244 lines
10 KiB
Python
244 lines
10 KiB
Python
# Copyright 2012 IBM Corp.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""Handles all requests to the conductor service."""
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from oslo_config import cfg
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from oslo_log import log as logging
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import oslo_messaging as messaging
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from nova import baserpc
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from nova.conductor import manager
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from nova.conductor import rpcapi
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from nova.i18n import _LI, _LW
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from nova import utils
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conductor_opts = [
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cfg.BoolOpt('use_local',
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default=False,
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help='Perform nova-conductor operations locally'),
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cfg.StrOpt('topic',
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default='conductor',
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help='The topic on which conductor nodes listen'),
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cfg.StrOpt('manager',
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default='nova.conductor.manager.ConductorManager',
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help='Full class name for the Manager for conductor'),
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cfg.IntOpt('workers',
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help='Number of workers for OpenStack Conductor service. '
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'The default will be the number of CPUs available.')
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]
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conductor_group = cfg.OptGroup(name='conductor',
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title='Conductor Options')
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CONF = cfg.CONF
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CONF.register_group(conductor_group)
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CONF.register_opts(conductor_opts, conductor_group)
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LOG = logging.getLogger(__name__)
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class LocalAPI(object):
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"""A local version of the conductor API that does database updates
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locally instead of via RPC.
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"""
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def __init__(self):
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# TODO(danms): This needs to be something more generic for
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# other/future users of this sort of functionality.
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self._manager = utils.ExceptionHelper(manager.ConductorManager())
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def wait_until_ready(self, context, *args, **kwargs):
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# nothing to wait for in the local case.
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pass
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def provider_fw_rule_get_all(self, context):
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return self._manager.provider_fw_rule_get_all(context)
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def compute_node_create(self, context, values):
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return self._manager.compute_node_create(context, values)
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def object_backport(self, context, objinst, target_version):
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return self._manager.object_backport(context, objinst, target_version)
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def object_backport_versions(self, context, objinst, object_versions):
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return self._manager.object_backport_versions(context, objinst,
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object_versions)
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class LocalComputeTaskAPI(object):
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def __init__(self):
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# TODO(danms): This needs to be something more generic for
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# other/future users of this sort of functionality.
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self._manager = utils.ExceptionHelper(
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manager.ComputeTaskManager())
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def resize_instance(self, context, instance, extra_instance_updates,
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scheduler_hint, flavor, reservations,
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clean_shutdown=True):
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# NOTE(comstud): 'extra_instance_updates' is not used here but is
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# needed for compatibility with the cells_rpcapi version of this
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# method.
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self._manager.migrate_server(
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context, instance, scheduler_hint, live=False, rebuild=False,
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flavor=flavor, block_migration=None, disk_over_commit=None,
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reservations=reservations, clean_shutdown=clean_shutdown)
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def live_migrate_instance(self, context, instance, host_name,
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block_migration, disk_over_commit):
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scheduler_hint = {'host': host_name}
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self._manager.migrate_server(
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context, instance, scheduler_hint, True, False, None,
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block_migration, disk_over_commit, None)
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def build_instances(self, context, instances, image,
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filter_properties, admin_password, injected_files,
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requested_networks, security_groups, block_device_mapping,
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legacy_bdm=True):
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utils.spawn_n(self._manager.build_instances, context,
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instances=instances, image=image,
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filter_properties=filter_properties,
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admin_password=admin_password, injected_files=injected_files,
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requested_networks=requested_networks,
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security_groups=security_groups,
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block_device_mapping=block_device_mapping,
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legacy_bdm=legacy_bdm)
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def unshelve_instance(self, context, instance):
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utils.spawn_n(self._manager.unshelve_instance, context,
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instance=instance)
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def rebuild_instance(self, context, instance, orig_image_ref, image_ref,
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injected_files, new_pass, orig_sys_metadata,
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bdms, recreate=False, on_shared_storage=False,
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preserve_ephemeral=False, host=None, kwargs=None):
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# kwargs unused but required for cell compatibility.
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utils.spawn_n(self._manager.rebuild_instance, context,
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instance=instance,
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new_pass=new_pass,
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injected_files=injected_files,
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image_ref=image_ref,
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orig_image_ref=orig_image_ref,
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orig_sys_metadata=orig_sys_metadata,
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bdms=bdms,
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recreate=recreate,
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on_shared_storage=on_shared_storage,
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host=host,
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preserve_ephemeral=preserve_ephemeral)
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class API(LocalAPI):
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"""Conductor API that does updates via RPC to the ConductorManager."""
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def __init__(self):
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self._manager = rpcapi.ConductorAPI()
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self.base_rpcapi = baserpc.BaseAPI(topic=CONF.conductor.topic)
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def wait_until_ready(self, context, early_timeout=10, early_attempts=10):
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'''Wait until a conductor service is up and running.
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This method calls the remote ping() method on the conductor topic until
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it gets a response. It starts with a shorter timeout in the loop
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(early_timeout) up to early_attempts number of tries. It then drops
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back to the globally configured timeout for rpc calls for each retry.
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'''
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attempt = 0
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timeout = early_timeout
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# if we show the timeout message, make sure we show a similar
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# message saying that everything is now working to avoid
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# confusion
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has_timedout = False
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while True:
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# NOTE(danms): Try ten times with a short timeout, and then punt
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# to the configured RPC timeout after that
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if attempt == early_attempts:
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timeout = None
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attempt += 1
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# NOTE(russellb): This is running during service startup. If we
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# allow an exception to be raised, the service will shut down.
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# This may fail the first time around if nova-conductor wasn't
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# running when this service started.
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try:
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self.base_rpcapi.ping(context, '1.21 GigaWatts',
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timeout=timeout)
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if has_timedout:
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LOG.info(_LI('nova-conductor connection '
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'established successfully'))
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break
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except messaging.MessagingTimeout:
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has_timedout = True
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LOG.warning(_LW('Timed out waiting for nova-conductor. '
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'Is it running? Or did this service start '
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'before nova-conductor? '
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'Reattempting establishment of '
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'nova-conductor connection...'))
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class ComputeTaskAPI(object):
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"""ComputeTask API that queues up compute tasks for nova-conductor."""
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def __init__(self):
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self.conductor_compute_rpcapi = rpcapi.ComputeTaskAPI()
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def resize_instance(self, context, instance, extra_instance_updates,
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scheduler_hint, flavor, reservations,
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clean_shutdown=True):
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# NOTE(comstud): 'extra_instance_updates' is not used here but is
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# needed for compatibility with the cells_rpcapi version of this
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# method.
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self.conductor_compute_rpcapi.migrate_server(
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context, instance, scheduler_hint, live=False, rebuild=False,
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flavor=flavor, block_migration=None, disk_over_commit=None,
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reservations=reservations, clean_shutdown=clean_shutdown)
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def live_migrate_instance(self, context, instance, host_name,
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block_migration, disk_over_commit):
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scheduler_hint = {'host': host_name}
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self.conductor_compute_rpcapi.migrate_server(
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context, instance, scheduler_hint, True, False, None,
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block_migration, disk_over_commit, None)
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def build_instances(self, context, instances, image, filter_properties,
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admin_password, injected_files, requested_networks,
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security_groups, block_device_mapping, legacy_bdm=True):
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self.conductor_compute_rpcapi.build_instances(context,
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instances=instances, image=image,
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filter_properties=filter_properties,
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admin_password=admin_password, injected_files=injected_files,
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requested_networks=requested_networks,
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security_groups=security_groups,
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block_device_mapping=block_device_mapping,
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legacy_bdm=legacy_bdm)
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def unshelve_instance(self, context, instance):
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self.conductor_compute_rpcapi.unshelve_instance(context,
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instance=instance)
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def rebuild_instance(self, context, instance, orig_image_ref, image_ref,
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injected_files, new_pass, orig_sys_metadata,
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bdms, recreate=False, on_shared_storage=False,
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preserve_ephemeral=False, host=None, kwargs=None):
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# kwargs unused but required for cell compatibility
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self.conductor_compute_rpcapi.rebuild_instance(context,
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instance=instance,
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new_pass=new_pass,
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injected_files=injected_files,
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image_ref=image_ref,
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orig_image_ref=orig_image_ref,
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orig_sys_metadata=orig_sys_metadata,
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bdms=bdms,
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recreate=recreate,
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on_shared_storage=on_shared_storage,
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preserve_ephemeral=preserve_ephemeral,
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host=host)
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