d844af06d5
Implements blueprint disk-configuration-parity This change splits local_gb into root_gb and ephemeral_gb. libvirt interpreted local_gb as what ephemeral_gb is now, whereas XenAPI interpreted local_gb as what root_gb is now. Change-Id: I496600991bac1e990326d4ded1607fee08209d68
312 lines
12 KiB
Python
312 lines
12 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 Distributed Scheduler.
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"""
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import json
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from nova import context
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from nova import db
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from nova import exception
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from nova.scheduler import distributed_scheduler
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from nova.scheduler import least_cost
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from nova.scheduler import host_manager
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from nova import test
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from nova.tests.scheduler import fakes
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def fake_call_zone_method(context, method, specs, zones):
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return [
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(1, [
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dict(weight=2, blob='AAAAAAA'),
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dict(weight=4, blob='BBBBBBB'),
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dict(weight=6, blob='CCCCCCC'),
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dict(weight=8, blob='DDDDDDD'),
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]),
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(2, [
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dict(weight=10, blob='EEEEEEE'),
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dict(weight=12, blob='FFFFFFF'),
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dict(weight=14, blob='GGGGGGG'),
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dict(weight=16, blob='HHHHHHH'),
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]),
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(3, [
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dict(weight=18, blob='IIIIIII'),
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dict(weight=20, blob='JJJJJJJ'),
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dict(weight=22, blob='KKKKKKK'),
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dict(weight=24, 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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def fake_filter_hosts(hosts, filter_properties):
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return list(hosts)
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class DistributedSchedulerTestCase(test.TestCase):
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"""Test case for Distributed Scheduler."""
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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 = fakes.FakeDistributedScheduler()
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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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weighted_hosts = sched._adjust_child_weights(child_results, zones)
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scaled = [130000, 131000, 132000, 3000]
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for weighted_host in weighted_hosts:
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w = weighted_host.weight
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if weighted_host.zone == 'zone1': # No change
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self.assertTrue(w < 1000.0)
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if weighted_host.zone == 'zone2': # Offset +1000
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self.assertTrue(w >= 1000.0 and w < 2000)
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if weighted_host.zone == 'zone3': # Scale x1000
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self.assertEqual(scaled.pop(0), w)
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def test_run_instance_no_hosts(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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def _fake_empty_call_zone_method(*args, **kwargs):
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return []
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sched = fakes.FakeDistributedScheduler()
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self.stubs.Set(sched, '_call_zone_method',
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_fake_empty_call_zone_method)
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self.stubs.Set(db, 'zone_get_all', fake_zone_get_all)
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fake_context = context.RequestContext('user', 'project')
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request_spec = {'instance_type': {'memory_mb': 1, 'root_gb': 1,
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'ephemeral_gb': 0},
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'instance_properties': {'project_id': 1}}
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self.assertRaises(exception.NoValidHost, sched.schedule_run_instance,
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fake_context, request_spec)
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def test_run_instance_with_blob_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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self.schedule_called = False
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self.from_blob_called = False
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self.locally_called = False
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self.child_zone_called = False
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def _fake_schedule(*args, **kwargs):
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self.schedule_called = True
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return least_cost.WeightedHost(1, host='x')
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def _fake_make_weighted_host_from_blob(*args, **kwargs):
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self.from_blob_called = True
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return least_cost.WeightedHost(1, zone='x', blob='y')
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def _fake_provision_resource_locally(*args, **kwargs):
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self.locally_called = True
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return 1
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def _fake_ask_child_zone_to_create_instance(*args, **kwargs):
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self.child_zone_called = True
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return 2
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sched = fakes.FakeDistributedScheduler()
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self.stubs.Set(sched, '_schedule', _fake_schedule)
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self.stubs.Set(sched, '_make_weighted_host_from_blob',
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_fake_make_weighted_host_from_blob)
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self.stubs.Set(sched, '_provision_resource_locally',
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_fake_provision_resource_locally)
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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 = {
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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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fake_context = context.RequestContext('user', 'project')
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instances = sched.schedule_run_instance(fake_context, request_spec)
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self.assertTrue(instances)
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self.assertFalse(self.schedule_called)
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self.assertTrue(self.from_blob_called)
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self.assertTrue(self.child_zone_called)
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self.assertFalse(self.locally_called)
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self.assertEquals(instances, [2])
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def test_run_instance_non_admin(self):
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"""Test creating an instance locally using run_instance, passing
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a non-admin context. DB actions should work."""
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self.was_admin = False
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def fake_get(context, *args, **kwargs):
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# make sure this is called with admin context, even though
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# we're using user context below
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self.was_admin = context.is_admin
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return {}
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sched = fakes.FakeDistributedScheduler()
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self.stubs.Set(sched.host_manager, 'get_all_host_states', fake_get)
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fake_context = context.RequestContext('user', 'project')
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request_spec = {'instance_type': {'memory_mb': 1, 'local_gb': 1},
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'instance_properties': {'project_id': 1}}
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self.assertRaises(exception.NoValidHost, sched.schedule_run_instance,
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fake_context, request_spec)
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self.assertTrue(self.was_admin)
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def test_schedule_bad_topic(self):
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"""Parameter checking."""
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sched = fakes.FakeDistributedScheduler()
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fake_context = context.RequestContext('user', 'project')
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self.assertRaises(NotImplementedError, sched._schedule, fake_context,
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"foo", {})
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def test_schedule_no_instance_type(self):
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"""Parameter checking."""
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sched = fakes.FakeDistributedScheduler()
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request_spec = {'instance_properties': {}}
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fake_context = context.RequestContext('user', 'project')
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self.assertRaises(NotImplementedError, sched._schedule, fake_context,
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"compute", request_spec=request_spec)
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def test_schedule_happy_day(self):
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"""Make sure there's nothing glaringly wrong with _schedule()
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by doing a happy day pass through."""
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self.next_weight = 1.0
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def _fake_weighted_sum(functions, hosts, options):
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self.next_weight += 2.0
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host, hostinfo = hosts[0]
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return least_cost.WeightedHost(self.next_weight, host=host,
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hostinfo=hostinfo)
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sched = fakes.FakeDistributedScheduler()
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fake_context = context.RequestContext('user', 'project',
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is_admin=True)
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self.stubs.Set(sched.host_manager, 'filter_hosts',
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fake_filter_hosts)
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self.stubs.Set(least_cost, 'weighted_sum', _fake_weighted_sum)
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self.stubs.Set(db, 'zone_get_all', fake_zone_get_all)
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self.stubs.Set(sched, '_call_zone_method', fake_call_zone_method)
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request_spec = {'num_instances': 10,
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'instance_type': {'memory_mb': 512, 'root_gb': 512,
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'ephemeral_gb': 0},
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'instance_properties': {'project_id': 1}}
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self.mox.ReplayAll()
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weighted_hosts = sched._schedule(fake_context, 'compute',
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request_spec)
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self.mox.VerifyAll()
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self.assertEquals(len(weighted_hosts), 10)
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for weighted_host in weighted_hosts:
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# We set this up so remote hosts have even weights ...
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if int(weighted_host.weight) % 2 == 0:
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self.assertTrue(weighted_host.zone is not None)
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self.assertTrue(weighted_host.host_state is None)
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else:
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self.assertTrue(weighted_host.host_state is not None)
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self.assertTrue(weighted_host.zone is None)
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def test_schedule_local_zone(self):
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"""Test to make sure _schedule makes no call out to zones if
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local_zone_only in the filter_properties is True.
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"""
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self.next_weight = 1.0
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def _fake_weighted_sum(functions, hosts, options):
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self.next_weight += 2.0
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host = hosts[0]
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return least_cost.WeightedHost(self.next_weight, host_state=host)
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sched = fakes.FakeDistributedScheduler()
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fake_context = context.RequestContext('user', 'project',
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is_admin=True)
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fakes.mox_host_manager_db_calls(self.mox, fake_context)
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self.stubs.Set(sched.host_manager, 'filter_hosts',
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fake_filter_hosts)
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self.stubs.Set(least_cost, 'weighted_sum', _fake_weighted_sum)
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self.stubs.Set(db, 'zone_get_all', fake_zone_get_all)
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self.stubs.Set(sched, '_call_zone_method', fake_call_zone_method)
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request_spec = {'num_instances': 10,
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'instance_type': {'memory_mb': 512, 'root_gb': 512,
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'ephemeral_gb': 256},
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'instance_properties': {'project_id': 1,
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'memory_mb': 512,
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'root_gb': 512,
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'ephemeral_gb': 0,
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'vcpus': 1}}
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filter_properties = {'local_zone_only': True}
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self.mox.ReplayAll()
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weighted_hosts = sched._schedule(fake_context, 'compute',
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request_spec, filter_properties=filter_properties)
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self.mox.VerifyAll()
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self.assertEquals(len(weighted_hosts), 10)
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for weighted_host in weighted_hosts:
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# There should be no remote hosts
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self.assertTrue(weighted_host.host_state is not None)
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self.assertTrue(weighted_host.zone is None)
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def test_decrypt_blob(self):
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"""Test that the decrypt method works."""
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fixture = fakes.FakeDistributedScheduler()
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test_data = {'weight': 1, 'host': 'x', 'blob': 'y', 'zone': 'z'}
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class StubDecryptor(object):
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def decryptor(self, key):
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return lambda blob: blob
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self.stubs.Set(distributed_scheduler, 'crypto', StubDecryptor())
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weighted_host = fixture._make_weighted_host_from_blob(
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json.dumps(test_data))
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self.assertTrue(isinstance(weighted_host, least_cost.WeightedHost))
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self.assertEqual(weighted_host.to_dict(), dict(weight=1, host='x',
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blob='y', zone='z'))
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def test_get_cost_functions(self):
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self.flags(reserved_host_memory_mb=128)
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fixture = fakes.FakeDistributedScheduler()
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fns = fixture.get_cost_functions()
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self.assertEquals(len(fns), 1)
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weight, fn = fns[0]
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self.assertEquals(weight, 1.0)
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hostinfo = host_manager.HostState('host', 'compute')
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hostinfo.update_from_compute_node(dict(memory_mb=1000,
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local_gb=0, vcpus=1))
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self.assertEquals(1000 - 128, fn(hostinfo, {}))
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