256 lines
12 KiB
Python
256 lines
12 KiB
Python
# Copyright (c) 2016 IBM
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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 neutron_lib.api.definitions import dns as dns_apidef
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from neutron_lib.api.definitions import l3 as l3_apidef
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from neutron_lib.api import extensions
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from neutron_lib.api import validators
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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.exceptions import dns as dns_exc
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from oslo_config import cfg
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from oslo_log import log as logging
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from neutron._i18n import _
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from neutron.objects import floatingip as fip_obj
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from neutron.objects import network
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from neutron.objects import ports as port_obj
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from neutron.services.externaldns import driver
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LOG = logging.getLogger(__name__)
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class DNSActionsData(object):
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def __init__(self, current_dns_name=None, current_dns_domain=None,
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previous_dns_name=None, previous_dns_domain=None):
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self.current_dns_name = current_dns_name
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self.current_dns_domain = current_dns_domain
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self.previous_dns_name = previous_dns_name
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self.previous_dns_domain = previous_dns_domain
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@resource_extend.has_resource_extenders
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class DNSDbMixin(object):
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"""Mixin class to add DNS methods to db_base_plugin_v2."""
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_dns_driver = None
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@property
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def dns_driver(self):
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if self._dns_driver:
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return self._dns_driver
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if not cfg.CONF.external_dns_driver:
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return
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try:
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self._dns_driver = driver.ExternalDNSService.get_instance()
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LOG.debug("External DNS driver loaded: %s",
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cfg.CONF.external_dns_driver)
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return self._dns_driver
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except ImportError:
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LOG.exception("ImportError exception occurred while loading "
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"the external DNS service driver")
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raise dns_exc.ExternalDNSDriverNotFound(
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driver=cfg.CONF.external_dns_driver)
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@staticmethod
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@resource_extend.extends([l3_apidef.FLOATINGIPS])
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def _extend_floatingip_dict_dns(floatingip_res, floatingip_db):
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floatingip_res['dns_domain'] = ''
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floatingip_res['dns_name'] = ''
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if floatingip_db.dns:
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floatingip_res['dns_domain'] = floatingip_db.dns['dns_domain']
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floatingip_res['dns_name'] = floatingip_db.dns['dns_name']
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return floatingip_res
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def _process_dns_floatingip_create_precommit(self, context,
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floatingip_data, req_data):
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# expects to be called within a plugin's session
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dns_domain = req_data.get(dns_apidef.DNSDOMAIN)
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if not validators.is_attr_set(dns_domain):
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return
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if not self.dns_driver:
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return
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dns_name = req_data[dns_apidef.DNSNAME]
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self._validate_floatingip_dns(dns_name, dns_domain)
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current_dns_name, current_dns_domain = (
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self._get_requested_state_for_external_dns_service_create(
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context, floatingip_data, req_data))
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dns_actions_data = None
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if current_dns_name and current_dns_domain:
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fip_obj.FloatingIPDNS(
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context,
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floatingip_id=floatingip_data['id'],
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dns_name=req_data[dns_apidef.DNSNAME],
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dns_domain=req_data[dns_apidef.DNSDOMAIN],
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published_dns_name=current_dns_name,
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published_dns_domain=current_dns_domain).create()
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dns_actions_data = DNSActionsData(
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current_dns_name=current_dns_name,
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current_dns_domain=current_dns_domain)
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floatingip_data['dns_name'] = dns_name
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floatingip_data['dns_domain'] = dns_domain
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return dns_actions_data
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def _process_dns_floatingip_create_postcommit(self, context,
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floatingip_data,
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dns_actions_data):
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if not dns_actions_data:
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return
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self._add_ips_to_external_dns_service(
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context, dns_actions_data.current_dns_domain,
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dns_actions_data.current_dns_name,
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[floatingip_data['floating_ip_address']])
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def _process_dns_floatingip_update_precommit(self, context,
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floatingip_data):
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# expects to be called within a plugin's session
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if not extensions.is_extension_supported(
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self._core_plugin, dns_apidef.ALIAS):
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return
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if not self.dns_driver:
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return
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dns_data_db = fip_obj.FloatingIPDNS.get_object(
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context, floatingip_id=floatingip_data['id'])
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if dns_data_db and dns_data_db['dns_name']:
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# dns_name and dns_domain assigned for floating ip. It doesn't
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# matter whether they are defined for internal port
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return
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current_dns_name, current_dns_domain = (
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self._get_requested_state_for_external_dns_service_update(
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context, floatingip_data))
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if dns_data_db:
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if (dns_data_db['published_dns_name'] != current_dns_name or
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dns_data_db['published_dns_domain'] != current_dns_domain):
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dns_actions_data = DNSActionsData(
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previous_dns_name=dns_data_db['published_dns_name'],
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previous_dns_domain=dns_data_db['published_dns_domain'])
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if current_dns_name and current_dns_domain:
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dns_data_db['published_dns_name'] = current_dns_name
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dns_data_db['published_dns_domain'] = current_dns_domain
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dns_actions_data.current_dns_name = current_dns_name
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dns_actions_data.current_dns_domain = current_dns_domain
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else:
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dns_data_db.delete()
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return dns_actions_data
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else:
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return
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if current_dns_name and current_dns_domain:
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fip_obj.FloatingIPDNS(
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context,
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floatingip_id=floatingip_data['id'],
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dns_name='',
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dns_domain='',
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published_dns_name=current_dns_name,
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published_dns_domain=current_dns_domain).create()
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return DNSActionsData(current_dns_name=current_dns_name,
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current_dns_domain=current_dns_domain)
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def _process_dns_floatingip_update_postcommit(self, context,
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floatingip_data,
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dns_actions_data):
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if not dns_actions_data:
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return
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if dns_actions_data.previous_dns_name:
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self._delete_floatingip_from_external_dns_service(
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context, dns_actions_data.previous_dns_domain,
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dns_actions_data.previous_dns_name,
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[floatingip_data['floating_ip_address']])
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if dns_actions_data.current_dns_name:
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self._add_ips_to_external_dns_service(
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context, dns_actions_data.current_dns_domain,
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dns_actions_data.current_dns_name,
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[floatingip_data['floating_ip_address']])
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def _process_dns_floatingip_delete(self, context, floatingip_data):
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if not extensions.is_extension_supported(
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self._core_plugin, dns_apidef.ALIAS):
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return
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dns_data_db = fip_obj.FloatingIPDNS.get_object(
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context, floatingip_id=floatingip_data['id'])
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if dns_data_db:
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self._delete_floatingip_from_external_dns_service(
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context, dns_data_db['published_dns_domain'],
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dns_data_db['published_dns_name'],
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[floatingip_data['floating_ip_address']])
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def _validate_floatingip_dns(self, dns_name, dns_domain):
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if dns_domain and not dns_name:
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msg = _("dns_domain cannot be specified without a dns_name")
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raise n_exc.BadRequest(resource='floatingip', msg=msg)
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if dns_name and not dns_domain:
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msg = _("dns_name cannot be specified without a dns_domain")
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raise n_exc.BadRequest(resource='floatingip', msg=msg)
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def _get_internal_port_dns_data(self, context, floatingip_data):
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port_dns = port_obj.PortDNS.get_object(
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context, port_id=floatingip_data['port_id'])
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if not (port_dns and port_dns['dns_name']):
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return None, None
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net_dns = network.NetworkDNSDomain.get_net_dns_from_port(
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context=context, port_id=floatingip_data['port_id'])
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if not net_dns:
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return port_dns['dns_name'], None
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return port_dns['dns_name'], net_dns['dns_domain']
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def _delete_floatingip_from_external_dns_service(self, context, dns_domain,
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dns_name, records):
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ips = [str(r) for r in records]
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try:
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self.dns_driver.delete_record_set(context, dns_domain, dns_name,
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ips)
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except (dns_exc.DNSDomainNotFound, dns_exc.DuplicateRecordSet) as e:
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LOG.exception("Error deleting Floating IP data from external "
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"DNS service. Name: '%(name)s'. Domain: "
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"'%(domain)s'. IP addresses '%(ips)s'. DNS "
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"service driver message '%(message)s'",
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{"name": dns_name,
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"domain": dns_domain,
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"message": e.msg,
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"ips": ', '.join(ips)})
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def _get_requested_state_for_external_dns_service_create(self, context,
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floatingip_data,
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req_data):
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fip_dns_name = req_data[dns_apidef.DNSNAME]
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if fip_dns_name:
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return fip_dns_name, req_data[dns_apidef.DNSDOMAIN]
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if floatingip_data['port_id']:
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return self._get_internal_port_dns_data(context, floatingip_data)
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return None, None
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def _get_requested_state_for_external_dns_service_update(self, context,
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floatingip_data):
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if floatingip_data['port_id']:
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return self._get_internal_port_dns_data(context, floatingip_data)
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return None, None
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def _add_ips_to_external_dns_service(self, context, dns_domain, dns_name,
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records):
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ips = [str(r) for r in records]
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try:
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self.dns_driver.create_record_set(context, dns_domain, dns_name,
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ips)
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except (dns_exc.DNSDomainNotFound, dns_exc.DuplicateRecordSet) as e:
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LOG.exception("Error publishing floating IP data in external "
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"DNS service. Name: '%(name)s'. Domain: "
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"'%(domain)s'. DNS service driver message "
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"'%(message)s'",
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{"name": dns_name,
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"domain": dns_domain,
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"message": e.msg})
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