82 lines
2.6 KiB
Python
82 lines
2.6 KiB
Python
# Copyright 2011 OpenStack LLC.
|
|
# All Rights Reserved.
|
|
#
|
|
# 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.
|
|
"""
|
|
Tests For Least Cost functions.
|
|
"""
|
|
from nova.scheduler import least_cost
|
|
from nova import test
|
|
from nova.tests.scheduler import fake_zone_manager
|
|
|
|
|
|
def offset(hostinfo, options):
|
|
return hostinfo.free_ram_mb + 10000
|
|
|
|
|
|
def scale(hostinfo, options):
|
|
return hostinfo.free_ram_mb * 2
|
|
|
|
|
|
class LeastCostTestCase(test.TestCase):
|
|
def setUp(self):
|
|
super(LeastCostTestCase, self).setUp()
|
|
self.flags(reserved_host_disk_mb=0, reserved_host_memory_mb=0)
|
|
|
|
self.zone_manager = fake_zone_manager.FakeZoneManager()
|
|
|
|
def tearDown(self):
|
|
super(LeastCostTestCase, self).tearDown()
|
|
|
|
def test_weighted_sum_happy_day(self):
|
|
fn_tuples = [(1.0, offset), (1.0, scale)]
|
|
hostinfo_list = self.zone_manager.get_all_host_data(None).items()
|
|
|
|
# host1: free_ram_mb=0
|
|
# host2: free_ram_mb=1536
|
|
# host3: free_ram_mb=3072
|
|
# host4: free_ram_mb=8192
|
|
|
|
# [offset, scale]=
|
|
# [10000, 11536, 13072, 18192]
|
|
# [0, 768, 1536, 4096]
|
|
|
|
# adjusted [ 1.0 * x + 1.0 * y] =
|
|
# [10000, 12304, 14608, 22288]
|
|
|
|
# so, host1 should win:
|
|
options = {}
|
|
weighted_host = least_cost.weighted_sum(fn_tuples, hostinfo_list,
|
|
options)
|
|
self.assertEqual(weighted_host.weight, 10000)
|
|
self.assertEqual(weighted_host.host, 'host1')
|
|
|
|
def test_weighted_sum_single_function(self):
|
|
fn_tuples = [(1.0, offset), ]
|
|
hostinfo_list = self.zone_manager.get_all_host_data(None).items()
|
|
|
|
# host1: free_ram_mb=0
|
|
# host2: free_ram_mb=1536
|
|
# host3: free_ram_mb=3072
|
|
# host4: free_ram_mb=8192
|
|
|
|
# [offset, ]=
|
|
# [10000, 11536, 13072, 18192]
|
|
|
|
# so, host1 should win:
|
|
options = {}
|
|
weighted_host = least_cost.weighted_sum(fn_tuples, hostinfo_list,
|
|
options)
|
|
self.assertEqual(weighted_host.weight, 10000)
|
|
self.assertEqual(weighted_host.host, 'host1')
|