1ff8469ef7
The Oslo libraries have moved all of their code out of the 'oslo' namespace package into per-library packages. The namespace package was retained during kilo for backwards compatibility, but will be removed by the liberty-2 milestone. This change removes the use of the namespace package, replacing it with the new package names. The patches in the libraries will be put on hold until application patches have landed, or L2, whichever comes first. At that point, new versions of the libraries without namespace packages will be released as a major version update. Please merge this patch, or an equivalent, before L2 to avoid problems with those library releases. Blueprint: remove-namespace-packages https://blueprints.launchpad.net/oslo-incubator/+spec/remove-namespace-packages Change-Id: Iae62b48993eef3b31420f8cc245a55f5e303c4fc
147 lines
5.1 KiB
Python
147 lines
5.1 KiB
Python
# Copyright 2014 Rackspace Inc.
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#
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# Author: Tim Simmons <tim.simmons@rackspace.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 os
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import dns
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import dns.resolver
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from oslo_concurrency import lockutils
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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 designate.backend.agent_backend import base
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from designate import exceptions
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from designate import utils
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from designate.i18n import _LI
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LOG = logging.getLogger(__name__)
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CFG_GROUP = 'backend:agent:bind9'
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class Bind9Backend(base.AgentBackend):
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__plugin_name__ = 'bind9'
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@classmethod
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def get_cfg_opts(cls):
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group = cfg.OptGroup(
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name='backend:agent:bind9', title="Configuration for bind9 backend"
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)
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opts = [
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cfg.StrOpt('rndc-host', default='127.0.0.1', help='RNDC Host'),
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cfg.IntOpt('rndc-port', default=953, help='RNDC Port'),
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cfg.StrOpt('rndc-config-file', default=None,
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help='RNDC Config File'),
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cfg.StrOpt('rndc-key-file', default=None, help='RNDC Key File'),
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cfg.StrOpt('zone-file-path', default='$state_path/zones',
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help='Path where zone files are stored'),
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cfg.StrOpt('query-destination', default='127.0.0.1',
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help='Host to query when finding domains')
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]
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return [(group, opts)]
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def start(self):
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LOG.info(_LI("Started bind9 backend"))
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def find_domain_serial(self, domain_name):
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LOG.debug("Finding %s" % domain_name)
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resolver = dns.resolver.Resolver()
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resolver.nameservers = [cfg.CONF[CFG_GROUP].query_destination]
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try:
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rdata = resolver.query(domain_name, 'SOA')[0]
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except Exception:
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return None
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return rdata.serial
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def create_domain(self, domain):
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LOG.debug("Creating %s" % domain.origin.to_text())
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self._sync_domain(domain, new_domain_flag=True)
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def update_domain(self, domain):
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LOG.debug("Updating %s" % domain.origin.to_text())
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self._sync_domain(domain)
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def delete_domain(self, domain_name):
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LOG.debug('Delete Domain: %s' % domain_name)
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rndc_op = 'delzone'
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# RNDC doesn't like the trailing dot on the domain name
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rndc_call = self._rndc_base() + [rndc_op, domain_name.rstrip('.')]
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utils.execute(*rndc_call)
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def _rndc_base(self):
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rndc_call = [
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'rndc',
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'-s', cfg.CONF[CFG_GROUP].rndc_host,
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'-p', str(cfg.CONF[CFG_GROUP].rndc_port),
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]
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if cfg.CONF[CFG_GROUP].rndc_config_file:
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rndc_call.extend(['-c',
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cfg.CONF[CFG_GROUP].rndc_config_file])
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if cfg.CONF[CFG_GROUP].rndc_key_file:
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rndc_call.extend(['-k',
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cfg.CONF[CFG_GROUP].rndc_key_file])
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return rndc_call
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def _sync_domain(self, domain, new_domain_flag=False):
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"""Sync a single domain's zone file and reload bind config"""
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# NOTE: Different versions of BIND9 behave differently with a trailing
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# dot, so we're just going to take it off.
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domain_name = domain.origin.to_text().rstrip('.')
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# NOTE: Only one thread should be working with the Zonefile at a given
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# time. The sleep(1) below introduces a not insignificant risk
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# of more than 1 thread working with a zonefile at a given time.
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with lockutils.lock('bind9-%s' % domain_name):
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LOG.debug('Synchronising Domain: %s' % domain_name)
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zone_path = cfg.CONF[CFG_GROUP].zone_file_path
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output_path = os.path.join(zone_path,
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'%s.zone' % domain_name)
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domain.to_file(output_path, relativize=False)
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rndc_call = self._rndc_base()
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if new_domain_flag:
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rndc_op = [
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'addzone',
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'%s { type master; file "%s"; };' % (domain_name,
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output_path),
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]
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rndc_call.extend(rndc_op)
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else:
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rndc_op = 'reload'
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rndc_call.extend([rndc_op])
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rndc_call.extend([domain_name])
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LOG.debug('Calling RNDC with: %s' % " ".join(rndc_call))
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self._execute_rndc(rndc_call)
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def _execute_rndc(self, rndc_call):
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try:
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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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