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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 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 Chance Scheduler.
"""
import random
import mox
from nova.compute import rpcapi as compute_rpcapi
from nova.compute import utils as compute_utils
from nova.compute import vm_states
from nova.conductor import api as conductor_api
from nova import context
from nova import db
from nova import exception
from nova.scheduler import chance
from nova.scheduler import driver
from nova.tests.scheduler import test_scheduler
class ChanceSchedulerTestCase(test_scheduler.SchedulerTestCase):
"""Test case for Chance Scheduler."""
driver_cls = chance.ChanceScheduler
def test_filter_hosts_avoid(self):
"""Test to make sure _filter_hosts() filters original hosts if
avoid_original_host is True.
"""
hosts = ['host1', 'host2', 'host3']
request_spec = dict(instance_properties=dict(host='host2'))
filter_properties = {'ignore_hosts': ['host2']}
filtered = self.driver._filter_hosts(request_spec, hosts,
filter_properties=filter_properties)
self.assertEqual(filtered, ['host1', 'host3'])
def test_filter_hosts_no_avoid(self):
"""Test to make sure _filter_hosts() does not filter original
hosts if avoid_original_host is False.
"""
hosts = ['host1', 'host2', 'host3']
request_spec = dict(instance_properties=dict(host='host2'))
filter_properties = {'ignore_hosts': []}
filtered = self.driver._filter_hosts(request_spec, hosts,
filter_properties=filter_properties)
self.assertEqual(filtered, hosts)
def test_basic_schedule_run_instance(self):
ctxt = context.RequestContext('fake', 'fake', False)
ctxt_elevated = 'fake-context-elevated'
instance_opts = {'fake_opt1': 'meow', 'launch_index': -1}
instance1 = {'uuid': 'fake-uuid1'}
instance2 = {'uuid': 'fake-uuid2'}
request_spec = {'instance_uuids': ['fake-uuid1', 'fake-uuid2'],
'instance_properties': instance_opts}
def inc_launch_index(*args):
request_spec['instance_properties']['launch_index'] = (
request_spec['instance_properties']['launch_index'] + 1)
self.mox.StubOutWithMock(ctxt, 'elevated')
self.mox.StubOutWithMock(self.driver, 'hosts_up')
self.mox.StubOutWithMock(random, 'choice')
self.mox.StubOutWithMock(driver, 'instance_update_db')
self.mox.StubOutWithMock(compute_rpcapi.ComputeAPI, 'run_instance')
ctxt.elevated().AndReturn(ctxt_elevated)
# instance 1
hosts_full = ['host1', 'host2', 'host3', 'host4']
self.driver.hosts_up(ctxt_elevated, 'compute').AndReturn(hosts_full)
random.choice(hosts_full).AndReturn('host3')
driver.instance_update_db(ctxt, instance1['uuid']).WithSideEffects(
inc_launch_index).AndReturn(instance1)
compute_rpcapi.ComputeAPI.run_instance(ctxt, host='host3',
instance=instance1, requested_networks=None,
injected_files=None, admin_password=None, is_first_time=None,
request_spec=request_spec, filter_properties={})
# instance 2
ctxt.elevated().AndReturn(ctxt_elevated)
self.driver.hosts_up(ctxt_elevated, 'compute').AndReturn(hosts_full)
random.choice(hosts_full).AndReturn('host1')
driver.instance_update_db(ctxt, instance2['uuid']).WithSideEffects(
inc_launch_index).AndReturn(instance2)
compute_rpcapi.ComputeAPI.run_instance(ctxt, host='host1',
instance=instance2, requested_networks=None,
injected_files=None, admin_password=None, is_first_time=None,
request_spec=request_spec, filter_properties={})
self.mox.ReplayAll()
self.driver.schedule_run_instance(ctxt, request_spec,
None, None, None, None, {})
def test_basic_schedule_run_instance_no_hosts(self):
ctxt = context.RequestContext('fake', 'fake', False)
ctxt_elevated = 'fake-context-elevated'
uuid = 'fake-uuid1'
instance_opts = {'fake_opt1': 'meow', 'launch_index': -1}
request_spec = {'instance_uuids': [uuid],
'instance_properties': instance_opts}
self.mox.StubOutWithMock(ctxt, 'elevated')
self.mox.StubOutWithMock(self.driver, 'hosts_up')
self.mox.StubOutWithMock(compute_utils, 'add_instance_fault_from_exc')
self.mox.StubOutWithMock(db, 'instance_update_and_get_original')
# instance 1
ctxt.elevated().AndReturn(ctxt_elevated)
self.driver.hosts_up(ctxt_elevated, 'compute').AndReturn([])
old_ref, new_ref = db.instance_update_and_get_original(ctxt, uuid,
{'vm_state': vm_states.ERROR,
'task_state': None}).AndReturn(({}, {}))
compute_utils.add_instance_fault_from_exc(ctxt,
mox.IsA(conductor_api.LocalAPI), new_ref,
mox.IsA(exception.NoValidHost), mox.IgnoreArg())
self.mox.ReplayAll()
self.driver.schedule_run_instance(
ctxt, request_spec, None, None, None, None, {})
def test_schedule_prep_resize_doesnt_update_host(self):
fake_context = context.RequestContext('user', 'project',
is_admin=True)
def _return_host(*args, **kwargs):
return 'host2'
self.stubs.Set(self.driver, '_schedule', _return_host)
info = {'called': 0}
def _fake_instance_update_db(*args, **kwargs):
# This should not be called
info['called'] = 1
self.stubs.Set(driver, 'instance_update_db',
_fake_instance_update_db)
instance = {'uuid': 'fake-uuid', 'host': 'host1'}
self.driver.schedule_prep_resize(fake_context, {}, {}, {},
instance, {}, None)
self.assertEqual(info['called'], 0)
def test_select_hosts(self):
ctxt = context.RequestContext('fake', 'fake', False)
ctxt_elevated = 'fake-context-elevated'
instance_opts = {'fake_opt1': 'meow', 'launch_index': -1}
request_spec = {'instance_uuids': ['fake-uuid1', 'fake-uuid2'],
'instance_properties': instance_opts}
self.mox.StubOutWithMock(ctxt, 'elevated')
self.mox.StubOutWithMock(self.driver, 'hosts_up')
self.mox.StubOutWithMock(random, 'choice')
ctxt.elevated().AndReturn(ctxt_elevated)
# instance 1
hosts_full = ['host1', 'host2', 'host3', 'host4']
self.driver.hosts_up(ctxt_elevated, 'compute').AndReturn(hosts_full)
random.choice(hosts_full).AndReturn('host3')
# instance 2
ctxt.elevated().AndReturn(ctxt_elevated)
self.driver.hosts_up(ctxt_elevated, 'compute').AndReturn(hosts_full)
random.choice(hosts_full).AndReturn('host1')
self.mox.ReplayAll()
hosts = self.driver.select_hosts(ctxt, request_spec, {})
self.assertEquals(['host3', 'host1'], hosts)
def test_select_hosts_no_valid_host(self):
def _return_no_host(*args, **kwargs):
return []
self.stubs.Set(self.driver, '_schedule', _return_no_host)
self.assertRaises(exception.NoValidHost,
self.driver.select_hosts, self.context, {}, {})
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