118 lines
4.3 KiB
Python
118 lines
4.3 KiB
Python
# Copyright 2011-2012 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 Scheduler weights.
|
|
"""
|
|
|
|
from nova import context
|
|
from nova.scheduler import weights
|
|
from nova import test
|
|
from nova.tests import matchers
|
|
from nova.tests.scheduler import fakes
|
|
|
|
|
|
class TestWeighedHost(test.TestCase):
|
|
def test_dict_conversion(self):
|
|
host_state = fakes.FakeHostState('somehost', None, {})
|
|
host = weights.WeighedHost(host_state, 'someweight')
|
|
expected = {'weight': 'someweight',
|
|
'host': 'somehost'}
|
|
self.assertThat(host.to_dict(), matchers.DictMatches(expected))
|
|
|
|
def test_all_weighers(self):
|
|
classes = weights.all_weighers()
|
|
class_names = [cls.__name__ for cls in classes]
|
|
self.assertEqual(len(classes), 1)
|
|
self.assertIn('RAMWeigher', class_names)
|
|
|
|
def test_all_weighers_with_deprecated_config1(self):
|
|
self.flags(compute_fill_first_cost_fn_weight=-1.0)
|
|
classes = weights.all_weighers()
|
|
class_names = [cls.__name__ for cls in classes]
|
|
self.assertEqual(len(classes), 1)
|
|
self.assertIn('_LeastCostWeigher', class_names)
|
|
|
|
def test_all_weighers_with_deprecated_config2(self):
|
|
self.flags(least_cost_functions=['something'])
|
|
classes = weights.all_weighers()
|
|
class_names = [cls.__name__ for cls in classes]
|
|
self.assertEqual(len(classes), 1)
|
|
self.assertIn('_LeastCostWeigher', class_names)
|
|
|
|
|
|
class RamWeigherTestCase(test.TestCase):
|
|
def setUp(self):
|
|
super(RamWeigherTestCase, self).setUp()
|
|
self.host_manager = fakes.FakeHostManager()
|
|
self.weight_handler = weights.HostWeightHandler()
|
|
self.weight_classes = self.weight_handler.get_matching_classes(
|
|
['nova.scheduler.weights.ram.RAMWeigher'])
|
|
|
|
def _get_weighed_host(self, hosts, weight_properties=None):
|
|
if weight_properties is None:
|
|
weight_properties = {}
|
|
return self.weight_handler.get_weighed_objects(self.weight_classes,
|
|
hosts, weight_properties)[0]
|
|
|
|
def _get_all_hosts(self):
|
|
ctxt = context.get_admin_context()
|
|
fakes.mox_host_manager_db_calls(self.mox, ctxt)
|
|
self.mox.ReplayAll()
|
|
host_states = self.host_manager.get_all_host_states(ctxt)
|
|
self.mox.VerifyAll()
|
|
self.mox.ResetAll()
|
|
return host_states
|
|
|
|
def test_default_of_spreading_first(self):
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: free_ram_mb=512
|
|
# host2: free_ram_mb=1024
|
|
# host3: free_ram_mb=3072
|
|
# host4: free_ram_mb=8192
|
|
|
|
# so, host4 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(weighed_host.weight, 8192)
|
|
self.assertEqual(weighed_host.obj.host, 'host4')
|
|
|
|
def test_ram_filter_multiplier1(self):
|
|
self.flags(ram_weight_multiplier=-1.0)
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: free_ram_mb=-512
|
|
# host2: free_ram_mb=-1024
|
|
# host3: free_ram_mb=-3072
|
|
# host4: free_ram_mb=-8192
|
|
|
|
# so, host1 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(weighed_host.weight, -512)
|
|
self.assertEqual(weighed_host.obj.host, 'host1')
|
|
|
|
def test_ram_filter_multiplier2(self):
|
|
self.flags(ram_weight_multiplier=2.0)
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: free_ram_mb=512 * 2
|
|
# host2: free_ram_mb=1024 * 2
|
|
# host3: free_ram_mb=3072 * 2
|
|
# host4: free_ram_mb=8192 * 2
|
|
|
|
# so, host4 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(weighed_host.weight, 8192 * 2)
|
|
self.assertEqual(weighed_host.obj.host, 'host4')
|