Source code for designate.scheduler.filters.in_doubt_default_pool_filter
# Copyright 2017 SAP SE
#
# 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 designate.scheduler.filters import base
from designate import objects
cfg.CONF.register_opts([
cfg.StrOpt('default_pool_id',
default='794ccc2c-d751-44fe-b57f-8894c9f5c842',
help="The name of the default pool"),
], group='service:central')
[docs]class InDoubtDefaultPoolFilter(base.Filter):
"""If the previous filter(s) didn't make a clear selection of one pool
and if the default pool is in the set of multiple pools, this filter will
select the default pool.
This filter will pass through the pool list, if there are one or
less pools available to schedule to, or if the default pool is
not in the set of multiple pools.
.. note::
This should be used as one of the last filters.
"""
name = 'in_doubt_default_pool'
"""Name to enable in the ``[designate:central:scheduler].filters`` option
list
"""
def filter(self, context, pools, zone):
if len(pools) > 1:
default_pool_id = cfg.CONF['service:central'].default_pool_id
try:
default_pool = self.storage.get_pool(context, default_pool_id)
except Exception:
return pools
if default_pool in pools:
pools = objects.PoolList()
pools.append(default_pool)
return pools