Source code for designate.scheduler.filters.random_filter

# Copyright 2016 Hewlett-Packard Development Company, L.P.
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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#      http://www.apache.org/licenses/LICENSE-2.0
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import random

from oslo_log import log as logging

from designate.scheduler.filters import base
from designate.objects import PoolList

LOG = logging.getLogger(__name__)


[docs]class RandomFilter(base.Filter): """Randomly chooses one of the input pools if there are multiple ones supplied. .. note:: This should be used as one of the last filters, as it reduces the supplied pool list to one. """ name = 'random' """Name to enable in the ``[designate:central:scheduler].filters`` option list """ def filter(self, context, pools, zone): if pools: new_pool_list = PoolList() new_pool_list.append(random.choice(pools)) return new_pool_list return pools