blob: 494a1fad227b4f732450e6a7acd984dc7a2d5d78 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
# Copyright 2016 Hewlett-Packard Development Company, L.P.
#
# 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.
import random
from oslo_log import log as logging
from designate.scheduler.filters import base
from designate.objects import PoolList
LOG = logging.getLogger(__name__)
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
|
