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# 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 hypervisor version weights.
"""
from nova.scheduler import weights
from nova.scheduler.weights import hypervisor_version
from nova import test
from nova.tests.unit.scheduler import fakes
class HypervisorVersionWeigherTestCase(test.NoDBTestCase):
def setUp(self):
super().setUp()
self.weight_handler = weights.HostWeightHandler()
self.weighers = [hypervisor_version.HypervisorVersionWeigher()]
def _get_weighed_host(self, hosts, weight_properties=None):
if weight_properties is None:
weight_properties = {}
return self.weight_handler.get_weighed_objects(self.weighers,
hosts, weight_properties)[0]
def _get_all_hosts(self):
host_values = [
('host1', 'node1', {'hypervisor_version': 1}),
('host2', 'node2', {'hypervisor_version': 200}),
('host3', 'node3', {'hypervisor_version': 100}),
('host4', 'node4', {'hypervisor_version': 1000}),
]
return [fakes.FakeHostState(host, node, values)
for host, node, values in host_values]
def test_multiplier_default(self):
hostinfo_list = self._get_all_hosts()
weighed_host = self._get_weighed_host(hostinfo_list)
self.assertEqual(1.0, weighed_host.weight)
self.assertEqual('host4', weighed_host.obj.host)
def test_multiplier_default_full_ordering(self):
hostinfo_list = self._get_all_hosts()
weighed_hosts = self.weight_handler.get_weighed_objects(
self.weighers, hostinfo_list, {}
)
expected_hosts = [fakes.FakeHostState(host, node, values)
for host, node, values in [
('host4', 'node4', {'hypervisor_version': 1000}),
('host2', 'node2', {'hypervisor_version': 200}),
('host3', 'node3', {'hypervisor_version': 100}),
('host1', 'node1', {'hypervisor_version': 1}),
]]
for actual, expected in zip(
weighed_hosts,
expected_hosts
):
self.assertEqual(actual.obj.host, expected.host)
def test_multiplier_none(self):
multi = 0.0
self.flags(
hypervisor_version_weight_multiplier=multi,
group='filter_scheduler'
)
hostinfo_list = self._get_all_hosts()
weighed_host = self._get_weighed_host(hostinfo_list)
self.assertEqual(multi, weighed_host.weight)
def test_multiplier_positive(self):
multi = 2.0
self.flags(
hypervisor_version_weight_multiplier=multi,
group='filter_scheduler'
)
hostinfo_list = self._get_all_hosts()
weighed_host = self._get_weighed_host(hostinfo_list)
self.assertEqual(1.0 * multi, weighed_host.weight)
self.assertEqual('host4', weighed_host.obj.host)
def test_multiplier_negative(self):
multi = -1.0
self.flags(
hypervisor_version_weight_multiplier=multi,
group='filter_scheduler'
)
hostinfo_list = self._get_all_hosts()
weighed_host = self._get_weighed_host(hostinfo_list)
self.assertEqual('host1', weighed_host.obj.host)
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