1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
|
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (c) 2010 OpenStack Foundation
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# 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.
"""
Scheduler Service
"""
from oslo.config import cfg
from nova.compute import rpcapi as compute_rpcapi
from nova.compute import task_states
from nova.compute import utils as compute_utils
from nova.compute import vm_states
from nova.conductor import api as conductor_api
from nova.conductor.tasks import live_migrate
import nova.context
from nova import exception
from nova import manager
from nova.openstack.common import excutils
from nova.openstack.common import importutils
from nova.openstack.common import jsonutils
from nova.openstack.common import log as logging
from nova.openstack.common import periodic_task
from nova.openstack.common.rpc import common as rpc_common
from nova import quota
from nova.scheduler import utils as scheduler_utils
LOG = logging.getLogger(__name__)
scheduler_driver_opt = cfg.StrOpt('scheduler_driver',
default='nova.scheduler.filter_scheduler.FilterScheduler',
help='Default driver to use for the scheduler')
CONF = cfg.CONF
CONF.register_opt(scheduler_driver_opt)
QUOTAS = quota.QUOTAS
class SchedulerManager(manager.Manager):
"""Chooses a host to run instances on."""
RPC_API_VERSION = '2.6'
def __init__(self, scheduler_driver=None, *args, **kwargs):
if not scheduler_driver:
scheduler_driver = CONF.scheduler_driver
self.driver = importutils.import_object(scheduler_driver)
super(SchedulerManager, self).__init__(service_name='scheduler',
*args, **kwargs)
def post_start_hook(self):
"""After we start up and can receive messages via RPC, tell all
compute nodes to send us their capabilities.
"""
ctxt = nova.context.get_admin_context()
compute_rpcapi.ComputeAPI().publish_service_capabilities(ctxt)
def update_service_capabilities(self, context, service_name,
host, capabilities):
"""Process a capability update from a service node."""
if not isinstance(capabilities, list):
capabilities = [capabilities]
for capability in capabilities:
if capability is None:
capability = {}
self.driver.update_service_capabilities(service_name, host,
capability)
def create_volume(self, context, volume_id, snapshot_id,
reservations=None, image_id=None):
#function removed in RPC API 2.3
pass
@rpc_common.client_exceptions(exception.NoValidHost,
exception.ComputeServiceUnavailable,
exception.InvalidHypervisorType,
exception.UnableToMigrateToSelf,
exception.DestinationHypervisorTooOld,
exception.InvalidLocalStorage,
exception.InvalidSharedStorage,
exception.MigrationPreCheckError)
def live_migration(self, context, instance, dest,
block_migration, disk_over_commit):
try:
self._schedule_live_migration(context, instance, dest,
block_migration, disk_over_commit)
except (exception.NoValidHost,
exception.ComputeServiceUnavailable,
exception.InvalidHypervisorType,
exception.UnableToMigrateToSelf,
exception.DestinationHypervisorTooOld,
exception.InvalidLocalStorage,
exception.InvalidSharedStorage,
exception.MigrationPreCheckError) as ex:
request_spec = {'instance_properties': {
'uuid': instance['uuid'], },
}
with excutils.save_and_reraise_exception():
self._set_vm_state_and_notify('live_migration',
dict(vm_state=instance['vm_state'],
task_state=None,
expected_task_state=task_states.MIGRATING,),
context, ex, request_spec)
except Exception as ex:
request_spec = {'instance_properties': {
'uuid': instance['uuid'], },
}
with excutils.save_and_reraise_exception():
self._set_vm_state_and_notify('live_migration',
{'vm_state': vm_states.ERROR},
context, ex, request_spec)
def _schedule_live_migration(self, context, instance, dest,
block_migration, disk_over_commit):
task = live_migrate.LiveMigrationTask(context, instance,
dest, block_migration, disk_over_commit,
self.driver.select_hosts)
return task.execute()
def run_instance(self, context, request_spec, admin_password,
injected_files, requested_networks, is_first_time,
filter_properties):
"""Tries to call schedule_run_instance on the driver.
Sets instance vm_state to ERROR on exceptions
"""
instance_uuids = request_spec['instance_uuids']
with compute_utils.EventReporter(context, conductor_api.LocalAPI(),
'schedule', *instance_uuids):
try:
return self.driver.schedule_run_instance(context,
request_spec, admin_password, injected_files,
requested_networks, is_first_time, filter_properties)
except exception.NoValidHost as ex:
# don't re-raise
self._set_vm_state_and_notify('run_instance',
{'vm_state': vm_states.ERROR,
'task_state': None},
context, ex, request_spec)
except Exception as ex:
with excutils.save_and_reraise_exception():
self._set_vm_state_and_notify('run_instance',
{'vm_state': vm_states.ERROR,
'task_state': None},
context, ex, request_spec)
def prep_resize(self, context, image, request_spec, filter_properties,
instance, instance_type, reservations):
"""Tries to call schedule_prep_resize on the driver.
Sets instance vm_state to ACTIVE on NoHostFound
Sets vm_state to ERROR on other exceptions
"""
instance_uuid = instance['uuid']
with compute_utils.EventReporter(context, conductor_api.LocalAPI(),
'schedule', instance_uuid):
try:
kwargs = {
'context': context,
'image': image,
'request_spec': request_spec,
'filter_properties': filter_properties,
'instance': instance,
'instance_type': instance_type,
'reservations': reservations,
}
return self.driver.schedule_prep_resize(**kwargs)
except exception.NoValidHost as ex:
self._set_vm_state_and_notify('prep_resize',
{'vm_state': vm_states.ACTIVE,
'task_state': None},
context, ex, request_spec)
if reservations:
QUOTAS.rollback(context, reservations)
except Exception as ex:
with excutils.save_and_reraise_exception():
self._set_vm_state_and_notify('prep_resize',
{'vm_state': vm_states.ERROR,
'task_state': None},
context, ex, request_spec)
if reservations:
QUOTAS.rollback(context, reservations)
def _set_vm_state_and_notify(self, method, updates, context, ex,
request_spec):
scheduler_utils.set_vm_state_and_notify(
context, 'scheduler', method, updates, ex, request_spec, self.db)
# NOTE(hanlind): This method can be removed in v3.0 of the RPC API.
def show_host_resources(self, context, host):
"""Shows the physical/usage resource given by hosts.
:param context: security context
:param host: hostname
:returns:
example format is below::
{'resource':D, 'usage':{proj_id1:D, proj_id2:D}}
D: {'vcpus': 3, 'memory_mb': 2048, 'local_gb': 2048,
'vcpus_used': 12, 'memory_mb_used': 10240,
'local_gb_used': 64}
"""
# Getting compute node info and related instances info
service_ref = self.db.service_get_by_compute_host(context, host)
instance_refs = self.db.instance_get_all_by_host(context,
service_ref['host'])
# Getting total available/used resource
compute_ref = service_ref['compute_node'][0]
resource = {'vcpus': compute_ref['vcpus'],
'memory_mb': compute_ref['memory_mb'],
'local_gb': compute_ref['local_gb'],
'vcpus_used': compute_ref['vcpus_used'],
'memory_mb_used': compute_ref['memory_mb_used'],
'local_gb_used': compute_ref['local_gb_used']}
usage = dict()
if not instance_refs:
return {'resource': resource, 'usage': usage}
# Getting usage resource per project
project_ids = [i['project_id'] for i in instance_refs]
project_ids = list(set(project_ids))
for project_id in project_ids:
vcpus = [i['vcpus'] for i in instance_refs
if i['project_id'] == project_id]
mem = [i['memory_mb'] for i in instance_refs
if i['project_id'] == project_id]
root = [i['root_gb'] for i in instance_refs
if i['project_id'] == project_id]
ephemeral = [i['ephemeral_gb'] for i in instance_refs
if i['project_id'] == project_id]
usage[project_id] = {'vcpus': sum(vcpus),
'memory_mb': sum(mem),
'root_gb': sum(root),
'ephemeral_gb': sum(ephemeral)}
return {'resource': resource, 'usage': usage}
@periodic_task.periodic_task
def _expire_reservations(self, context):
QUOTAS.expire(context)
# NOTE(russellb) This method can be removed in 3.0 of this API. It is
# deprecated in favor of the method in the base API.
def get_backdoor_port(self, context):
return self.backdoor_port
@rpc_common.client_exceptions(exception.NoValidHost)
def select_hosts(self, context, request_spec, filter_properties):
"""Returns host(s) best suited for this request_spec
and filter_properties.
"""
hosts = self.driver.select_hosts(context, request_spec,
filter_properties)
return jsonutils.to_primitive(hosts)
|
