330 lines
11 KiB
Python
330 lines
11 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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import nova.db
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from nova import exception
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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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# No need to stub anything at the moment
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pass
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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': {'host_memory_free': 1073741824},
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},
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'host2': {
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'compute': {'host_memory_free': 2147483648},
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},
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'host3': {
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'compute': {'host_memory_free': 3221225472},
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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, zones):
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return []
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# Hmm, I should probably be using mox for this.
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was_called = False
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def fake_provision_resource(context, item, instance_id, request_spec, kwargs):
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global was_called
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was_called = True
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def fake_ask_child_zone_to_create_instance(context, zone_info,
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request_spec, kwargs):
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global was_called
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was_called = True
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def fake_provision_resource_locally(context, build_plan, request_spec, kwargs):
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global was_called
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was_called = True
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def fake_provision_resource_from_blob(context, item, instance_id,
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request_spec, kwargs):
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global was_called
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was_called = True
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def fake_decrypt_blob_returns_local_info(blob):
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return {'foo': True} # values aren't important.
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def fake_decrypt_blob_returns_child_info(blob):
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return {'child_zone': True,
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'child_blob': True} # values aren't important. Keys are.
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def fake_call_zone_method(context, method, specs, zones):
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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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def fake_zone_get_all(context):
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return [
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dict(id=1, api_url='zone1',
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username='admin', password='password',
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weight_offset=0.0, weight_scale=1.0),
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dict(id=2, api_url='zone2',
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username='admin', password='password',
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weight_offset=1000.0, weight_scale=1.0),
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dict(id=3, api_url='zone3',
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username='admin', password='password',
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weight_offset=0.0, weight_scale=1000.0),
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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, try to build multiple instances
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and ensure that a select call returns the 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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self.stubs.Set(nova.db, 'zone_get_all', fake_zone_get_all)
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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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{'instance_type': {'memory_mb': 512},
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'num_instances': 4})
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# 4 from local zones, 12 from remotes
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self.assertEqual(16, len(build_plan))
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hostnames = [plan_item['hostname']
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for plan_item in build_plan if 'hostname' in plan_item]
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# 4 local hosts
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self.assertEqual(4, len(hostnames))
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def test_adjust_child_weights(self):
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"""Make sure the weights returned by child zones are
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properly adjusted based on the scale/offset in the zone
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db entries.
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"""
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sched = FakeZoneAwareScheduler()
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child_results = fake_call_zone_method(None, None, None, None)
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zones = fake_zone_get_all(None)
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sched._adjust_child_weights(child_results, zones)
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scaled = [130000, 131000, 132000, 3000]
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for zone, results in child_results:
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for item in results:
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w = item['weight']
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if zone == 'zone1': # No change
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self.assertTrue(w < 1000.0)
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if zone == 'zone2': # Offset +1000
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self.assertTrue(w >= 1000.0 and w < 2000)
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if zone == 'zone3': # Scale x1000
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self.assertEqual(scaled.pop(0), w)
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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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self.stubs.Set(nova.db, 'zone_get_all', fake_zone_get_all)
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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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def test_schedule_do_not_schedule_with_hint(self):
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"""
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Check the local/child zone routing in the run_instance() call.
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If the zone_blob hint was passed in, don't re-schedule.
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"""
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global was_called
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sched = FakeZoneAwareScheduler()
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was_called = False
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self.stubs.Set(sched, '_provision_resource', fake_provision_resource)
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request_spec = {
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'instance_properties': {},
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'instance_type': {},
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'filter_driver': 'nova.scheduler.host_filter.AllHostsFilter',
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'blob': "Non-None blob data",
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}
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result = sched.schedule_run_instance(None, 1, request_spec)
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self.assertEquals(None, result)
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self.assertTrue(was_called)
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def test_provision_resource_local(self):
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"""Provision a resource locally or remotely."""
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global was_called
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sched = FakeZoneAwareScheduler()
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was_called = False
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self.stubs.Set(sched, '_provision_resource_locally',
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fake_provision_resource_locally)
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request_spec = {'hostname': "foo"}
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sched._provision_resource(None, request_spec, 1, request_spec, {})
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self.assertTrue(was_called)
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def test_provision_resource_remote(self):
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"""Provision a resource locally or remotely."""
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global was_called
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sched = FakeZoneAwareScheduler()
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was_called = False
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self.stubs.Set(sched, '_provision_resource_from_blob',
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fake_provision_resource_from_blob)
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request_spec = {}
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sched._provision_resource(None, request_spec, 1, request_spec, {})
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self.assertTrue(was_called)
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def test_provision_resource_from_blob_empty(self):
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"""Provision a resource locally or remotely given no hints."""
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global was_called
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sched = FakeZoneAwareScheduler()
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request_spec = {}
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self.assertRaises(zone_aware_scheduler.InvalidBlob,
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sched._provision_resource_from_blob,
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None, {}, 1, {}, {})
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def test_provision_resource_from_blob_with_local_blob(self):
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"""
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Provision a resource locally or remotely when blob hint passed in.
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"""
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global was_called
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sched = FakeZoneAwareScheduler()
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was_called = False
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self.stubs.Set(sched, '_decrypt_blob',
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fake_decrypt_blob_returns_local_info)
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self.stubs.Set(sched, '_provision_resource_locally',
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fake_provision_resource_locally)
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request_spec = {'blob': "Non-None blob data"}
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sched._provision_resource_from_blob(None, request_spec, 1,
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request_spec, {})
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self.assertTrue(was_called)
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def test_provision_resource_from_blob_with_child_blob(self):
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"""
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Provision a resource locally or remotely when child blob hint
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passed in.
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"""
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global was_called
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sched = FakeZoneAwareScheduler()
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self.stubs.Set(sched, '_decrypt_blob',
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fake_decrypt_blob_returns_child_info)
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was_called = False
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self.stubs.Set(sched, '_ask_child_zone_to_create_instance',
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fake_ask_child_zone_to_create_instance)
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request_spec = {'blob': "Non-None blob data"}
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sched._provision_resource_from_blob(None, request_spec, 1,
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request_spec, {})
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self.assertTrue(was_called)
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def test_provision_resource_from_blob_with_immediate_child_blob(self):
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"""
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Provision a resource locally or remotely when blob hint passed in
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from an immediate child.
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"""
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global was_called
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sched = FakeZoneAwareScheduler()
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was_called = False
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self.stubs.Set(sched, '_ask_child_zone_to_create_instance',
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fake_ask_child_zone_to_create_instance)
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request_spec = {'child_blob': True, 'child_zone': True}
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sched._provision_resource_from_blob(None, request_spec, 1,
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request_spec, {})
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self.assertTrue(was_called)
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