268 lines
9.1 KiB
Python
268 lines
9.1 KiB
Python
# Copyright 2015 Hewlett-Packard Development Company, L.P.
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#
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# Author: Kiall Mac Innes <kiall@hpe.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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from oslo_log import log as logging
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import oslo_messaging as messaging
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import stevedore.exception
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import yaml
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from designate.backend import base as backend_base
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from designate.central import rpcapi as central_rpcapi
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import designate.conf
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from designate import exceptions
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from designate.manage import base
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from designate import objects
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from designate.objects.adapters import DesignateAdapter
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from designate import policy
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from designate import rpc
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from designate import utils
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CONF = designate.conf.CONF
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LOG = logging.getLogger(__name__)
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class PoolCommands(base.Commands):
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def __init__(self):
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super().__init__()
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self.central_api = None
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self.dry_run = False
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self.skip_verify_drivers = False
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def _setup(self, dry_run=False, skip_verify_drivers=False):
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self.dry_run = dry_run
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self.skip_verify_drivers = skip_verify_drivers
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rpc.init(CONF)
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self.central_api = central_rpcapi.CentralAPI()
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@base.args('--file', help='The path to the file the yaml output should be '
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'written to',
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default='/etc/designate/pools.yaml')
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def generate_file(self, file):
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self._setup()
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try:
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pools = self.central_api.find_pools(self.context)
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data = DesignateAdapter.render('YAML', pools)
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self._write_config_to_file(file, data)
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except messaging.exceptions.MessagingTimeout:
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LOG.critical(
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'No response received from designate-central. '
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'Check it is running, and retry'
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)
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raise SystemExit(1)
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@base.args('--pool_id', help='ID of the pool to be examined',
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default=CONF['service:central'].default_pool_id)
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def show_config(self, pool_id):
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self._setup()
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self.output_message.append('Pool Configuration:')
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self.output_message.append('-------------------')
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try:
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if not utils.is_uuid_like(pool_id):
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self.output_message.append('Not a valid uuid: %s' % pool_id)
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raise SystemExit(1)
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pool = self.central_api.find_pool(self.context, {'id': pool_id})
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self.output_message.append(
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yaml.dump(
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DesignateAdapter.render('YAML', pool),
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default_flow_style=False
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)
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)
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except exceptions.PoolNotFound:
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self.output_message.append('Pool not found')
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raise SystemExit(1)
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except messaging.exceptions.MessagingTimeout:
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LOG.critical(
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'No response received from designate-central. '
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'Check it is running, and retry'
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)
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raise SystemExit(1)
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finally:
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self._print_result()
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@base.args('--file', help='The path to the yaml file describing the pools',
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default='/etc/designate/pools.yaml')
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@base.args(
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'--delete',
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help='Any Pools not listed in the config file will be deleted. '
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' WARNING: This will delete any zones left in this pool',
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action='store_true',
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default=False)
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@base.args(
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'--dry-run',
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help='This will simulate what will happen when you run this command',
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action='store_true',
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default=False)
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@base.args(
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'--skip-verify-drivers',
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help='Don\'t verify the designate backend drivers',
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action='store_true',
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default=False)
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def update(self, file, delete, dry_run=False, skip_verify_drivers=False):
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self._setup(dry_run, skip_verify_drivers)
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try:
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self.output_message.append('Updating Pools Configuration')
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self.output_message.append('****************************')
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pools_data = self._load_config(file)
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if dry_run:
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self.output_message.append('The following changes will occur:')
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self.output_message.append('*********************************')
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for pool_data in pools_data:
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self._create_or_update_pool(pool_data)
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if delete:
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pools = self.central_api.find_pools(self.context)
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pools_in_db = {pool.name for pool in pools}
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pools_in_yaml = {pool_data['name'] for pool_data in pools_data}
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pools_to_delete = pools_in_db - pools_in_yaml
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for pool_name in pools_to_delete:
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self._delete_pool(pool_name)
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except exceptions.InvalidObject as e:
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self.output_message.append(str(e))
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raise SystemExit(1)
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except messaging.exceptions.MessagingTimeout:
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LOG.critical(
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'No response received from designate-central. '
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'Check it is running, and retry'
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)
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raise SystemExit(1)
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finally:
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self._print_result()
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def _create_or_update_pool(self, pool_data):
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try:
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pool = self._get_pool(pool_data)
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self._update_pool(pool_data, pool)
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except exceptions.PoolNotFound:
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self._create_pool(pool_data)
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def _get_pool(self, pool_data):
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if 'id' in pool_data:
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pool_id = pool_data['id']
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if not utils.is_uuid_like(pool_id):
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self.output_message.append('Not a valid uuid: %s' % pool_id)
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raise SystemExit(1)
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pool = self.central_api.get_pool(
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self.context, pool_id
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)
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else:
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pool = self.central_api.find_pool(
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self.context, {'name': pool_data['name']}
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)
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return pool
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def _create_pool(self, pool_data):
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pool = DesignateAdapter.parse('YAML', pool_data, objects.Pool())
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self._validate_pool(pool)
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if self.dry_run:
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self.output_message.append('Create Pool: %s' % pool)
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else:
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LOG.info('Creating new pool: %s', pool)
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self.central_api.create_pool(self.context, pool)
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return pool
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def _update_pool(self, pool_data, pool):
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pool = DesignateAdapter.parse('YAML', pool_data, pool)
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self._validate_pool(pool)
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if self.dry_run:
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self.output_message.append('Update Pool: %s' % pool)
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else:
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pool = self.central_api.update_pool(self.context, pool)
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self._update_zones(pool)
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def _delete_pool(self, pool_name):
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pool = self.central_api.find_pool(
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self.context, criterion={'name': pool_name}
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)
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if self.dry_run:
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self.output_message.append('Delete Pool: %s' % pool_name)
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else:
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LOG.info('Deleting %s', pool_name)
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self.central_api.delete_pool(self.context, pool.id)
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def _update_zones(self, pool):
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LOG.info('Updating zone masters for pool: %s', pool.id)
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policy.init()
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self.context.all_tenants = True
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zones = self.central_api.find_zones(
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self.context, criterion={'pool_id': pool.id}
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)
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for zone in zones:
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zone.masters = objects.ZoneMasterList().from_list(
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self._get_masters_from_pool(pool)
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)
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self.central_api.update_zone(self.context, zone)
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def _validate_pool(self, pool):
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for ns_record in pool.ns_records:
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ns_record.validate()
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if not self.skip_verify_drivers:
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for target in pool.targets:
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try:
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backend_base.Backend.get_driver(target.type)
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except stevedore.exception.NoMatches:
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self.output_message.append(
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'Unable to find designate backend driver type: '
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'%s' % target.type
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)
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if not self.dry_run:
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raise SystemExit(1)
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@staticmethod
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def _get_masters_from_pool(pool):
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masters = []
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for target in pool.targets:
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for master in target.get('masters', []):
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master = {'host': master['host'], 'port': master['port']}
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found = False
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for existing_master in masters:
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if master == existing_master:
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found = True
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if not found:
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masters.append(master)
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return masters
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@staticmethod
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def _load_config(filename):
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with open(filename) as stream:
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return yaml.safe_load(stream)
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@staticmethod
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def _write_config_to_file(filename, data):
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with open(filename, 'w') as stream:
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yaml.dump(data, stream, default_flow_style=False)
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