122 lines
3.8 KiB
Python
122 lines
3.8 KiB
Python
# Copyright 2014 eBay Inc.
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#
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# Author: Ron Rickard <rrickard@ebay.com>
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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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import random
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import six
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from oslo_log import log as logging
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from oslo_utils import strutils
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from designate import exceptions
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from designate import utils
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from designate.backend import base
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LOG = logging.getLogger(__name__)
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DEFAULT_MASTER_PORT = 5354
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class Bind9Backend(base.Backend):
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__plugin_name__ = 'bind9'
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__backend_status__ = 'integrated'
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def __init__(self, target):
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super(Bind9Backend, self).__init__(target)
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self.host = self.options.get('host', '127.0.0.1')
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self.port = int(self.options.get('port', 53))
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self.rndc_host = self.options.get('rndc_host', '127.0.0.1')
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self.rndc_port = int(self.options.get('rndc_port', 953))
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self.rndc_config_file = self.options.get('rndc_config_file')
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self.rndc_key_file = self.options.get('rndc_key_file')
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# Removes zone files when a zone is deleted.
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# This option will take effect on bind>=9.10.0.
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self.clean_zonefile = strutils.bool_from_string(
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self.options.get('clean_zonefile', 'false'))
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def create_zone(self, context, zone):
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LOG.debug('Create Zone')
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masters = []
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for master in self.masters:
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host = master['host']
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port = master['port']
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masters.append('%s port %s' % (host, port))
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# Ensure different MiniDNS instances are targeted for AXFRs
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random.shuffle(masters)
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rndc_op = [
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'addzone',
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'%s { type slave; masters { %s;}; file "slave.%s%s"; };' %
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(zone['name'].rstrip('.'), '; '.join(masters), zone['name'],
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zone['id']),
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]
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try:
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self._execute_rndc(rndc_op)
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except exceptions.Backend as e:
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# If create fails because the zone exists, don't reraise
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if "already exists" not in six.text_type(e):
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raise
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self.mdns_api.notify_zone_changed(
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context, zone, self.host, self.port, self.timeout,
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self.retry_interval, self.max_retries, self.delay)
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def delete_zone(self, context, zone):
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LOG.debug('Delete Zone')
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rndc_op = [
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'delzone',
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'%s' % zone['name'].rstrip('.'),
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]
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if self.clean_zonefile:
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rndc_op.insert(1, '-clean')
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try:
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self._execute_rndc(rndc_op)
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except exceptions.Backend as e:
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# If zone is already deleted, don't reraise
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if "not found" not in six.text_type(e):
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raise
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def _rndc_base(self):
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rndc_call = [
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'rndc',
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'-s', self.rndc_host,
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'-p', str(self.rndc_port),
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]
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if self.rndc_config_file:
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rndc_call.extend(
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['-c', self.rndc_config_file])
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if self.rndc_key_file:
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rndc_call.extend(
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['-k', self.rndc_key_file])
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return rndc_call
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def _execute_rndc(self, rndc_op):
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try:
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rndc_call = self._rndc_base()
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rndc_call.extend(rndc_op)
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LOG.debug('Executing RNDC call: %s' % " ".join(rndc_call))
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utils.execute(*rndc_call)
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except utils.processutils.ProcessExecutionError as e:
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LOG.debug('RNDC call failure: %s' % e)
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raise exceptions.Backend(e)
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