = previous_dns_domain
|
|
|
|
|
|
class DNSDbMixin(object):
|
|
"""Mixin class to add DNS methods to db_base_plugin_v2."""
|
|
|
|
_dns_driver = None
|
|
|
|
@property
|
|
def dns_driver(self):
|
|
if self._dns_driver:
|
|
return self._dns_driver
|
|
if not cfg.CONF.external_dns_driver:
|
|
return
|
|
try:
|
|
self._dns_driver = driver.ExternalDNSService.get_instance()
|
|
LOG.debug("External DNS driver loaded: %s",
|
|
cfg.CONF.external_dns_driver)
|
|
return self._dns_driver
|
|
except ImportError:
|
|
LOG.exception(_LE("ImportError exception occurred while loading "
|
|
"the external DNS service driver"))
|
|
raise dns.ExternalDNSDriverNotFound(
|
|
driver=cfg.CONF.external_dns_driver)
|
|
|
|
def _extend_floatingip_dict_dns(self, floatingip_res, floatingip_db):
|
|
floatingip_res['dns_domain'] = ''
|
|
floatingip_res['dns_name'] = ''
|
|
if floatingip_db.dns:
|
|
floatingip_res['dns_domain'] = floatingip_db.dns['dns_domain']
|
|
floatingip_res['dns_name'] = floatingip_db.dns['dns_name']
|
|
return floatingip_res
|
|
|
|
# Register dict extend functions for floating ips
|
|
db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
|
|
l3.FLOATINGIPS, ['_extend_floatingip_dict_dns'])
|
|
|
|
def _process_dns_floatingip_create_precommit(self, context,
|
|
floatingip_data, req_data):
|
|
# expects to be called within a plugin's session
|
|
dns_domain = req_data.get(dns.DNSDOMAIN)
|
|
if not validators.is_attr_set(dns_domain):
|
|
return
|
|
if not self.dns_driver:
|
|
return
|
|
|
|
dns_name = req_data[dns.DNSNAME]
|
|
self._validate_floatingip_dns(dns_name, dns_domain)
|
|
|
|
current_dns_name, current_dns_domain = (
|
|
self._get_requested_state_for_external_dns_service_create(
|
|
context, floatingip_data, req_data))
|
|
dns_actions_data = None
|
|
if current_dns_name and current_dns_domain:
|
|
context.session.add(FloatingIPDNS(
|
|
floatingip_id=floatingip_data['id'],
|
|
dns_name=req_data[dns.DNSNAME],
|
|
dns_domain=req_data[dns.DNSDOMAIN],
|
|
published_dns_name=current_dns_name,
|
|
published_dns_domain=current_dns_domain))
|
|
dns_actions_data = DNSActionsData(
|
|
current_dns_name=current_dns_name,
|
|
current_dns_domain=current_dns_domain)
|
|
floatingip_data['dns_name'] = dns_name
|
|
floatingip_data['dns_domain'] = dns_domain
|
|
return dns_actions_data
|
|
|
|
def _process_dns_floatingip_create_postcommit(self, context,
|
|
floatingip_data,
|
|
dns_actions_data):
|
|
if not dns_actions_data:
|
|
return
|
|
self._add_ips_to_external_dns_service(
|
|
context, dns_actions_data.current_dns_domain,
|
|
dns_actions_data.current_dns_name,
|
|
[floatingip_data['floating_ip_address']])
|
|
|
|
def _process_dns_floatingip_update_precommit(self, context,
|
|
floatingip_data):
|
|
# expects to be called within a plugin's session
|
|
if not utils.is_extension_supported(self._core_plugin,
|
|
dns.Dns.get_alias()):
|
|
return
|
|
if not self.dns_driver:
|
|
return
|
|
dns_data_db = context.session.query(FloatingIPDNS).filter_by(
|
|
floatingip_id=floatingip_data['id']).one_or_none()
|
|
if dns_data_db and dns_data_db['dns_name']:
|
|
# dns_name and dns_domain assigned for floating ip. It doesn't
|
|
# matter whether they are defined for internal port
|
|
return
|
|
current_dns_name, current_dns_domain = (
|
|
self._get_requested_state_for_external_dns_service_update(
|
|
context, floatingip_data))
|
|
if dns_data_db:
|
|
if (dns_data_db['published_dns_name'] != current_dns_name or
|
|
dns_data_db['published_dns_domain'] != current_dns_domain):
|
|
dns_actions_data = DNSActionsData(
|
|
previous_dns_name=dns_data_db['published_dns_name'],
|
|
previous_dns_domain=dns_data_db['published_dns_domain'])
|
|
if current_dns_name and current_dns_domain:
|
|
dns_data_db['published_dns_name'] = current_dns_name
|
|
dns_data_db['published_dns_domain'] = current_dns_domain
|
|
dns_actions_data.current_dns_name = current_dns_name
|
|
dns_actions_data.current_dns_domain = current_dns_domain
|
|
else:
|
|
context.session.delete(dns_data_db)
|
|
return dns_actions_data
|
|
else:
|
|
return
|
|
if current_dns_name and current_dns_domain:
|
|
context.session.add(FloatingIPDNS(
|
|
floatingip_id=floatingip_data['id'],
|
|
dns_name='',
|
|
dns_domain='',
|
|
published_dns_name=current_dns_name,
|
|
published_dns_domain=current_dns_domain))
|
|
return DNSActionsData(current_dns_name=current_dns_name,
|
|
current_dns_domain=current_dns_domain)
|
|
|
|
def _process_dns_floatingip_update_postcommit(self, context,
|
|
floatingip_data,
|
|
dns_actions_data):
|
|
if not dns_actions_data:
|
|
return
|
|
if dns_actions_data.previous_dns_name:
|
|
self._delete_floatingip_from_external_dns_service(
|
|
context, dns_actions_data.previous_dns_domain,
|
|
dns_actions_data.previous_dns_name,
|
|
[floatingip_data['floating_ip_address']])
|
|
if dns_actions_data.current_dns_name:
|
|
self._add_ips_to_external_dns_service(
|
|
context, dns_actions_data.current_dns_domain,
|
|
dns_actions_data.current_dns_name,
|
|
[floatingip_data['floating_ip_address']])
|
|
|
|
def _process_dns_floatingip_delete(self, context, floatingip_data):
|
|
if not utils.is_extension_supported(self._core_plugin,
|
|
dns.Dns.get_alias()):
|
|
return
|
|
dns_data_db = context.session.query(FloatingIPDNS).filter_by(
|
|
floatingip_id=floatingip_data['id']).one_or_none()
|
|
if dns_data_db:
|
|
self._delete_floatingip_from_external_dns_service(
|
|
context, dns_data_db['published_dns_domain'],
|
|
dns_data_db['published_dns_name'],
|
|
[floatingip_data['floating_ip_address']])
|
|
|
|
def _validate_floatingip_dns(self, dns_name, dns_domain):
|
|
if dns_domain and not dns_name:
|
|
msg = _("dns_domain cannot be specified without a dns_name")
|
|
raise n_exc.BadRequest(resource='floatingip', msg=msg)
|
|
if dns_name and not dns_domain:
|
|
msg = _("dns_name cannot be specified without a dns_domain")
|
|
raise n_exc.BadRequest(resource='floatingip', msg=msg)
|
|
|
|
def _get_internal_port_dns_data(self, context, floatingip_data):
|
|
internal_port = context.session.query(models_v2.Port).filter_by(
|
|
id=floatingip_data['port_id']).one()
|
|
dns_domain = None
|
|
if internal_port['dns_name']:
|
|
net_dns = context.session.query(NetworkDNSDomain).filter_by(
|
|
network_id=internal_port['network_id']).one_or_none()
|
|
if net_dns:
|
|
dns_domain = net_dns['dns_domain']
|
|
return internal_port['dns_name'], dns_domain
|
|
|
|
def _delete_floatingip_from_external_dns_service(self, context, dns_domain,
|
|
dns_name, records):
|
|
try:
|
|
self.dns_driver.delete_record_set(context, dns_domain, dns_name,
|
|
records)
|
|
except (dns.DNSDomainNotFound, dns.DuplicateRecordSet) as e:
|
|
LOG.exception(_LE("Error deleting Floating IP data from external "
|
|
"DNS service. Name: '%(name)s'. Domain: "
|
|
"'%(domain)s'. IP addresses '%(ips)s'. DNS "
|
|
"service driver message '%(message)s'"),
|
|
{"name": dns_name,
|
|
"domain": dns_domain,
|
|
"message": e.msg,
|
|
"ips": ', '.join(records)})
|
|
|
|
def _get_requested_state_for_external_dns_service_create(self, context,
|
|
floatingip_data,
|
|
req_data):
|
|
fip_dns_name = req_data[dns.DNSNAME]
|
|
if fip_dns_name:
|
|
return fip_dns_name, req_data[dns.DNSDOMAIN]
|
|
if floatingip_data['port_id']:
|
|
return self._get_internal_port_dns_data(context, floatingip_data)
|
|
return None, None
|
|
|
|
def _get_requested_state_for_external_dns_service_update(self, context,
|
|
floatingip_data):
|
|
if floatingip_data['port_id']:
|
|
return self._get_internal_port_dns_data(context, floatingip_data)
|
|
return None, None
|
|
|
|
def _add_ips_to_external_dns_service(self, context, dns_domain, dns_name,
|
|
records):
|
|
try:
|
|
self.dns_driver.create_record_set(context, dns_domain, dns_name,
|
|
records)
|
|
except (dns.DNSDomainNotFound, dns.DuplicateRecordSet) as e:
|
|
LOG.exception(_LE("Error publishing floating IP data in external "
|
|
"DNS service. Name: '%(name)s'. Domain: "
|
|
"'%(domain)s'. DNS service driver message "
|
|
"'%(message)s'"),
|
|
{"name": dns_name,
|
|
"domain": dns_domain,
|
|
"message": e.msg})
|