153 lines
5.0 KiB
Python
153 lines
5.0 KiB
Python
# Copyright 2011 OpenStack LLC.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Tests For Zone Aware Scheduler.
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"""
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from nova import test
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from nova.scheduler import driver
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from nova.scheduler import zone_aware_scheduler
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from nova.scheduler import zone_manager
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def _host_caps(multiplier):
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# Returns host capabilities in the following way:
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# host1 = memory:free 10 (100max)
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# disk:available 100 (1000max)
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# hostN = memory:free 10 + 10N
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# disk:available 100 + 100N
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# in other words: hostN has more resources than host0
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# which means ... don't go above 10 hosts.
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return {'host_name-description': 'XenServer %s' % multiplier,
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'host_hostname': 'xs-%s' % multiplier,
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'host_memory_total': 100,
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'host_memory_overhead': 10,
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'host_memory_free': 10 + multiplier * 10,
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'host_memory_free-computed': 10 + multiplier * 10,
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'host_other-config': {},
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'host_ip_address': '192.168.1.%d' % (100 + multiplier),
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'host_cpu_info': {},
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'disk_available': 100 + multiplier * 100,
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'disk_total': 1000,
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'disk_used': 0,
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'host_uuid': 'xxx-%d' % multiplier,
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'host_name-label': 'xs-%s' % multiplier}
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def fake_zone_manager_service_states(num_hosts):
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states = {}
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for x in xrange(num_hosts):
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states['host%02d' % (x + 1)] = {'compute': _host_caps(x)}
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return states
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class FakeZoneAwareScheduler(zone_aware_scheduler.ZoneAwareScheduler):
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def filter_hosts(self, num, specs):
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# NOTE(sirp): this is returning [(hostname, services)]
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return self.zone_manager.service_states.items()
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def weigh_hosts(self, num, specs, hosts):
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fake_weight = 99
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weighted = []
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for hostname, caps in hosts:
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weighted.append(dict(weight=fake_weight, name=hostname))
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return weighted
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class FakeZoneManager(zone_manager.ZoneManager):
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def __init__(self):
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self.service_states = {
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'host1': {
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'compute': {'ram': 1000}
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},
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'host2': {
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'compute': {'ram': 2000}
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},
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'host3': {
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'compute': {'ram': 3000}
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}
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}
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class FakeEmptyZoneManager(zone_manager.ZoneManager):
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def __init__(self):
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self.service_states = {}
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def fake_empty_call_zone_method(context, method, specs):
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return []
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def fake_call_zone_method(context, method, specs):
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return [
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('zone1', [
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dict(weight=1, blob='AAAAAAA'),
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dict(weight=111, blob='BBBBBBB'),
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dict(weight=112, blob='CCCCCCC'),
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dict(weight=113, blob='DDDDDDD'),
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]),
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('zone2', [
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dict(weight=120, blob='EEEEEEE'),
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dict(weight=2, blob='FFFFFFF'),
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dict(weight=122, blob='GGGGGGG'),
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dict(weight=123, blob='HHHHHHH'),
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]),
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('zone3', [
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dict(weight=130, blob='IIIIIII'),
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dict(weight=131, blob='JJJJJJJ'),
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dict(weight=132, blob='KKKKKKK'),
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dict(weight=3, blob='LLLLLLL'),
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]),
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]
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class ZoneAwareSchedulerTestCase(test.TestCase):
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"""Test case for Zone Aware Scheduler."""
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def test_zone_aware_scheduler(self):
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"""
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Create a nested set of FakeZones, ensure that a select call returns the
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appropriate build plan.
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"""
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sched = FakeZoneAwareScheduler()
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self.stubs.Set(sched, '_call_zone_method', fake_call_zone_method)
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zm = FakeZoneManager()
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sched.set_zone_manager(zm)
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fake_context = {}
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build_plan = sched.select(fake_context, {})
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self.assertEqual(15, len(build_plan))
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hostnames = [plan_item['name']
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for plan_item in build_plan if 'name' in plan_item]
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self.assertEqual(3, len(hostnames))
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def test_empty_zone_aware_scheduler(self):
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"""
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Ensure empty hosts & child_zones result in NoValidHosts exception.
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"""
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sched = FakeZoneAwareScheduler()
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self.stubs.Set(sched, '_call_zone_method', fake_empty_call_zone_method)
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zm = FakeEmptyZoneManager()
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sched.set_zone_manager(zm)
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fake_context = {}
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self.assertRaises(driver.NoValidHost, sched.schedule_run_instance,
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fake_context, 1,
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dict(host_filter=None, instance_type={}))
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