Source code for designate.mdns.rpcapi

# Copyright (c) 2014 Rackspace Hosting
# 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 oslo_config import cfg
from oslo_log import log as logging
import oslo_messaging as messaging

from designate.loggingutils import rpc_logging
from designate import rpc

CONF = cfg.CONF
LOG = logging.getLogger(__name__)

MDNS_API = None


[docs]def reset(): global MDNS_API MDNS_API = None
[docs]@rpc_logging(LOG, 'mdns') class MdnsAPI(object): """ Client side of the mdns RPC API. Notify API version history: 1.0 - Added notify_zone_changed and poll_for_serial_number. 1.1 - Added get_serial_number. 2.0 - Changed method signatures XFR API version history: 1.0 - Added perform_zone_xfr. """ RPC_NOTIFY_API_VERSION = '2.0' RPC_XFR_API_VERSION = '1.0' def __init__(self, topic=None): self.topic = topic if topic else cfg.CONF['service:mdns'].topic notify_target = messaging.Target(topic=self.topic, namespace='notify', version=self.RPC_NOTIFY_API_VERSION) self.notify_client = rpc.get_client(notify_target, version_cap='2.0') xfr_target = messaging.Target(topic=self.topic, namespace='xfr', version=self.RPC_XFR_API_VERSION) self.xfr_client = rpc.get_client(xfr_target, version_cap='1.0')
[docs] @classmethod def get_instance(cls): """ The rpc.get_client() which is called upon the API object initialization will cause a assertion error if the designate.rpc.TRANSPORT isn't setup by rpc.init() before. This fixes that by creating the rpcapi when demanded. """ global MDNS_API if not MDNS_API: MDNS_API = cls() return MDNS_API
[docs] def notify_zone_changed(self, context, zone, host, port, timeout, retry_interval, max_retries, delay): if CONF['service:worker'].notify: LOG.debug('Letting worker send NOTIFYs instead') return True LOG.info( "notify_zone_changed: Calling mdns for zone '%(zone)s', " "serial '%(serial)s' to nameserver '%(host)s:%(port)s'", { 'zone': zone.name, 'serial': zone.serial, 'host': host, 'port': port }) # The notify_zone_changed method is a cast rather than a call since the # caller need not wait for the notify to complete. return self.notify_client.cast( context, 'notify_zone_changed', zone=zone, host=host, port=port, timeout=timeout, retry_interval=retry_interval, max_retries=max_retries, delay=delay)
[docs] def poll_for_serial_number(self, context, zone, nameserver, timeout, retry_interval, max_retries, delay): LOG.info( "poll_for_serial_number: Calling mdns for zone '%(zone)s', " "serial '%(serial)s' on nameserver '%(host)s:%(port)s'", { 'zone': zone.name, 'serial': zone.serial, 'host': nameserver.host, 'port': nameserver.port }) # The poll_for_serial_number method is a cast rather than a call since # the caller need not wait for the poll to complete. Mdns informs pool # manager of the return value using update_status return self.notify_client.cast( context, 'poll_for_serial_number', zone=zone, nameserver=nameserver, timeout=timeout, retry_interval=retry_interval, max_retries=max_retries, delay=delay)
[docs] def get_serial_number(self, context, zone, host, port, timeout, retry_interval, max_retries, delay): LOG.info( "get_serial_number: Calling mdns for zone '%(zone)s', serial " "%(serial)s' on nameserver '%(host)s:%(port)s'", { 'zone': zone.name, 'serial': zone.serial, 'host': host, 'port': port }) cctxt = self.notify_client.prepare() return cctxt.call( context, 'get_serial_number', zone=zone, host=host, port=port, timeout=timeout, retry_interval=retry_interval, max_retries=max_retries, delay=delay)
[docs] def perform_zone_xfr(self, context, zone): LOG.info("perform_zone_xfr: Calling mdns for zone %(zone)s", {"zone": zone.name}) return self.xfr_client.cast(context, 'perform_zone_xfr', zone=zone)