A set of Neutron drivers for the VMware NSX.
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# Copyright (c) 2018 VMware, Inc.
# 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.definitions import dns
from neutron_lib.api import validators
from neutron_lib.api.validators import availability_zone as az_validator
from neutron_lib.callbacks import events
from neutron_lib.callbacks import registry
from neutron_lib.callbacks import resources
from neutron_lib import context as n_context
from neutron_lib.exceptions import dns as dns_exc
from neutron_lib.objects import registry as obj_reg
from neutron_lib.plugins import directory
from oslo_config import cfg
from oslo_log import log as logging
from neutron.db.models import dns as dns_model
from neutron.db import models_v2
from neutron.services.externaldns import driver
from vmware_nsx.common import driver_api
from vmware_nsx.plugins.nsx_p import availability_zones as nsxp_az
from vmware_nsx.plugins.nsx_v3 import availability_zones as nsx_az
LOG = logging.getLogger(__name__)
DNS_DOMAIN_DEFAULT = 'openstacklocal.'
def _dotted_domain(dns_domain):
if dns_domain.endswith('.'):
return dns_domain
return '%s.' % dns_domain
# TODO(asarfaty) use dns-domain/nameserver from network az instead of global
class DNSExtensionDriver(driver_api.ExtensionDriver):
_supported_extension_alias = dns.ALIAS
@property
def extension_alias(self):
return self._supported_extension_alias
def process_create_network(self, plugin_context, request_data, db_data):
dns_domain = request_data.get(dns.DNSDOMAIN)
if not validators.is_attr_set(dns_domain):
return
if dns_domain:
obj_reg.new_instance('NetworkDNSDomain', plugin_context,
network_id=db_data['id'],
dns_domain=dns_domain).create()
db_data[dns.DNSDOMAIN] = dns_domain
def process_update_network(self, plugin_context, request_data, db_data):
new_value = request_data.get(dns.DNSDOMAIN)
if not validators.is_attr_set(new_value):
return
current_dns_domain = db_data.get(dns.DNSDOMAIN)
if current_dns_domain == new_value:
return
net_id = db_data['id']
if current_dns_domain:
net_dns_domain = obj_reg.load_class('NetworkDNSDomain').get_object(
plugin_context,
network_id=net_id)
if new_value:
net_dns_domain['dns_domain'] = new_value
db_data[dns.DNSDOMAIN] = new_value
net_dns_domain.update()
else:
net_dns_domain.delete()
db_data[dns.DNSDOMAIN] = ''
elif new_value:
obj_reg.new_instance('NetworkDNSDomain', plugin_context,
network_id=net_id,
dns_domain=new_value).create()
db_data[dns.DNSDOMAIN] = new_value
def process_create_port(self, plugin_context, request_data, db_data):
if not (request_data.get(dns.DNSNAME) or
request_data.get(dns.DNSDOMAIN)):
return
dns_name, is_dns_domain_default = self._get_request_dns_name(
request_data, db_data['network_id'], plugin_context)
if is_dns_domain_default:
return
network = self._get_network(plugin_context, db_data['network_id'])
self._create_port_dns_record(plugin_context, request_data, db_data,
network, dns_name)
def _create_port_dns_record(self, plugin_context, request_data, db_data,
network, dns_name):
external_dns_domain = (request_data.get(dns.DNSDOMAIN) or
network.get(dns.DNSDOMAIN))
current_dns_name, current_dns_domain = (
self._calculate_current_dns_name_and_domain(
dns_name, external_dns_domain,
self.external_dns_not_needed(plugin_context, network)))
dns_data_obj = obj_reg.new_instance(
'PortDNS',
plugin_context,
port_id=db_data['id'],
current_dns_name=current_dns_name,
current_dns_domain=current_dns_domain,
previous_dns_name='',
previous_dns_domain='',
dns_name=dns_name,
dns_domain=request_data.get(dns.DNSDOMAIN, ''))
dns_data_obj.create()
return dns_data_obj
def _calculate_current_dns_name_and_domain(self, dns_name,
external_dns_domain,
no_external_dns_service):
# When creating a new PortDNS object, the current_dns_name and
# current_dns_domain fields hold the data that the integration driver
# will send to the external DNS service. They are set to non-blank
# values only if all the following conditions are met:
# 1) There is an external DNS integration driver configured
# 2) The user request contains a valid non-blank value for the port's
# dns_name
# 3) The user request contains a valid non-blank value for the port's
# dns_domain or the port's network has a non-blank value in its
# dns_domain attribute
are_both_dns_attributes_set = dns_name and external_dns_domain
if no_external_dns_service or not are_both_dns_attributes_set:
return '', ''
return dns_name, external_dns_domain
def _update_dns_db(self, dns_name, dns_domain, db_data,
plugin_context, has_fixed_ips):
dns_data_db = obj_reg.load_class('PortDNS').get_object(
plugin_context,
port_id=db_data['id'])
if dns_data_db:
is_dns_name_changed = (dns_name is not None and
dns_data_db['current_dns_name'] != dns_name)
if is_dns_name_changed or (has_fixed_ips and
dns_data_db['current_dns_name']):
dns_data_db['previous_dns_name'] = (
dns_data_db['current_dns_name'])
dns_data_db['previous_dns_domain'] = (
dns_data_db['current_dns_domain'])
if is_dns_name_changed:
dns_data_db[dns.DNSNAME] = dns_name
dns_data_db['current_dns_name'] = dns_name
if dns_name:
dns_data_db['current_dns_domain'] = dns_domain
else:
dns_data_db['current_dns_domain'] = ''
dns_data_db.update()
return dns_data_db
if dns_name:
dns_data_db = obj_reg.new_instance(
'PortDNS', plugin_context, port_id=db_data['id'],
current_dns_name=dns_name, current_dns_domain=dns_domain,
previous_dns_name='', previous_dns_domain='',
dns_name=dns_name)
dns_data_db.create()
return dns_data_db
def process_update_port(self, plugin_context, request_data, db_data):
dns_name = request_data.get(dns.DNSNAME)
has_fixed_ips = 'fixed_ips' in request_data
if dns_name is None and not has_fixed_ips:
return
if dns_name is not None:
dns_name, is_dns_domain_default = self._get_request_dns_name(
request_data, db_data['network_id'], plugin_context)
if is_dns_domain_default:
self._extend_port_dict(db_data, db_data, None, plugin_context)
return
network = self._get_network(plugin_context, db_data['network_id'])
dns_domain = network[dns.DNSDOMAIN]
dns_data_db = None
if not dns_domain or self.external_dns_not_needed(plugin_context,
network):
# No need to update external DNS service. Only process the port's
# dns_name attribute if necessary
if dns_name is not None:
dns_data_db = self._process_only_dns_name_update(
plugin_context, db_data, dns_name)
else:
dns_data_db = self._update_dns_db(dns_name, dns_domain, db_data,
plugin_context, has_fixed_ips)
self._extend_port_dict(db_data, db_data, dns_data_db, plugin_context)
def _process_only_dns_name_update(self, plugin_context, db_data, dns_name):
dns_data_db = obj_reg.load_class('PortDNS').get_object(
plugin_context,
port_id=db_data['id'])
if dns_data_db:
dns_data_db['dns_name'] = dns_name
dns_data_db.update()
return dns_data_db
if dns_name:
dns_data_db = obj_reg.new_instance(
'PortDNS', plugin_context, port_id=db_data['id'],
current_dns_name='', current_dns_domain='',
previous_dns_name='', previous_dns_domain='',
dns_name=dns_name)
dns_data_db.create()
return dns_data_db
def external_dns_not_needed(self, context, network):
"""Decide if ports in network need to be sent to the DNS service.
:param context: plugin request context
:param network: network dictionary
:return: True or False
"""
pass
def extend_network_dict(self, session, db_data, response_data):
response_data[dns.DNSDOMAIN] = ''
if db_data.dns_domain:
response_data[dns.DNSDOMAIN] = db_data.dns_domain[dns.DNSDOMAIN]
return response_data
def _get_dns_domain(self, network_id, context=None):
if not cfg.CONF.dns_domain:
return ''
return _dotted_domain(cfg.CONF.dns_domain)
def _get_request_dns_name(self, port, network_id, context):
dns_domain = self._get_dns_domain(network_id, context)
if ((dns_domain and dns_domain != DNS_DOMAIN_DEFAULT)):
return (port.get(dns.DNSNAME, ''), False)
return ('', True)
def _get_request_dns_name_and_domain_name(self, dns_data_db,
network_id, context):
dns_domain = self._get_dns_domain(network_id, context)
dns_name = ''
if ((dns_domain and dns_domain != DNS_DOMAIN_DEFAULT)):
if dns_data_db:
dns_name = dns_data_db.dns_name
return dns_name, dns_domain
def _get_dns_names_for_port(self, ips, dns_data_db, network_id, context):
dns_assignment = []
dns_name, dns_domain = self._get_request_dns_name_and_domain_name(
dns_data_db, network_id, context)
for ip in ips:
if dns_name:
hostname = dns_name
fqdn = dns_name
if not dns_name.endswith('.'):
fqdn = '%s.%s' % (dns_name, dns_domain)
else:
hostname = 'host-%s' % ip['ip_address'].replace(
'.', '-').replace(':', '-')
fqdn = hostname
if dns_domain:
fqdn = '%s.%s' % (hostname, dns_domain)
dns_assignment.append({'ip_address': ip['ip_address'],
'hostname': hostname,
'fqdn': fqdn})
return dns_assignment
def _get_dns_name_for_port_get(self, port, dns_data_db, context):
if port['fixed_ips']:
return self._get_dns_names_for_port(
port['fixed_ips'], dns_data_db,
port['network_id'], context)
return []
def _extend_port_dict(self, db_data, response_data,
dns_data_db, context=None):
if not dns_data_db:
response_data[dns.DNSNAME] = ''
else:
response_data[dns.DNSNAME] = dns_data_db[dns.DNSNAME]
response_data['dns_assignment'] = self._get_dns_name_for_port_get(
db_data, dns_data_db, context)
return response_data
def extend_port_dict(self, session, db_data, response_data):
dns_data_db = db_data.dns
return self._extend_port_dict(db_data, response_data, dns_data_db)
def _get_network(self, context, network_id):
plugin = directory.get_plugin()
return plugin.get_network(context, network_id)
class DNSExtensionDriverNSXv(DNSExtensionDriver):
def initialize(self):
LOG.info("DNSExtensionDriverNSXv initialization complete")
def external_dns_not_needed(self, context, network):
dns_driver = _get_dns_driver()
if not dns_driver:
return True
provider_type = network.get('provider:network_type')
if not provider_type:
return True
if network['router:external']:
return True
return False
class DNSExtensionDriverNSXv3(DNSExtensionDriver):
def initialize(self):
self._availability_zones = nsx_az.NsxV3AvailabilityZones()
LOG.info("DNSExtensionDriverNSXv3 initialization complete")
self.config_dns_domain = cfg.CONF.nsx_v3.dns_domain
def _get_db_net_dns(self, session, network_id):
db_entry = session.query(dns_model.NetworkDNSDomain).filter_by(
network_id=network_id).first()
if db_entry:
return db_entry.dns_domain
def _get_db_net_az_hints(self, session, network_id):
# TODO(asarfaty): Consider caching networks azs in get_ports
# and use it here
db_entry = session.query(models_v2.Network).filter_by(
id=network_id).first()
if db_entry:
return db_entry.availability_zone_hints
def _get_network_and_az_dns_domain(self, network_id, context):
if not context:
context = n_context.get_admin_context()
# Getting only the relevant network attributes directly from the DB
net_domain = self._get_db_net_dns(context.session, network_id)
# Getting the az of the network is relevant only if any of the azs
# have dns_domain and if there is no net_domain
az_domain = None
if not net_domain and self._availability_zones.non_default_dns_domain:
az = None
net_hints = self._get_db_net_az_hints(context.session, network_id)
if net_hints:
hints = az_validator.convert_az_string_to_list(net_hints)
if hints:
az_name = hints[0]
az = self._availability_zones.get_availability_zone(
az_name)
if not az:
# Get the default availability zone
az = self._availability_zones.get_default_availability_zone()
az_domain = az.dns_domain
return net_domain, az_domain
def _get_dns_domain(self, network_id, context=None):
net_domain, az_domain = self._get_network_and_az_dns_domain(
network_id, context)
# first try to use the dns_domain configured on the network
if net_domain:
return _dotted_domain(net_domain)
# try to use the dns-domain from the specific availability zone
# of this network
if (az_domain and
_dotted_domain(az_domain) !=
_dotted_domain(DNS_DOMAIN_DEFAULT)):
dns_domain = az_domain
# Global nsx_v3 dns domain
elif (self.config_dns_domain and
(_dotted_domain(self.config_dns_domain) !=
_dotted_domain(DNS_DOMAIN_DEFAULT))):
dns_domain = self.config_dns_domain
# Global neutron dns domain
elif cfg.CONF.dns_domain:
dns_domain = cfg.CONF.dns_domain
else:
return ''
return _dotted_domain(dns_domain)
def external_dns_not_needed(self, context, network):
dns_driver = _get_dns_driver()
if not dns_driver:
return True
provider_type = network.get('provider:network_type')
if not provider_type:
return True
if network['router:external']:
return True
return False
class DNSExtensionDriverNSXp(DNSExtensionDriverNSXv3):
def initialize(self):
self._availability_zones = nsxp_az.NsxPAvailabilityZones()
LOG.info("DNSExtensionDriverNSXp initialization complete")
self.config_dns_domain = cfg.CONF.nsx_p.dns_domain
class DNSExtensionDriverDVS(DNSExtensionDriver):
def initialize(self):
LOG.info("DNSExtensionDriverDVS initialization complete")
def external_dns_not_needed(self, context, network):
dns_driver = _get_dns_driver()
if not dns_driver:
return True
if network['router:external']:
return True
return False
DNS_DRIVER = None
def _get_dns_driver():
global DNS_DRIVER
if DNS_DRIVER:
return DNS_DRIVER
if not cfg.CONF.external_dns_driver:
return
try:
DNS_DRIVER = driver.ExternalDNSService.get_instance()
LOG.debug("External DNS driver loaded: %s",
cfg.CONF.external_dns_driver)
return DNS_DRIVER
except ImportError:
LOG.exception("ImportError exception occurred while loading "
"the external DNS service driver")
raise dns_exc.ExternalDNSDriverNotFound(
driver=cfg.CONF.external_dns_driver)
def _send_data_to_external_dns_service(context, dns_driver, dns_domain,
dns_name, records):
try:
dns_driver.create_record_set(context, dns_domain, dns_name, records)
except (dns_exc.DNSDomainNotFound, dns_exc.DuplicateRecordSet) as e:
LOG.exception("Error publishing port 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})
def _remove_data_from_external_dns_service(context, dns_driver, dns_domain,
dns_name, records):
try:
dns_driver.delete_record_set(context, dns_domain, dns_name, records)
except (dns_exc.DNSDomainNotFound, dns_exc.DuplicateRecordSet) as e:
LOG.exception("Error deleting port 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 _create_port_in_external_dns_service(resource, event, trigger, **kwargs):
dns_driver = _get_dns_driver()
if not dns_driver:
return
context = kwargs['context']
port = kwargs['port']
dns_data_db = obj_reg.load_class('PortDNS').get_object(
context, port_id=port['id'])
if not (dns_data_db and dns_data_db['current_dns_name']):
return
records = [ip['ip_address'] for ip in port['fixed_ips']]
_send_data_to_external_dns_service(context, dns_driver,
dns_data_db['current_dns_domain'],
dns_data_db['current_dns_name'],
records)
def _update_port_in_external_dns_service(resource, event, trigger, **kwargs):
dns_driver = _get_dns_driver()
if not dns_driver:
return
context = kwargs['context']
updated_port = kwargs['port']
original_port = kwargs.get('original_port')
if not original_port:
return
original_ips = [ip['ip_address'] for ip in original_port['fixed_ips']]
updated_ips = [ip['ip_address'] for ip in updated_port['fixed_ips']]
is_dns_name_changed = (updated_port[dns.DNSNAME] !=
original_port[dns.DNSNAME])
is_dns_domain_changed = (dns.DNSDOMAIN in updated_port and
updated_port[dns.DNSDOMAIN] !=
original_port[dns.DNSDOMAIN])
ips_changed = set(original_ips) != set(updated_ips)
if not any((is_dns_name_changed, is_dns_domain_changed, ips_changed)):
return
dns_data_db = obj_reg.load_class('PortDNS').get_object(
context, port_id=updated_port['id'])
if not (dns_data_db and
(dns_data_db['previous_dns_name'] or
dns_data_db['current_dns_name'])):
return
if dns_data_db['previous_dns_name']:
_remove_data_from_external_dns_service(
context, dns_driver, dns_data_db['previous_dns_domain'],
dns_data_db['previous_dns_name'], original_ips)
if dns_data_db['current_dns_name']:
_send_data_to_external_dns_service(context, dns_driver,
dns_data_db['current_dns_domain'],
dns_data_db['current_dns_name'],
updated_ips)
def _delete_port_in_external_dns_service(resource, event,
trigger, payload=None):
dns_driver = _get_dns_driver()
if not dns_driver:
return
context = payload.context
port_id = payload.resource_id
dns_data_db = obj_reg.load_class('PortDNS').get_object(
context, port_id=port_id)
if not dns_data_db:
return
if dns_data_db['current_dns_name']:
ip_allocations = obj_reg.load_class('IPAllocation').get_objects(
context, port_id=port_id)
records = [str(alloc['ip_address']) for alloc in ip_allocations]
_remove_data_from_external_dns_service(
context, dns_driver, dns_data_db['current_dns_domain'],
dns_data_db['current_dns_name'], records)
registry.subscribe(
_create_port_in_external_dns_service, resources.PORT, events.AFTER_CREATE)
registry.subscribe(
_update_port_in_external_dns_service, resources.PORT, events.AFTER_UPDATE)
registry.subscribe(
_delete_port_in_external_dns_service, resources.PORT, events.BEFORE_DELETE)