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trilio-internal
trilio-internal / idna python
Repository URL to install this package:
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Version:
2.5 ▾
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# Copyright (c) 2011 OpenStack Foundation
# 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 HostManager
"""
import collections
import datetime
import mock
from oslo_serialization import jsonutils
from oslo_utils import versionutils
import six
import nova
from nova.compute import task_states
from nova.compute import vm_states
import nova.conf
from nova import exception
from nova import objects
from nova.objects import base as obj_base
from nova.pci import stats as pci_stats
from nova.scheduler import filters
from nova.scheduler import host_manager
from nova import test
from nova.tests import fixtures
from nova.tests.unit import fake_instance
from nova.tests.unit import matchers
from nova.tests.unit.scheduler import fakes
from nova.tests import uuidsentinel as uuids
CONF = nova.conf.CONF
class FakeFilterClass1(filters.BaseHostFilter):
def host_passes(self, host_state, filter_properties):
pass
class FakeFilterClass2(filters.BaseHostFilter):
def host_passes(self, host_state, filter_properties):
pass
class HostManagerTestCase(test.NoDBTestCase):
"""Test case for HostManager class."""
@mock.patch.object(host_manager.HostManager, '_init_instance_info')
@mock.patch.object(host_manager.HostManager, '_init_aggregates')
def setUp(self, mock_init_agg, mock_init_inst):
super(HostManagerTestCase, self).setUp()
self.flags(scheduler_available_filters=['%s.%s' % (__name__, cls) for
cls in ['FakeFilterClass1',
'FakeFilterClass2']])
self.flags(scheduler_default_filters=['FakeFilterClass1'])
self.host_manager = host_manager.HostManager()
self.fake_hosts = [host_manager.HostState('fake_host%s' % x,
'fake-node') for x in range(1, 5)]
self.fake_hosts += [host_manager.HostState('fake_multihost',
'fake-node%s' % x) for x in range(1, 5)]
self.useFixture(fixtures.SpawnIsSynchronousFixture())
def test_load_filters(self):
filters = self.host_manager._load_filters()
self.assertEqual(filters, ['FakeFilterClass1'])
@mock.patch.object(nova.objects.InstanceList, 'get_by_filters')
@mock.patch.object(nova.objects.ComputeNodeList, 'get_all')
def test_init_instance_info_batches(self, mock_get_all,
mock_get_by_filters):
cn_list = objects.ComputeNodeList()
for num in range(22):
host_name = 'host_%s' % num
cn_list.objects.append(objects.ComputeNode(host=host_name))
mock_get_all.return_value = cn_list
self.host_manager._init_instance_info()
self.assertEqual(mock_get_by_filters.call_count, 3)
@mock.patch.object(nova.objects.InstanceList, 'get_by_filters')
@mock.patch.object(nova.objects.ComputeNodeList, 'get_all')
def test_init_instance_info(self, mock_get_all,
mock_get_by_filters):
cn1 = objects.ComputeNode(host='host1')
cn2 = objects.ComputeNode(host='host2')
inst1 = objects.Instance(host='host1', uuid=uuids.instance_1)
inst2 = objects.Instance(host='host1', uuid=uuids.instance_2)
inst3 = objects.Instance(host='host2', uuid=uuids.instance_3)
mock_get_all.return_value = objects.ComputeNodeList(objects=[cn1, cn2])
mock_get_by_filters.return_value = objects.InstanceList(
objects=[inst1, inst2, inst3])
hm = self.host_manager
hm._instance_info = {}
hm._init_instance_info()
self.assertEqual(len(hm._instance_info), 2)
fake_info = hm._instance_info['host1']
self.assertIn(uuids.instance_1, fake_info['instances'])
self.assertIn(uuids.instance_2, fake_info['instances'])
self.assertNotIn(uuids.instance_3, fake_info['instances'])
exp_filters = {'deleted': False, 'host': [u'host1', u'host2']}
mock_get_by_filters.assert_called_once_with(mock.ANY, exp_filters)
@mock.patch.object(nova.objects.InstanceList, 'get_by_filters')
@mock.patch.object(nova.objects.ComputeNodeList, 'get_all')
def test_init_instance_info_compute_nodes(self, mock_get_all,
mock_get_by_filters):
cn1 = objects.ComputeNode(host='host1')
cn2 = objects.ComputeNode(host='host2')
inst1 = objects.Instance(host='host1', uuid=uuids.instance_1)
inst2 = objects.Instance(host='host1', uuid=uuids.instance_2)
inst3 = objects.Instance(host='host2', uuid=uuids.instance_3)
mock_get_by_filters.return_value = objects.InstanceList(
objects=[inst1, inst2, inst3])
hm = self.host_manager
hm._instance_info = {}
hm._init_instance_info([cn1, cn2])
self.assertEqual(len(hm._instance_info), 2)
fake_info = hm._instance_info['host1']
self.assertIn(uuids.instance_1, fake_info['instances'])
self.assertIn(uuids.instance_2, fake_info['instances'])
self.assertNotIn(uuids.instance_3, fake_info['instances'])
exp_filters = {'deleted': False, 'host': [u'host1', u'host2']}
mock_get_by_filters.assert_called_once_with(mock.ANY, exp_filters)
# should not be called if the list of nodes was passed explicitly
self.assertFalse(mock_get_all.called)
def test_default_filters(self):
default_filters = self.host_manager.default_filters
self.assertEqual(1, len(default_filters))
self.assertIsInstance(default_filters[0], FakeFilterClass1)
@mock.patch.object(host_manager.HostManager, '_init_instance_info')
@mock.patch.object(objects.AggregateList, 'get_all')
def test_init_aggregates_no_aggs(self, agg_get_all, mock_init_info):
agg_get_all.return_value = []
self.host_manager = host_manager.HostManager()
self.assertEqual({}, self.host_manager.aggs_by_id)
self.assertEqual({}, self.host_manager.host_aggregates_map)
@mock.patch.object(host_manager.HostManager, '_init_instance_info')
@mock.patch.object(objects.AggregateList, 'get_all')
def test_init_aggregates_one_agg_no_hosts(self, agg_get_all,
mock_init_info):
fake_agg = objects.Aggregate(id=1, hosts=[])
agg_get_all.return_value = [fake_agg]
self.host_manager = host_manager.HostManager()
self.assertEqual({1: fake_agg}, self.host_manager.aggs_by_id)
self.assertEqual({}, self.host_manager.host_aggregates_map)
@mock.patch.object(host_manager.HostManager, '_init_instance_info')
@mock.patch.object(objects.AggregateList, 'get_all')
def test_init_aggregates_one_agg_with_hosts(self, agg_get_all,
mock_init_info):
fake_agg = objects.Aggregate(id=1, hosts=['fake-host'])
agg_get_all.return_value = [fake_agg]
self.host_manager = host_manager.HostManager()
self.assertEqual({1: fake_agg}, self.host_manager.aggs_by_id)
self.assertEqual({'fake-host': set([1])},
self.host_manager.host_aggregates_map)
def test_update_aggregates(self):
fake_agg = objects.Aggregate(id=1, hosts=['fake-host'])
self.host_manager.update_aggregates([fake_agg])
self.assertEqual({1: fake_agg}, self.host_manager.aggs_by_id)
self.assertEqual({'fake-host': set([1])},
self.host_manager.host_aggregates_map)
def test_update_aggregates_remove_hosts(self):
fake_agg = objects.Aggregate(id=1, hosts=['fake-host'])
self.host_manager.update_aggregates([fake_agg])
self.assertEqual({1: fake_agg}, self.host_manager.aggs_by_id)
self.assertEqual({'fake-host': set([1])},
self.host_manager.host_aggregates_map)
# Let's remove the host from the aggregate and update again
fake_agg.hosts = []
self.host_manager.update_aggregates([fake_agg])
self.assertEqual({1: fake_agg}, self.host_manager.aggs_by_id)
self.assertEqual({'fake-host': set([])},
self.host_manager.host_aggregates_map)
def test_delete_aggregate(self):
fake_agg = objects.Aggregate(id=1, hosts=['fake-host'])
self.host_manager.host_aggregates_map = collections.defaultdict(
set, {'fake-host': set([1])})
self.host_manager.aggs_by_id = {1: fake_agg}
self.host_manager.delete_aggregate(fake_agg)
self.assertEqual({}, self.host_manager.aggs_by_id)
self.assertEqual({'fake-host': set([])},
self.host_manager.host_aggregates_map)
def test_choose_host_filters_not_found(self):
self.assertRaises(exception.SchedulerHostFilterNotFound,
self.host_manager._choose_host_filters,
'FakeFilterClass3')
def test_choose_host_filters(self):
# Test we return 1 correct filter object
host_filters = self.host_manager._choose_host_filters(
['FakeFilterClass2'])
self.assertEqual(1, len(host_filters))
self.assertIsInstance(host_filters[0], FakeFilterClass2)
def _mock_get_filtered_hosts(self, info):
info['got_objs'] = []
info['got_fprops'] = []
def fake_filter_one(_self, obj, filter_props):
info['got_objs'].append(obj)
info['got_fprops'].append(filter_props)
return True
self.stub_out(__name__ + '.FakeFilterClass1._filter_one',
fake_filter_one)
def _verify_result(self, info, result, filters=True):
for x in info['got_fprops']:
self.assertEqual(x, info['expected_fprops'])
if filters:
self.assertEqual(set(info['expected_objs']), set(info['got_objs']))
self.assertEqual(set(info['expected_objs']), set(result))
def test_get_filtered_hosts(self):
fake_properties = objects.RequestSpec(ignore_hosts=[],
instance_uuid=uuids.instance,
force_hosts=[],
force_nodes=[])
info = {'expected_objs': self.fake_hosts,
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result)
def test_get_filtered_hosts_with_requested_destination(self):
dest = objects.Destination(host='fake_host1', node='fake-node')
fake_properties = objects.RequestSpec(requested_destination=dest,
ignore_hosts=[],
instance_uuid=uuids.fake_uuid1,
force_hosts=[],
force_nodes=[])
info = {'expected_objs': [self.fake_hosts[0]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result)
def test_get_filtered_hosts_with_wrong_requested_destination(self):
dest = objects.Destination(host='dummy', node='fake-node')
fake_properties = objects.RequestSpec(requested_destination=dest,
ignore_hosts=[],
instance_uuid=uuids.fake_uuid1,
force_hosts=[],
force_nodes=[])
info = {'expected_objs': [],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result)
def test_get_filtered_hosts_with_ignore(self):
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=['fake_host1', 'fake_host3',
'fake_host5', 'fake_multihost'],
force_hosts=[],
force_nodes=[])
# [1] and [3] are host2 and host4
info = {'expected_objs': [self.fake_hosts[1], self.fake_hosts[3]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result)
def test_get_filtered_hosts_with_ignore_case_insensitive(self):
fake_properties = objects.RequestSpec(
instance_uuids=uuids.fakehost,
ignore_hosts=['FAKE_HOST1', 'FaKe_HoSt3', 'Fake_Multihost'],
force_hosts=[],
force_nodes=[])
# [1] and [3] are host2 and host4
info = {'expected_objs': [self.fake_hosts[1], self.fake_hosts[3]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result)
def test_get_filtered_hosts_with_force_hosts(self):
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=[],
force_hosts=['fake_host1', 'fake_host3', 'fake_host5'],
force_nodes=[])
# [0] and [2] are host1 and host3
info = {'expected_objs': [self.fake_hosts[0], self.fake_hosts[2]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_force_case_insensitive(self):
fake_properties = objects.RequestSpec(
instance_uuids=uuids.fakehost,
ignore_hosts=[],
force_hosts=['FAKE_HOST1', 'FaKe_HoSt3', 'fake_host4',
'faKe_host5'],
force_nodes=[])
# [1] and [3] are host2 and host4
info = {'expected_objs': [self.fake_hosts[0], self.fake_hosts[2],
self.fake_hosts[3]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_no_matching_force_hosts(self):
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=[],
force_hosts=['fake_host5', 'fake_host6'],
force_nodes=[])
info = {'expected_objs': [],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
with mock.patch.object(self.host_manager.filter_handler,
'get_filtered_objects') as fake_filter:
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self.assertFalse(fake_filter.called)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_ignore_and_force_hosts(self):
# Ensure ignore_hosts processed before force_hosts in host filters.
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=['fake_host1'],
force_hosts=['fake_host3', 'fake_host1'],
force_nodes=[])
# only fake_host3 should be left.
info = {'expected_objs': [self.fake_hosts[2]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_force_host_and_many_nodes(self):
# Ensure all nodes returned for a host with many nodes
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=[],
force_hosts=['fake_multihost'],
force_nodes=[])
info = {'expected_objs': [self.fake_hosts[4], self.fake_hosts[5],
self.fake_hosts[6], self.fake_hosts[7]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_force_nodes(self):
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=[],
force_hosts=[],
force_nodes=['fake-node2', 'fake-node4', 'fake-node9'])
# [5] is fake-node2, [7] is fake-node4
info = {'expected_objs': [self.fake_hosts[5], self.fake_hosts[7]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_force_hosts_and_nodes(self):
# Ensure only overlapping results if both force host and node
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=[],
force_hosts=['fake-host1', 'fake_multihost'],
force_nodes=['fake-node2', 'fake-node9'])
# [5] is fake-node2
info = {'expected_objs': [self.fake_hosts[5]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_force_hosts_and_wrong_nodes(self):
# Ensure non-overlapping force_node and force_host yield no result
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=[],
force_hosts=['fake_multihost'],
force_nodes=['fake-node'])
info = {'expected_objs': [],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_ignore_hosts_and_force_nodes(self):
# Ensure ignore_hosts can coexist with force_nodes
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=['fake_host1', 'fake_host2'],
force_hosts=[],
force_nodes=['fake-node4', 'fake-node2'])
info = {'expected_objs': [self.fake_hosts[5], self.fake_hosts[7]],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
def test_get_filtered_hosts_with_ignore_hosts_and_force_same_nodes(self):
# Ensure ignore_hosts is processed before force_nodes
fake_properties = objects.RequestSpec(
instance_uuid=uuids.instance,
ignore_hosts=['fake_multihost'],
force_hosts=[],
force_nodes=['fake_node4', 'fake_node2'])
info = {'expected_objs': [],
'expected_fprops': fake_properties}
self._mock_get_filtered_hosts(info)
result = self.host_manager.get_filtered_hosts(self.fake_hosts,
fake_properties)
self._verify_result(info, result, False)
@mock.patch('nova.scheduler.host_manager.LOG')
@mock.patch('nova.objects.ServiceList.get_by_binary')
@mock.patch('nova.objects.ComputeNodeList.get_all')
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_get_all_host_states(self, mock_get_by_host, mock_get_all,
mock_get_by_binary, mock_log):
mock_get_by_host.return_value = objects.InstanceList()
mock_get_all.return_value = fakes.COMPUTE_NODES
mock_get_by_binary.return_value = fakes.SERVICES
context = 'fake_context'
self.host_manager.get_all_host_states(context)
host_states_map = self.host_manager.host_state_map
self.assertEqual(len(host_states_map), 4)
calls = [
mock.call(
"Host %(hostname)s has more disk space than database "
"expected (%(physical)s GB > %(database)s GB)",
{'physical': 3333, 'database': 3072, 'hostname': 'node3'}
),
mock.call(
"No compute service record found for host %(host)s",
{'host': 'fake'}
)
]
self.assertEqual(calls, mock_log.warning.call_args_list)
# Check that .service is set properly
for i in range(4):
compute_node = fakes.COMPUTE_NODES[i]
host = compute_node.host
node = compute_node.hypervisor_hostname
state_key = (host, node)
self.assertEqual(host_states_map[state_key].service,
obj_base.obj_to_primitive(fakes.get_service_by_host(host)))
self.assertEqual(host_states_map[('host1', 'node1')].free_ram_mb,
512)
# 511GB
self.assertEqual(host_states_map[('host1', 'node1')].free_disk_mb,
524288)
self.assertEqual(host_states_map[('host2', 'node2')].free_ram_mb,
1024)
# 1023GB
self.assertEqual(host_states_map[('host2', 'node2')].free_disk_mb,
1048576)
self.assertEqual(host_states_map[('host3', 'node3')].free_ram_mb,
3072)
# 3071GB
self.assertEqual(host_states_map[('host3', 'node3')].free_disk_mb,
3145728)
self.assertThat(
objects.NUMATopology.obj_from_db_obj(
host_states_map[('host3', 'node3')].numa_topology
)._to_dict(),
matchers.DictMatches(fakes.NUMA_TOPOLOGY._to_dict()))
self.assertEqual(host_states_map[('host4', 'node4')].free_ram_mb,
8192)
# 8191GB
self.assertEqual(host_states_map[('host4', 'node4')].free_disk_mb,
8388608)
@mock.patch.object(nova.objects.InstanceList, 'get_by_host')
@mock.patch.object(host_manager.HostState, '_update_from_compute_node')
@mock.patch.object(objects.ComputeNodeList, 'get_all')
@mock.patch.object(objects.ServiceList, 'get_by_binary')
def test_get_all_host_states_with_no_aggs(self, svc_get_by_binary,
cn_get_all, update_from_cn,
mock_get_by_host):
svc_get_by_binary.return_value = [objects.Service(host='fake')]
cn_get_all.return_value = [
objects.ComputeNode(host='fake', hypervisor_hostname='fake')]
mock_get_by_host.return_value = objects.InstanceList()
self.host_manager.host_aggregates_map = collections.defaultdict(set)
self.host_manager.get_all_host_states('fake-context')
host_state = self.host_manager.host_state_map[('fake', 'fake')]
self.assertEqual([], host_state.aggregates)
@mock.patch.object(nova.objects.InstanceList, 'get_by_host')
@mock.patch.object(host_manager.HostState, '_update_from_compute_node')
@mock.patch.object(objects.ComputeNodeList, 'get_all')
@mock.patch.object(objects.ServiceList, 'get_by_binary')
def test_get_all_host_states_with_matching_aggs(self, svc_get_by_binary,
cn_get_all,
update_from_cn,
mock_get_by_host):
svc_get_by_binary.return_value = [objects.Service(host='fake')]
cn_get_all.return_value = [
objects.ComputeNode(host='fake', hypervisor_hostname='fake')]
mock_get_by_host.return_value = objects.InstanceList()
fake_agg = objects.Aggregate(id=1)
self.host_manager.host_aggregates_map = collections.defaultdict(
set, {'fake': set([1])})
self.host_manager.aggs_by_id = {1: fake_agg}
self.host_manager.get_all_host_states('fake-context')
host_state = self.host_manager.host_state_map[('fake', 'fake')]
self.assertEqual([fake_agg], host_state.aggregates)
@mock.patch.object(nova.objects.InstanceList, 'get_by_host')
@mock.patch.object(host_manager.HostState, '_update_from_compute_node')
@mock.patch.object(objects.ComputeNodeList, 'get_all')
@mock.patch.object(objects.ServiceList, 'get_by_binary')
def test_get_all_host_states_with_not_matching_aggs(self,
svc_get_by_binary,
cn_get_all,
update_from_cn,
mock_get_by_host):
svc_get_by_binary.return_value = [objects.Service(host='fake'),
objects.Service(host='other')]
cn_get_all.return_value = [
objects.ComputeNode(host='fake', hypervisor_hostname='fake'),
objects.ComputeNode(host='other', hypervisor_hostname='other')]
mock_get_by_host.return_value = objects.InstanceList()
fake_agg = objects.Aggregate(id=1)
self.host_manager.host_aggregates_map = collections.defaultdict(
set, {'other': set([1])})
self.host_manager.aggs_by_id = {1: fake_agg}
self.host_manager.get_all_host_states('fake-context')
host_state = self.host_manager.host_state_map[('fake', 'fake')]
self.assertEqual([], host_state.aggregates)
@mock.patch.object(nova.objects.InstanceList, 'get_by_host',
return_value=objects.InstanceList())
@mock.patch.object(host_manager.HostState, '_update_from_compute_node')
@mock.patch.object(objects.ComputeNodeList, 'get_all')
@mock.patch.object(objects.ServiceList, 'get_by_binary')
def test_get_all_host_states_corrupt_aggregates_info(self,
svc_get_by_binary,
cn_get_all,
update_from_cn,
mock_get_by_host):
"""Regression test for bug 1605804
A host can be in multiple host-aggregates at the same time. When a
host gets removed from an aggregate in thread A and this aggregate
gets deleted in thread B, there can be a race-condition where the
mapping data in the host_manager can get out of sync for a moment.
This test simulates this condition for the bug-fix.
"""
host_a = 'host_a'
host_b = 'host_b'
svc_get_by_binary.return_value = [objects.Service(host=host_a),
objects.Service(host=host_b)]
cn_get_all.return_value = [
objects.ComputeNode(host=host_a, hypervisor_hostname=host_a),
objects.ComputeNode(host=host_b, hypervisor_hostname=host_b)]
aggregate = objects.Aggregate(id=1)
aggregate.hosts = [host_a, host_b]
aggr_list = objects.AggregateList()
aggr_list.objects = [aggregate]
self.host_manager.update_aggregates(aggr_list)
aggregate.hosts = [host_a]
self.host_manager.delete_aggregate(aggregate)
self.host_manager.get_all_host_states('fake-context')
@mock.patch('nova.objects.ServiceList.get_by_binary')
@mock.patch('nova.objects.ComputeNodeList.get_all')
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_get_all_host_states_updated(self, mock_get_by_host,
mock_get_all_comp,
mock_get_svc_by_binary):
mock_get_all_comp.return_value = fakes.COMPUTE_NODES
mock_get_svc_by_binary.return_value = fakes.SERVICES
context = 'fake_context'
hm = self.host_manager
inst1 = objects.Instance(uuid=uuids.instance)
cn1 = objects.ComputeNode(host='host1')
hm._instance_info = {'host1': {'instances': {uuids.instance: inst1},
'updated': True}}
host_state = host_manager.HostState('host1', cn1)
self.assertFalse(host_state.instances)
mock_get_by_host.return_value = None
host_state.update(
inst_dict=hm._get_instance_info(context, cn1))
self.assertFalse(mock_get_by_host.called)
self.assertTrue(host_state.instances)
self.assertEqual(host_state.instances[uuids.instance], inst1)
@mock.patch('nova.objects.ServiceList.get_by_binary')
@mock.patch('nova.objects.ComputeNodeList.get_all')
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_get_all_host_states_not_updated(self, mock_get_by_host,
mock_get_all_comp,
mock_get_svc_by_binary):
mock_get_all_comp.return_value = fakes.COMPUTE_NODES
mock_get_svc_by_binary.return_value = fakes.SERVICES
context = 'fake_context'
hm = self.host_manager
inst1 = objects.Instance(uuid=uuids.instance)
cn1 = objects.ComputeNode(host='host1')
hm._instance_info = {'host1': {'instances': {uuids.instance: inst1},
'updated': False}}
host_state = host_manager.HostState('host1', cn1)
self.assertFalse(host_state.instances)
mock_get_by_host.return_value = objects.InstanceList(objects=[inst1])
host_state.update(
inst_dict=hm._get_instance_info(context, cn1))
mock_get_by_host.assert_called_once_with(context, cn1.host)
self.assertTrue(host_state.instances)
self.assertEqual(host_state.instances[uuids.instance], inst1)
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_recreate_instance_info(self, mock_get_by_host):
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
new_inst_list = objects.InstanceList(objects=[inst1, inst2])
mock_get_by_host.return_value = new_inst_list
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': True,
}}
self.host_manager._recreate_instance_info('fake_context', host_name)
new_info = self.host_manager._instance_info[host_name]
self.assertEqual(len(new_info['instances']), len(new_inst_list))
self.assertFalse(new_info['updated'])
def test_update_instance_info(self):
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': False,
}}
inst3 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_3,
host=host_name)
inst4 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_4,
host=host_name)
update = objects.InstanceList(objects=[inst3, inst4])
self.host_manager.update_instance_info('fake_context', host_name,
update)
new_info = self.host_manager._instance_info[host_name]
self.assertEqual(len(new_info['instances']), 4)
self.assertTrue(new_info['updated'])
def test_update_instance_info_unknown_host(self):
self.host_manager._recreate_instance_info = mock.MagicMock()
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': False,
}}
bad_host = 'bad_host'
inst3 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_3,
host=bad_host)
inst_list3 = objects.InstanceList(objects=[inst3])
self.host_manager.update_instance_info('fake_context', bad_host,
inst_list3)
new_info = self.host_manager._instance_info[host_name]
self.host_manager._recreate_instance_info.assert_called_once_with(
'fake_context', bad_host)
self.assertEqual(len(new_info['instances']), len(orig_inst_dict))
self.assertFalse(new_info['updated'])
def test_delete_instance_info(self):
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': False,
}}
self.host_manager.delete_instance_info('fake_context', host_name,
inst1.uuid)
new_info = self.host_manager._instance_info[host_name]
self.assertEqual(len(new_info['instances']), 1)
self.assertTrue(new_info['updated'])
def test_delete_instance_info_unknown_host(self):
self.host_manager._recreate_instance_info = mock.MagicMock()
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': False,
}}
bad_host = 'bad_host'
self.host_manager.delete_instance_info('fake_context', bad_host,
uuids.instance_1)
new_info = self.host_manager._instance_info[host_name]
self.host_manager._recreate_instance_info.assert_called_once_with(
'fake_context', bad_host)
self.assertEqual(len(new_info['instances']), len(orig_inst_dict))
self.assertFalse(new_info['updated'])
def test_sync_instance_info(self):
self.host_manager._recreate_instance_info = mock.MagicMock()
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': False,
}}
self.host_manager.sync_instance_info('fake_context', host_name,
[uuids.instance_2,
uuids.instance_1])
new_info = self.host_manager._instance_info[host_name]
self.assertFalse(self.host_manager._recreate_instance_info.called)
self.assertTrue(new_info['updated'])
def test_sync_instance_info_fail(self):
self.host_manager._recreate_instance_info = mock.MagicMock()
host_name = 'fake_host'
inst1 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_1,
host=host_name)
inst2 = fake_instance.fake_instance_obj('fake_context',
uuid=uuids.instance_2,
host=host_name)
orig_inst_dict = {inst1.uuid: inst1, inst2.uuid: inst2}
self.host_manager._instance_info = {
host_name: {
'instances': orig_inst_dict,
'updated': False,
}}
self.host_manager.sync_instance_info('fake_context', host_name,
[uuids.instance_2,
uuids.instance_1, 'new'])
new_info = self.host_manager._instance_info[host_name]
self.host_manager._recreate_instance_info.assert_called_once_with(
'fake_context', host_name)
self.assertFalse(new_info['updated'])
class HostManagerChangedNodesTestCase(test.NoDBTestCase):
"""Test case for HostManager class."""
@mock.patch.object(host_manager.HostManager, '_init_instance_info')
@mock.patch.object(host_manager.HostManager, '_init_aggregates')
def setUp(self, mock_init_agg, mock_init_inst):
super(HostManagerChangedNodesTestCase, self).setUp()
self.host_manager = host_manager.HostManager()
self.fake_hosts = [
host_manager.HostState('host1', 'node1'),
host_manager.HostState('host2', 'node2'),
host_manager.HostState('host3', 'node3'),
host_manager.HostState('host4', 'node4')
]
@mock.patch('nova.objects.ServiceList.get_by_binary')
@mock.patch('nova.objects.ComputeNodeList.get_all')
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_get_all_host_states(self, mock_get_by_host, mock_get_all,
mock_get_by_binary):
mock_get_by_host.return_value = objects.InstanceList()
mock_get_all.return_value = fakes.COMPUTE_NODES
mock_get_by_binary.return_value = fakes.SERVICES
context = 'fake_context'
self.host_manager.get_all_host_states(context)
host_states_map = self.host_manager.host_state_map
self.assertEqual(len(host_states_map), 4)
@mock.patch('nova.objects.ServiceList.get_by_binary')
@mock.patch('nova.objects.ComputeNodeList.get_all')
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_get_all_host_states_after_delete_one(self, mock_get_by_host,
mock_get_all,
mock_get_by_binary):
getter = (lambda n: n.hypervisor_hostname
if 'hypervisor_hostname' in n else None)
running_nodes = [n for n in fakes.COMPUTE_NODES
if getter(n) != 'node4']
mock_get_by_host.return_value = objects.InstanceList()
mock_get_all.side_effect = [fakes.COMPUTE_NODES, running_nodes]
mock_get_by_binary.side_effect = [fakes.SERVICES, fakes.SERVICES]
context = 'fake_context'
# first call: all nodes
self.host_manager.get_all_host_states(context)
host_states_map = self.host_manager.host_state_map
self.assertEqual(len(host_states_map), 4)
# second call: just running nodes
self.host_manager.get_all_host_states(context)
host_states_map = self.host_manager.host_state_map
self.assertEqual(len(host_states_map), 3)
@mock.patch('nova.objects.ServiceList.get_by_binary')
@mock.patch('nova.objects.ComputeNodeList.get_all')
@mock.patch('nova.objects.InstanceList.get_by_host')
def test_get_all_host_states_after_delete_all(self, mock_get_by_host,
mock_get_all,
mock_get_by_binary):
mock_get_by_host.return_value = objects.InstanceList()
mock_get_all.side_effect = [fakes.COMPUTE_NODES, []]
mock_get_by_binary.side_effect = [fakes.SERVICES, fakes.SERVICES]
context = 'fake_context'
# first call: all nodes
self.host_manager.get_all_host_states(context)
host_states_map = self.host_manager.host_state_map
self.assertEqual(len(host_states_map), 4)
# second call: no nodes
self.host_manager.get_all_host_states(context)
host_states_map = self.host_manager.host_state_map
self.assertEqual(len(host_states_map), 0)
class HostStateTestCase(test.NoDBTestCase):
"""Test case for HostState class."""
# update_from_compute_node() and consume_from_request() are tested
# in HostManagerTestCase.test_get_all_host_states()
@mock.patch('nova.utils.synchronized',
side_effect=lambda a: lambda f: lambda *args: f(*args))
def test_stat_consumption_from_compute_node(self, sync_mock):
stats = {
'num_instances': '5',
'num_proj_12345': '3',
'num_proj_23456': '1',
'num_vm_%s' % vm_states.BUILDING: '2',
'num_vm_%s' % vm_states.SUSPENDED: '1',
'num_task_%s' % task_states.RESIZE_MIGRATING: '1',
'num_task_%s' % task_states.MIGRATING: '2',
'num_os_type_linux': '4',
'num_os_type_windoze': '1',
'io_workload': '42',
}
hyper_ver_int = versionutils.convert_version_to_int('6.0.0')
compute = objects.ComputeNode(
stats=stats, memory_mb=1, free_disk_gb=0, local_gb=0,
local_gb_used=0, free_ram_mb=0, vcpus=0, vcpus_used=0,
disk_available_least=None,
updated_at=datetime.datetime(2015, 11, 11, 11, 0, 0),
host_ip='127.0.0.1', hypervisor_type='htype',
hypervisor_hostname='hostname', cpu_info='cpu_info',
supported_hv_specs=[],
hypervisor_version=hyper_ver_int, numa_topology=None,
pci_device_pools=None, metrics=None,
cpu_allocation_ratio=16.0, ram_allocation_ratio=1.5,
disk_allocation_ratio=1.0)
host = host_manager.HostState("fakehost", "fakenode")
host.update(compute=compute)
sync_mock.assert_called_once_with(("fakehost", "fakenode"))
self.assertEqual(5, host.num_instances)
self.assertEqual(42, host.num_io_ops)
self.assertEqual(10, len(host.stats))
self.assertEqual('127.0.0.1', str(host.host_ip))
self.assertEqual('htype', host.hypervisor_type)
self.assertEqual('hostname', host.hypervisor_hostname)
self.assertEqual('cpu_info', host.cpu_info)
self.assertEqual([], host.supported_instances)
self.assertEqual(hyper_ver_int, host.hypervisor_version)
def test_stat_consumption_from_compute_node_non_pci(self):
stats = {
'num_instances': '5',
'num_proj_12345': '3',
'num_proj_23456': '1',
'num_vm_%s' % vm_states.BUILDING: '2',
'num_vm_%s' % vm_states.SUSPENDED: '1',
'num_task_%s' % task_states.RESIZE_MIGRATING: '1',
'num_task_%s' % task_states.MIGRATING: '2',
'num_os_type_linux': '4',
'num_os_type_windoze': '1',
'io_workload': '42',
}
hyper_ver_int = versionutils.convert_version_to_int('6.0.0')
compute = objects.ComputeNode(
stats=stats, memory_mb=0, free_disk_gb=0, local_gb=0,
local_gb_used=0, free_ram_mb=0, vcpus=0, vcpus_used=0,
disk_available_least=None,
updated_at=datetime.datetime(2015, 11, 11, 11, 0, 0),
host_ip='127.0.0.1', hypervisor_type='htype',
hypervisor_hostname='hostname', cpu_info='cpu_info',
supported_hv_specs=[],
hypervisor_version=hyper_ver_int, numa_topology=None,
pci_device_pools=None, metrics=None,
cpu_allocation_ratio=16.0, ram_allocation_ratio=1.5,
disk_allocation_ratio=1.0)
host = host_manager.HostState("fakehost", "fakenode")
host.update(compute=compute)
self.assertEqual([], host.pci_stats.pools)
self.assertEqual(hyper_ver_int, host.hypervisor_version)
def test_stat_consumption_from_compute_node_rescue_unshelving(self):
stats = {
'num_instances': '5',
'num_proj_12345': '3',
'num_proj_23456': '1',
'num_vm_%s' % vm_states.BUILDING: '2',
'num_vm_%s' % vm_states.SUSPENDED: '1',
'num_task_%s' % task_states.UNSHELVING: '1',
'num_task_%s' % task_states.RESCUING: '2',
'num_os_type_linux': '4',
'num_os_type_windoze': '1',
'io_workload': '42',
}
hyper_ver_int = versionutils.convert_version_to_int('6.0.0')
compute = objects.ComputeNode(
stats=stats, memory_mb=0, free_disk_gb=0, local_gb=0,
local_gb_used=0, free_ram_mb=0, vcpus=0, vcpus_used=0,
disk_available_least=None,
updated_at=datetime.datetime(2015, 11, 11, 11, 0, 0),
host_ip='127.0.0.1', hypervisor_type='htype',
hypervisor_hostname='hostname', cpu_info='cpu_info',
supported_hv_specs=[],
hypervisor_version=hyper_ver_int, numa_topology=None,
pci_device_pools=None, metrics=None,
cpu_allocation_ratio=16.0, ram_allocation_ratio=1.5,
disk_allocation_ratio=1.0)
host = host_manager.HostState("fakehost", "fakenode")
host.update(compute=compute)
self.assertEqual(5, host.num_instances)
self.assertEqual(42, host.num_io_ops)
self.assertEqual(10, len(host.stats))
self.assertEqual([], host.pci_stats.pools)
self.assertEqual(hyper_ver_int, host.hypervisor_version)
@mock.patch('nova.utils.synchronized',
side_effect=lambda a: lambda f: lambda *args: f(*args))
@mock.patch('nova.virt.hardware.get_host_numa_usage_from_instance')
@mock.patch('nova.objects.Instance')
@mock.patch('nova.virt.hardware.numa_fit_instance_to_host')
@mock.patch('nova.virt.hardware.host_topology_and_format_from_host')
def test_stat_consumption_from_instance(self, host_topo_mock,
numa_fit_mock,
instance_init_mock,
numa_usage_mock,
sync_mock):
fake_numa_topology = objects.InstanceNUMATopology(
cells=[objects.InstanceNUMACell()])
fake_host_numa_topology = mock.Mock()
fake_instance = objects.Instance(numa_topology=fake_numa_topology)
host_topo_mock.return_value = (fake_host_numa_topology, True)
numa_usage_mock.return_value = fake_host_numa_topology
numa_fit_mock.return_value = fake_numa_topology
instance_init_mock.return_value = fake_instance
spec_obj = objects.RequestSpec(
instance_uuid=uuids.instance,
flavor=objects.Flavor(root_gb=0, ephemeral_gb=0, memory_mb=0,
vcpus=0),
numa_topology=fake_numa_topology,
pci_requests=objects.InstancePCIRequests(requests=[]))
host = host_manager.HostState("fakehost", "fakenode")
self.assertIsNone(host.updated)
host.consume_from_request(spec_obj)
numa_fit_mock.assert_called_once_with(fake_host_numa_topology,
fake_numa_topology,
limits=None, pci_requests=None,
pci_stats=None)
numa_usage_mock.assert_called_once_with(host, fake_instance)
sync_mock.assert_called_once_with(("fakehost", "fakenode"))
self.assertEqual(fake_host_numa_topology, host.numa_topology)
self.assertIsNotNone(host.updated)
second_numa_topology = objects.InstanceNUMATopology(
cells=[objects.InstanceNUMACell()])
spec_obj = objects.RequestSpec(
instance_uuid=uuids.instance,
flavor=objects.Flavor(root_gb=0, ephemeral_gb=0, memory_mb=0,
vcpus=0),
numa_topology=second_numa_topology,
pci_requests=objects.InstancePCIRequests(requests=[]))
second_host_numa_topology = mock.Mock()
numa_usage_mock.return_value = second_host_numa_topology
numa_fit_mock.return_value = second_numa_topology
host.consume_from_request(spec_obj)
self.assertEqual(2, host.num_instances)
self.assertEqual(2, host.num_io_ops)
self.assertEqual(2, numa_usage_mock.call_count)
self.assertEqual(((host, fake_instance),), numa_usage_mock.call_args)
self.assertEqual(second_host_numa_topology, host.numa_topology)
self.assertIsNotNone(host.updated)
def test_stat_consumption_from_instance_pci(self):
inst_topology = objects.InstanceNUMATopology(
cells = [objects.InstanceNUMACell(
cpuset=set([0]),
memory=512, id=0)])
fake_requests = [{'request_id': uuids.request_id, 'count': 1,
'spec': [{'vendor_id': '8086'}]}]
fake_requests_obj = objects.InstancePCIRequests(
requests=[objects.InstancePCIRequest(**r)
for r in fake_requests],
instance_uuid=uuids.instance)
req_spec = objects.RequestSpec(
instance_uuid=uuids.instance,
project_id='12345',
numa_topology=inst_topology,
pci_requests=fake_requests_obj,
flavor=objects.Flavor(root_gb=0,
ephemeral_gb=0,
memory_mb=512,
vcpus=1))
host = host_manager.HostState("fakehost", "fakenode")
self.assertIsNone(host.updated)
host.pci_stats = pci_stats.PciDeviceStats(
[objects.PciDevicePool(vendor_id='8086',
product_id='15ed',
numa_node=1,
count=1)])
host.numa_topology = fakes.NUMA_TOPOLOGY
host.consume_from_request(req_spec)
self.assertIsInstance(req_spec.numa_topology,
objects.InstanceNUMATopology)
self.assertEqual(512, host.numa_topology.cells[1].memory_usage)
self.assertEqual(1, host.numa_topology.cells[1].cpu_usage)
self.assertEqual(0, len(host.pci_stats.pools))
self.assertIsNotNone(host.updated)
def test_stat_consumption_from_instance_with_pci_exception(self):
fake_requests = [{'request_id': uuids.request_id, 'count': 3,
'spec': [{'vendor_id': '8086'}]}]
fake_requests_obj = objects.InstancePCIRequests(
requests=[objects.InstancePCIRequest(**r)
for r in fake_requests],
instance_uuid=uuids.instance)
req_spec = objects.RequestSpec(
instance_uuid=uuids.instance,
project_id='12345',
numa_topology=None,
pci_requests=fake_requests_obj,
flavor=objects.Flavor(root_gb=0,
ephemeral_gb=0,
memory_mb=1024,
vcpus=1))
host = host_manager.HostState("fakehost", "fakenode")
self.assertIsNone(host.updated)
fake_updated = mock.sentinel.fake_updated
host.updated = fake_updated
host.pci_stats = pci_stats.PciDeviceStats()
with mock.patch.object(host.pci_stats, 'apply_requests',
side_effect=exception.PciDeviceRequestFailed):
host.consume_from_request(req_spec)
self.assertEqual(fake_updated, host.updated)
def test_resources_consumption_from_compute_node(self):
_ts_now = datetime.datetime(2015, 11, 11, 11, 0, 0)
metrics = [
dict(name='cpu.frequency',
value=1.0,
source='source1',
timestamp=_ts_now),
dict(name='numa.membw.current',
numa_membw_values={"0": 10, "1": 43},
source='source2',
timestamp=_ts_now),
]
hyper_ver_int = versionutils.convert_version_to_int('6.0.0')
compute = objects.ComputeNode(
metrics=jsonutils.dumps(metrics),
memory_mb=0, free_disk_gb=0, local_gb=0,
local_gb_used=0, free_ram_mb=0, vcpus=0, vcpus_used=0,
disk_available_least=None,
updated_at=datetime.datetime(2015, 11, 11, 11, 0, 0),
host_ip='127.0.0.1', hypervisor_type='htype',
hypervisor_hostname='hostname', cpu_info='cpu_info',
supported_hv_specs=[],
hypervisor_version=hyper_ver_int,
numa_topology=fakes.NUMA_TOPOLOGY._to_json(),
stats=None, pci_device_pools=None,
cpu_allocation_ratio=16.0, ram_allocation_ratio=1.5,
disk_allocation_ratio=1.0)
host = host_manager.HostState("fakehost", "fakenode")
host.update(compute=compute)
self.assertEqual(len(host.metrics), 2)
self.assertEqual(1.0, host.metrics.to_list()[0]['value'])
self.assertEqual('source1', host.metrics[0].source)
self.assertEqual('cpu.frequency', host.metrics[0].name)
self.assertEqual('numa.membw.current', host.metrics[1].name)
self.assertEqual('source2', host.metrics.to_list()[1]['source'])
self.assertEqual({'0': 10, '1': 43},
host.metrics[1].numa_membw_values)
self.assertIsInstance(host.numa_topology, six.string_types)
def test_stat_consumption_from_compute_node_not_ready(self):
compute = objects.ComputeNode(free_ram_mb=100,
updated_at=None)
host = host_manager.HostState("fakehost", "fakenode")
host._update_from_compute_node(compute)
# Because compute record not ready, the update of free ram
# will not happen and the value will still be 0
self.assertEqual(0, host.free_ram_mb)