143 lines
5.2 KiB
Python
143 lines
5.2 KiB
Python
# Copyright (c) 2014 Rackspace Hosting
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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_config import cfg
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from oslo_log import log as logging
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import oslo_messaging as messaging
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from designate import rpc
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from designate.loggingutils import rpc_logging
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CONF = cfg.CONF
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LOG = logging.getLogger(__name__)
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MDNS_API = None
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def reset():
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global MDNS_API
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MDNS_API = None
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@rpc_logging(LOG, 'mdns')
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class MdnsAPI(object):
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"""
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Client side of the mdns RPC API.
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Notify API version history:
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1.0 - Added notify_zone_changed and poll_for_serial_number.
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1.1 - Added get_serial_number.
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2.0 - Changed method signatures
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XFR API version history:
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1.0 - Added perform_zone_xfr.
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"""
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RPC_NOTIFY_API_VERSION = '2.0'
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RPC_XFR_API_VERSION = '1.0'
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def __init__(self, topic=None):
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topic = topic if topic else cfg.CONF['service:mdns'].mdns_topic
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notify_target = messaging.Target(topic=topic,
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namespace='notify',
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version=self.RPC_NOTIFY_API_VERSION)
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self.notify_client = rpc.get_client(notify_target, version_cap='2.0')
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xfr_target = messaging.Target(topic=topic,
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namespace='xfr',
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version=self.RPC_XFR_API_VERSION)
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self.xfr_client = rpc.get_client(xfr_target, version_cap='1.0')
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@classmethod
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def get_instance(cls):
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"""
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The rpc.get_client() which is called upon the API object initialization
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will cause a assertion error if the designate.rpc.TRANSPORT isn't setup
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by rpc.init() before.
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This fixes that by creating the rpcapi when demanded.
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"""
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global MDNS_API
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if not MDNS_API:
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MDNS_API = cls()
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return MDNS_API
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def notify_zone_changed(self, context, zone, host, port, timeout,
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retry_interval, max_retries, delay):
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if CONF['service:worker'].notify and CONF['service:worker'].enabled:
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LOG.debug('Letting worker send NOTIFYs instead')
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return True
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LOG.info(
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"notify_zone_changed: Calling mdns for zone '%(zone)s', "
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"serial '%(serial)s' to nameserver '%(host)s:%(port)s'",
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{
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'zone': zone.name,
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'serial': zone.serial,
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'host': host,
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'port': port
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})
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# The notify_zone_changed method is a cast rather than a call since the
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# caller need not wait for the notify to complete.
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return self.notify_client.cast(
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context, 'notify_zone_changed', zone=zone,
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host=host, port=port, timeout=timeout,
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retry_interval=retry_interval, max_retries=max_retries,
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delay=delay)
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def poll_for_serial_number(self, context, zone, nameserver, timeout,
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retry_interval, max_retries, delay):
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LOG.info(
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"poll_for_serial_number: Calling mdns for zone '%(zone)s', "
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"serial '%(serial)s' on nameserver '%(host)s:%(port)s'",
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{
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'zone': zone.name,
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'serial': zone.serial,
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'host': nameserver.host,
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'port': nameserver.port
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})
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# The poll_for_serial_number method is a cast rather than a call since
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# the caller need not wait for the poll to complete. Mdns informs pool
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# manager of the return value using update_status
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return self.notify_client.cast(
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context, 'poll_for_serial_number', zone=zone,
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nameserver=nameserver, timeout=timeout,
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retry_interval=retry_interval, max_retries=max_retries,
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delay=delay)
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def get_serial_number(self, context, zone, host, port, timeout,
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retry_interval, max_retries, delay):
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LOG.info(
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"get_serial_number: Calling mdns for zone '%(zone)s', serial "
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"%(serial)s' on nameserver '%(host)s:%(port)s'",
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{
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'zone': zone.name,
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'serial': zone.serial,
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'host': host,
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'port': port
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})
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cctxt = self.notify_client.prepare()
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return cctxt.call(
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context, 'get_serial_number', zone=zone,
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host=host, port=port, timeout=timeout,
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retry_interval=retry_interval, max_retries=max_retries,
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delay=delay)
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def perform_zone_xfr(self, context, zone):
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LOG.info("perform_zone_xfr: Calling mdns for zone %(zone)s",
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{"zone": zone.name})
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return self.xfr_client.cast(context, 'perform_zone_xfr', zone=zone)
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