144 lines
4.9 KiB
Python
144 lines
4.9 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 Least Cost functions.
|
|
"""
|
|
from nova import config
|
|
from nova import context
|
|
from nova.openstack.common import cfg
|
|
from nova.scheduler import weights
|
|
from nova.scheduler.weights import least_cost
|
|
from nova import test
|
|
from nova.tests.scheduler import fakes
|
|
|
|
|
|
test_least_cost_opts = [
|
|
cfg.FloatOpt('compute_fake_weigher1_weight',
|
|
default=2.0,
|
|
help='How much weight to give the fake_weigher1 function'),
|
|
cfg.FloatOpt('compute_fake_weigher2_weight',
|
|
default=1.0,
|
|
help='How much weight to give the fake_weigher2 function'),
|
|
]
|
|
|
|
CONF = config.CONF
|
|
CONF.import_opt('least_cost_functions', 'nova.scheduler.weights.least_cost')
|
|
CONF.import_opt('compute_fill_first_cost_fn_weight',
|
|
'nova.scheduler.weights.least_cost')
|
|
CONF.register_opts(test_least_cost_opts)
|
|
|
|
|
|
def compute_fake_weigher1(hostinfo, options):
|
|
return hostinfo.free_ram_mb + 10000
|
|
|
|
|
|
def compute_fake_weigher2(hostinfo, options):
|
|
return hostinfo.free_ram_mb * 2
|
|
|
|
|
|
class LeastCostTestCase(test.TestCase):
|
|
def setUp(self):
|
|
super(LeastCostTestCase, self).setUp()
|
|
self.host_manager = fakes.FakeHostManager()
|
|
self.weight_handler = weights.HostWeightHandler()
|
|
|
|
def _get_weighed_host(self, hosts, weight_properties=None):
|
|
weigher_classes = least_cost.get_least_cost_weighers()
|
|
if weight_properties is None:
|
|
weight_properties = {}
|
|
return self.weight_handler.get_weighed_objects(weigher_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_spread_first(self):
|
|
# Default modifier is -1.0, so it turns out that hosts with
|
|
# the most free memory win
|
|
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, 8192)
|
|
self.assertEqual(weighed_host.obj.host, 'host4')
|
|
|
|
def test_filling_first(self):
|
|
self.flags(compute_fill_first_cost_fn_weight=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_weighted_sum_provided_method(self):
|
|
fns = ['nova.tests.scheduler.test_least_cost.compute_fake_weigher1',
|
|
'nova.tests.scheduler.test_least_cost.compute_fake_weigher2']
|
|
self.flags(least_cost_functions=fns)
|
|
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
|
|
|
|
# [offset, scale]=
|
|
# [10512, 11024, 13072, 18192]
|
|
# [1024, 2048, 6144, 16384]
|
|
|
|
# adjusted [ 2.0 * x + 1.0 * y] =
|
|
# [22048, 24096, 32288, 52768]
|
|
|
|
# so, host1 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(weighed_host.weight, 52768)
|
|
self.assertEqual(weighed_host.obj.host, 'host4')
|
|
|
|
def test_weighted_sum_single_function(self):
|
|
fns = ['nova.tests.scheduler.test_least_cost.compute_fake_weigher1']
|
|
self.flags(least_cost_functions=fns)
|
|
hostinfo_list = self._get_all_hosts()
|
|
|
|
# host1: free_ram_mb=0
|
|
# host2: free_ram_mb=1536
|
|
# host3: free_ram_mb=3072
|
|
# host4: free_ram_mb=8192
|
|
|
|
# [offset, ]=
|
|
# [10512, 11024, 13072, 18192]
|
|
# adjusted [ 2.0 * x ]=
|
|
# [21024, 22048, 26144, 36384]
|
|
|
|
# so, host1 should win:
|
|
weighed_host = self._get_weighed_host(hostinfo_list)
|
|
self.assertEqual(weighed_host.weight, 36384)
|
|
self.assertEqual(weighed_host.obj.host, 'host4')
|