ac33ad9ec9
oslo.i18n provides the i18n function that were provided by oslo-incubator's gettextutils module. Change-Id: I1f361a8321fb02f03b4f3f3e2ef688fcf19514a3
245 lines
11 KiB
Python
245 lines
11 KiB
Python
# Copyright (c) 2010 OpenStack Foundation
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# Copyright 2010 United States Government as represented by the
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# Administrator of the National Aeronautics and Space Administration.
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# All Rights Reserved.
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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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"""
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Scheduler Service
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"""
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from oslo.config import cfg
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from oslo import messaging
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from cinder import context
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from cinder import db
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from cinder import exception
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from cinder import flow_utils
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from cinder.i18n import _
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from cinder import manager
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from cinder.openstack.common import excutils
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from cinder.openstack.common import importutils
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from cinder.openstack.common import log as logging
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from cinder import quota
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from cinder import rpc
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from cinder.scheduler.flows import create_volume
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from cinder.volume import rpcapi as volume_rpcapi
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scheduler_driver_opt = cfg.StrOpt('scheduler_driver',
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default='cinder.scheduler.filter_scheduler.'
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'FilterScheduler',
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help='Default scheduler driver to use')
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CONF = cfg.CONF
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CONF.register_opt(scheduler_driver_opt)
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QUOTAS = quota.QUOTAS
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LOG = logging.getLogger(__name__)
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class SchedulerManager(manager.Manager):
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"""Chooses a host to create volumes."""
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RPC_API_VERSION = '1.5'
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target = messaging.Target(version=RPC_API_VERSION)
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def __init__(self, scheduler_driver=None, service_name=None,
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*args, **kwargs):
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if not scheduler_driver:
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scheduler_driver = CONF.scheduler_driver
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if scheduler_driver in ['cinder.scheduler.chance.ChanceScheduler',
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'cinder.scheduler.simple.SimpleScheduler']:
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scheduler_driver = ('cinder.scheduler.filter_scheduler.'
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'FilterScheduler')
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LOG.deprecated(_('ChanceScheduler and SimpleScheduler have been '
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'deprecated due to lack of support for advanced '
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'features like: volume types, volume encryption,'
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' QoS etc. These two schedulers can be fully '
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'replaced by FilterScheduler with certain '
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'combination of filters and weighers.'))
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self.driver = importutils.import_object(scheduler_driver)
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super(SchedulerManager, self).__init__(*args, **kwargs)
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def init_host(self):
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ctxt = context.get_admin_context()
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self.request_service_capabilities(ctxt)
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def update_service_capabilities(self, context, service_name=None,
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host=None, capabilities=None, **kwargs):
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"""Process a capability update from a service node."""
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if capabilities is None:
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capabilities = {}
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self.driver.update_service_capabilities(service_name,
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host,
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capabilities)
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def create_volume(self, context, topic, volume_id, snapshot_id=None,
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image_id=None, request_spec=None,
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filter_properties=None):
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try:
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flow_engine = create_volume.get_flow(context,
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db, self.driver,
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request_spec,
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filter_properties,
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volume_id,
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snapshot_id,
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image_id)
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except Exception:
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LOG.exception(_("Failed to create scheduler manager volume flow"))
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raise exception.CinderException(
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_("Failed to create scheduler manager volume flow"))
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with flow_utils.DynamicLogListener(flow_engine, logger=LOG):
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flow_engine.run()
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def request_service_capabilities(self, context):
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volume_rpcapi.VolumeAPI().publish_service_capabilities(context)
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def migrate_volume_to_host(self, context, topic, volume_id, host,
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force_host_copy, request_spec,
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filter_properties=None):
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"""Ensure that the host exists and can accept the volume."""
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def _migrate_volume_set_error(self, context, ex, request_spec):
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volume_state = {'volume_state': {'migration_status': None}}
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self._set_volume_state_and_notify('migrate_volume_to_host',
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volume_state,
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context, ex, request_spec)
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try:
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tgt_host = self.driver.host_passes_filters(context, host,
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request_spec,
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filter_properties)
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except exception.NoValidHost as ex:
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_migrate_volume_set_error(self, context, ex, request_spec)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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_migrate_volume_set_error(self, context, ex, request_spec)
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else:
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volume_ref = db.volume_get(context, volume_id)
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volume_rpcapi.VolumeAPI().migrate_volume(context, volume_ref,
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tgt_host,
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force_host_copy)
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def retype(self, context, topic, volume_id,
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request_spec, filter_properties=None):
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"""Schedule the modification of a volume's type.
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:param context: the request context
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:param topic: the topic listened on
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:param volume_id: the ID of the volume to retype
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:param request_spec: parameters for this retype request
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:param filter_properties: parameters to filter by
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"""
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def _retype_volume_set_error(self, context, ex, request_spec,
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volume_ref, msg, reservations):
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if reservations:
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QUOTAS.rollback(context, reservations)
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if (volume_ref['instance_uuid'] is None and
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volume_ref['attached_host'] is None):
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orig_status = 'available'
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else:
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orig_status = 'in-use'
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volume_state = {'volume_state': {'status': orig_status}}
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self._set_volume_state_and_notify('retype', volume_state,
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context, ex, request_spec, msg)
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volume_ref = db.volume_get(context, volume_id)
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reservations = request_spec.get('quota_reservations')
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new_type = request_spec.get('volume_type')
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if new_type is None:
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msg = _('New volume type not specified in request_spec.')
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ex = exception.ParameterNotFound(param='volume_type')
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_retype_volume_set_error(self, context, ex, request_spec,
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volume_ref, msg, reservations)
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# Default migration policy is 'never'
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migration_policy = request_spec.get('migration_policy')
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if not migration_policy:
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migration_policy = 'never'
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try:
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tgt_host = self.driver.find_retype_host(context, request_spec,
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filter_properties,
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migration_policy)
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except exception.NoValidHost as ex:
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msg = (_("Could not find a host for volume %(volume_id)s with "
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"type %(type_id)s.") %
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{'type_id': new_type['id'], 'volume_id': volume_id})
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_retype_volume_set_error(self, context, ex, request_spec,
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volume_ref, msg, reservations)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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_retype_volume_set_error(self, context, ex, request_spec,
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volume_ref, None, reservations)
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else:
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volume_rpcapi.VolumeAPI().retype(context, volume_ref,
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new_type['id'], tgt_host,
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migration_policy, reservations)
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def manage_existing(self, context, topic, volume_id,
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request_spec, filter_properties=None):
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"""Ensure that the host exists and can accept the volume."""
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def _manage_existing_set_error(self, context, ex, request_spec):
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volume_state = {'volume_state': {'status': 'error'}}
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self._set_volume_state_and_notify('manage_existing', volume_state,
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context, ex, request_spec)
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volume_ref = db.volume_get(context, volume_id)
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try:
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self.driver.host_passes_filters(context,
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volume_ref['host'],
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request_spec,
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filter_properties)
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except exception.NoValidHost as ex:
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_manage_existing_set_error(self, context, ex, request_spec)
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except Exception as ex:
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with excutils.save_and_reraise_exception():
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_manage_existing_set_error(self, context, ex, request_spec)
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else:
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volume_rpcapi.VolumeAPI().manage_existing(context, volume_ref,
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request_spec.get('ref'))
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def _set_volume_state_and_notify(self, method, updates, context, ex,
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request_spec, msg=None):
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# TODO(harlowja): move into a task that just does this later.
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if not msg:
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msg = (_("Failed to schedule_%(method)s: %(ex)s") %
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{'method': method, 'ex': ex})
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LOG.error(msg)
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volume_state = updates['volume_state']
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properties = request_spec.get('volume_properties', {})
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volume_id = request_spec.get('volume_id', None)
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if volume_id:
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db.volume_update(context, volume_id, volume_state)
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payload = dict(request_spec=request_spec,
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volume_properties=properties,
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volume_id=volume_id,
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state=volume_state,
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method=method,
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reason=ex)
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rpc.get_notifier("scheduler").error(context,
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'scheduler.' + method,
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payload)
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