def test_schedule_local_zone(self):
"""Test to make sure _schedule makes no call out to zones if
local_zone in the request spec is True."""
self.next_weight = 1.0
def _fake_weighted_sum(functions, hosts, options):
self.next_weight += 2.0
host, hostinfo = hosts[0]
return least_cost.WeightedHost(self.next_weight,
host=host,
hostinfo=hostinfo)
sched = ds_fakes.FakeDistributedScheduler()
fake_context = context.RequestContext('user', 'project')
sched.zone_manager = ds_fakes.FakeZoneManager()
self.stubs.Set(sched, '_filter_hosts', fake_filter_hosts)
self.stubs.Set(least_cost, 'weighted_sum', _fake_weighted_sum)
self.stubs.Set(nova.db, 'zone_get_all', fake_zone_get_all)
self.stubs.Set(sched, '_call_zone_method', fake_call_zone_method)
instance_type = dict(memory_mb=512, local_gb=512)
request_spec = dict(num_instances=10,
instance_type=instance_type,
local_zone=True)
weighted_hosts = sched._schedule(fake_context, 'compute', request_spec)
self.assertEquals(len(weighted_hosts), 10)
for weighted_host in weighted_hosts:
# There should be no remote hosts
self.assertTrue(weighted_host.host is not None)
self.assertTrue(weighted_host.zone is None)
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_weighted_sum(functions, hosts, options):
self.next_weight += 2.0
host, hostinfo = hosts[0]
return least_cost.WeightedHost(self.next_weight,
host=host,
hostinfo=hostinfo)
sched = ds_fakes.FakeDistributedScheduler()
fake_context = context.RequestContext('user', 'project')
sched.zone_manager = ds_fakes.FakeZoneManager()
self.stubs.Set(sched, '_filter_hosts', fake_filter_hosts)
self.stubs.Set(least_cost, 'weighted_sum', _fake_weighted_sum)
self.stubs.Set(nova.db, 'zone_get_all', fake_zone_get_all)
self.stubs.Set(sched, '_call_zone_method', fake_call_zone_method)
instance_type = dict(memory_mb=512, local_gb=512)
request_spec = dict(num_instances=10, instance_type=instance_type)
weighted_hosts = sched._schedule(fake_context, 'compute', request_spec)
self.assertEquals(len(weighted_hosts), 10)
for weighted_host in weighted_hosts:
# We set this up so remote hosts have even weights ...
if int(weighted_host.weight) % 2 == 0:
self.assertTrue(weighted_host.zone is not None)
self.assertTrue(weighted_host.host is None)
else:
self.assertTrue(weighted_host.host is not None)
self.assertTrue(weighted_host.zone is None)
def test_get_cost_functions(self):
fixture = ds_fakes.FakeDistributedScheduler()
fns = fixture.get_cost_functions()
self.assertEquals(len(fns), 1)
weight, fn = fns[0]
self.assertEquals(weight, 1.0)
hostinfo = zone_manager.HostInfo('host', free_ram_mb=1000)
self.assertEquals(1000, fn(hostinfo))
def test_run_instance_with_blob_hint(self):
"""
Check the local/child zone routing in the run_instance() call.
If the zone_blob hint was passed in, don't re-schedule.
"""
self.schedule_called = False
self.from_blob_called = False
self.locally_called = False
self.child_zone_called = False
def _fake_schedule(*args, **kwargs):
self.schedule_called = True
return least_cost.WeightedHost(1, host='x')
def _fake_make_weighted_host_from_blob(*args, **kwargs):
self.from_blob_called = True
return least_cost.WeightedHost(1, zone='x', blob='y')
def _fake_provision_resource_locally(*args, **kwargs):
self.locally_called = True
return 1
def _fake_ask_child_zone_to_create_instance(*args, **kwargs):
self.child_zone_called = True
return 2
sched = ds_fakes.FakeDistributedScheduler()
self.stubs.Set(sched, '_schedule', _fake_schedule)
self.stubs.Set(sched, '_make_weighted_host_from_blob',
_fake_make_weighted_host_from_blob)
self.stubs.Set(sched, '_provision_resource_locally',
_fake_provision_resource_locally)
self.stubs.Set(sched, '_ask_child_zone_to_create_instance',
_fake_ask_child_zone_to_create_instance)
request_spec = {
'instance_properties': {},
'instance_type': {},
'filter_driver': 'nova.scheduler.host_filter.AllHostsFilter',
'blob': "Non-None blob data",
}
fake_context = context.RequestContext('user', 'project')
instances = sched.schedule_run_instance(fake_context, request_spec)
self.assertTrue(instances)
self.assertFalse(self.schedule_called)
self.assertTrue(self.from_blob_called)
self.assertTrue(self.child_zone_called)
self.assertFalse(self.locally_called)
self.assertEquals(instances, [2])
def test_filter_hosts_no_avoid(self):
"""Test to make sure _filter_hosts() does not filter original
hosts if avoid_original_host is False."""
def _fake_choose_host_filters():
return []
sched = ds_fakes.FakeDistributedScheduler()
fake_context = context.RequestContext('user', 'project')
self.stubs.Set(sched, '_choose_host_filters',
_fake_choose_host_filters)
hosts = [('host1', '1info'), ('host2', '2info'), ('host3', '3info')]
request_spec = dict(original_host='host2', avoid_original_host=False)
filtered = sched._filter_hosts('compute', request_spec, hosts, {})
self.assertEqual(filtered, hosts)
def test_decrypt_blob(self):
"""Test that the decrypt method works."""
fixture = ds_fakes.FakeDistributedScheduler()
test_data = {'weight': 1, 'host': 'x', 'blob': 'y', 'zone': 'z'}
class StubDecryptor(object):
def decryptor(self, key):
return lambda blob: blob
self.stubs.Set(distributed_scheduler, 'crypto', StubDecryptor())
weighted_host = fixture._make_weighted_host_from_blob(
json.dumps(test_data))
self.assertTrue(isinstance(weighted_host, least_cost.WeightedHost))
self.assertEqual(weighted_host.to_dict(),
dict(weight=1, host='x', blob='y', zone='z'))
def test_run_instance_no_hosts(self):
"""
Ensure empty hosts & child_zones result in NoValidHosts exception.
"""
def _fake_empty_call_zone_method(*args, **kwargs):
return []
sched = ds_fakes.FakeDistributedScheduler()
sched.zone_manager = FakeEmptyZoneManager()
self.stubs.Set(sched, '_call_zone_method',
_fake_empty_call_zone_method)
self.stubs.Set(nova.db, 'zone_get_all', fake_zone_get_all)
fake_context = context.RequestContext('user', 'project')
request_spec = dict(instance_type=dict(memory_mb=1, local_gb=1))
self.assertRaises(exception.NoValidHost, sched.schedule_run_instance,
fake_context, request_spec)
def test_adjust_child_weights(self):
"""Make sure the weights returned by child zones are
properly adjusted based on the scale/offset in the zone
db entries.
"""
sched = ds_fakes.FakeDistributedScheduler()
child_results = fake_call_zone_method(None, None, None, None)
zones = fake_zone_get_all(None)
weighted_hosts = sched._adjust_child_weights(child_results, zones)
scaled = [130000, 131000, 132000, 3000]
for weighted_host in weighted_hosts:
w = weighted_host.weight
if weighted_host.zone == 'zone1': # No change
self.assertTrue(w < 1000.0)
if weighted_host.zone == 'zone2': # Offset +1000
self.assertTrue(w >= 1000.0 and w < 2000)
if weighted_host.zone == 'zone3': # Scale x1000
self.assertEqual(scaled.pop(0), w)
def test_run_instance_non_admin(self):
"""Test creating an instance locally using run_instance, passing
a non-admin context. DB actions should work."""
self.was_admin = False
def fake_schedule(context, *args, **kwargs):
# make sure this is called with admin context, even though
# we're using user context below
self.was_admin = context.is_admin
return []
sched = ds_fakes.FakeDistributedScheduler()
self.stubs.Set(sched, '_schedule', fake_schedule)
fake_context = context.RequestContext('user', 'project')
self.assertRaises(exception.NoValidHost, sched.schedule_run_instance,
fake_context, {})
self.assertTrue(self.was_admin)
def test_schedule_no_instance_type(self):
"""Parameter checking."""
sched = ds_fakes.FakeDistributedScheduler()
self.assertRaises(NotImplementedError, sched._schedule, None,
"compute", {})
def test_schedule_bad_topic(self):
"""Parameter checking."""
sched = ds_fakes.FakeDistributedScheduler()
self.assertRaises(NotImplementedError, sched._schedule, None, "foo",
{})
