def test_schedule_large_host_pool(self):
"""Hosts should still be chosen if pool size
is larger than number of filtered hosts.
"""
sched = fakes.FakeFilterScheduler()
fake_context = context.RequestContext('user', 'project',
is_admin=True)
self.flags(scheduler_host_subset_size=20)
self.stubs.Set(sched.host_manager, 'get_filtered_hosts',
fake_get_filtered_hosts)
fakes.mox_host_manager_db_calls(self.mox, fake_context)
instance_properties = {'project_id': 1,
'root_gb': 512,
'memory_mb': 512,
'ephemeral_gb': 0,
'vcpus': 1,
'os_type': 'Linux'}
request_spec = dict(instance_properties=instance_properties,
instance_type={})
filter_properties = {}
self.mox.ReplayAll()
hosts = sched._schedule(self.context, request_spec,
filter_properties=filter_properties)
# one host should be chose
self.assertEqual(len(hosts), 1)
def test_schedule_chooses_best_host(self):
"""If scheduler_host_subset_size is 1, the largest host with greatest
weight should be returned.
"""
self.flags(scheduler_host_subset_size=1)
sched = fakes.FakeFilterScheduler()
fake_context = context.RequestContext('user', 'project',
is_admin=True)
self.stubs.Set(sched.host_manager, 'get_filtered_hosts',
fake_get_filtered_hosts)
fakes.mox_host_manager_db_calls(self.mox, fake_context)
self.next_weight = 50
def _fake_weigh_objects(_self, functions, hosts, options):
this_weight = self.next_weight
self.next_weight = 0
host_state = hosts[0]
return [weights.WeighedHost(host_state, this_weight)]
instance_properties = {'project_id': 1,
'root_gb': 512,
'memory_mb': 512,
'ephemeral_gb': 0,
'vcpus': 1,
'os_type': 'Linux'}
request_spec = dict(instance_properties=instance_properties,
instance_type={})
self.stubs.Set(weights.HostWeightHandler,
'get_weighed_objects', _fake_weigh_objects)
filter_properties = {}
self.mox.ReplayAll()
hosts = sched._schedule(self.context, request_spec,
filter_properties=filter_properties)
# one host should be chosen
self.assertEqual(1, len(hosts))
self.assertEqual(50, hosts[0].weight)
def test_select_destinations(self):
"""select_destinations is basically a wrapper around _schedule().
Similar to the _schedule tests, this just does a happy path test to
ensure there is nothing glaringly wrong.
"""
self.next_weight = 1.0
selected_hosts = []
selected_nodes = []
def _fake_weigh_objects(_self, functions, hosts, options):
self.next_weight += 2.0
host_state = hosts[0]
selected_hosts.append(host_state.host)
selected_nodes.append(host_state.nodename)
return [weights.WeighedHost(host_state, self.next_weight)]
sched = fakes.FakeFilterScheduler()
fake_context = context.RequestContext('user', 'project',
is_admin=True)
self.stubs.Set(sched.host_manager, 'get_filtered_hosts',
fake_get_filtered_hosts)
self.stubs.Set(weights.HostWeightHandler,
'get_weighed_objects', _fake_weigh_objects)
fakes.mox_host_manager_db_calls(self.mox, fake_context)
request_spec = {'instance_type': {'memory_mb': 512, 'root_gb': 512,
'ephemeral_gb': 0,
'vcpus': 1},
'instance_properties': {'project_id': 1,
'root_gb': 512,
'memory_mb': 512,
'ephemeral_gb': 0,
'vcpus': 1,
'os_type': 'Linux'},
'num_instances': 1}
self.mox.ReplayAll()
dests = sched.select_destinations(fake_context, request_spec, {})
(host, node) = (dests[0]['host'], dests[0]['nodename'])
self.assertEqual(host, selected_hosts[0])
self.assertEqual(node, selected_nodes[0])
def test_schedule_happy_day(self):
"""Make sure there's nothing glaringly wrong with _schedule()
by doing a happy day pass through.
"""
self.next_weight = 1.0
def _fake_weigh_objects(_self, functions, hosts, options):
self.next_weight += 2.0
host_state = hosts[0]
return [weights.WeighedHost(host_state, self.next_weight)]
sched = fakes.FakeFilterScheduler()
fake_context = context.RequestContext('user', 'project',
is_admin=True)
self.stubs.Set(sched.host_manager, 'get_filtered_hosts',
fake_get_filtered_hosts)
self.stubs.Set(weights.HostWeightHandler,
'get_weighed_objects', _fake_weigh_objects)
fakes.mox_host_manager_db_calls(self.mox, fake_context)
request_spec = {'num_instances': 10,
'instance_type': {'memory_mb': 512, 'root_gb': 512,
'ephemeral_gb': 0,
'vcpus': 1},
'instance_properties': {'project_id': 1,
'root_gb': 512,
'memory_mb': 512,
'ephemeral_gb': 0,
'vcpus': 1,
'os_type': 'Linux'}}
self.mox.ReplayAll()
weighed_hosts = sched._schedule(fake_context, request_spec, {})
self.assertEqual(len(weighed_hosts), 10)
for weighed_host in weighed_hosts:
self.assertIsNotNone(weighed_host.obj)
def test_basic_schedule_run_instances_anti_affinity(self):
filter_properties = {'scheduler_hints':
{'group': 'cats'}}
# Request spec 1
instance_opts1 = {'project_id': 1, 'os_type': 'Linux',
'memory_mb': 512, 'root_gb': 512,
'ephemeral_gb': 0, 'vcpus': 1,
'system_metadata': {'system': 'metadata'}}
request_spec1 = {'instance_uuids': ['fake-uuid1-1', 'fake-uuid1-2'],
'instance_properties': instance_opts1,
'instance_type': {'memory_mb': 512, 'root_gb': 512,
'ephemeral_gb': 0, 'vcpus': 1}}
self.next_weight = 1.0
def _fake_weigh_objects(_self, functions, hosts, options):
self.next_weight += 2.0
host_state = hosts[0]
return [weights.WeighedHost(host_state, self.next_weight)]
sched = fakes.FakeFilterScheduler()
fake_context = context.RequestContext('user', 'project',
is_admin=True)
self.stubs.Set(sched.host_manager, 'get_filtered_hosts',
fake_get_group_filtered_hosts)
self.stubs.Set(weights.HostWeightHandler,
'get_weighed_objects', _fake_weigh_objects)
fakes.mox_host_manager_db_calls(self.mox, fake_context)
self.mox.StubOutWithMock(driver, 'instance_update_db')
self.mox.StubOutWithMock(compute_rpcapi.ComputeAPI, 'run_instance')
self.mox.StubOutWithMock(sched, 'group_hosts')
instance1_1 = {'uuid': 'fake-uuid1-1'}
instance1_2 = {'uuid': 'fake-uuid1-2'}
sched.group_hosts(mox.IgnoreArg(), 'cats').AndReturn([])
def inc_launch_index1(*args, **kwargs):
request_spec1['instance_properties']['launch_index'] = (
request_spec1['instance_properties']['launch_index'] + 1)
expected_metadata = {'system_metadata':
{'system': 'metadata', 'group': 'cats'}}
driver.instance_update_db(fake_context, instance1_1['uuid'],
extra_values=expected_metadata).WithSideEffects(
inc_launch_index1).AndReturn(instance1_1)
compute_rpcapi.ComputeAPI.run_instance(fake_context, host='host3',
instance=instance1_1, requested_networks=None,
injected_files=None, admin_password=None, is_first_time=None,
request_spec=request_spec1, filter_properties=mox.IgnoreArg(),
node='node3', legacy_bdm_in_spec=False)
driver.instance_update_db(fake_context, instance1_2['uuid'],
extra_values=expected_metadata).WithSideEffects(
inc_launch_index1).AndReturn(instance1_2)
compute_rpcapi.ComputeAPI.run_instance(fake_context, host='host4',
instance=instance1_2, requested_networks=None,
injected_files=None, admin_password=None, is_first_time=None,
request_spec=request_spec1, filter_properties=mox.IgnoreArg(),
node='node4', legacy_bdm_in_spec=False)
self.mox.ReplayAll()
sched.schedule_run_instance(fake_context, request_spec1,
None, None, None, None, filter_properties, False)