b3f7e6facf
If one volume was failed to get scheduled, removing such volume should also clean up reservation. Also when create_volume is ready to send to scheduler, reservation should be committed no matter backend can successfully create that volume or not since deleting volume call will do a minus reservation even on volume with 'error' status. This change updates RPC API to version 2.2 Fix bug 1052052 Change-Id: Ia632a0e49318d534f0acbd3df5c9f6bb86eefa2a
98 lines
4.0 KiB
Python
98 lines
4.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright (c) 2010 OpenStack, LLC.
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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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Simple Scheduler - for Volumes
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Note: Deprecated in Folsom. Will be removed along with nova-volumes
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"""
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from nova.common import deprecated
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from nova import db
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from nova import exception
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from nova import flags
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from nova.openstack.common import cfg
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from nova.scheduler import chance
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from nova.scheduler import driver
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from nova import utils
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simple_scheduler_opts = [
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cfg.IntOpt("max_gigabytes",
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default=10000,
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help="maximum number of volume gigabytes to allow per host"),
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]
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FLAGS = flags.FLAGS
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FLAGS.register_opts(simple_scheduler_opts)
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class SimpleScheduler(chance.ChanceScheduler):
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"""Implements Naive Scheduler that tries to find least loaded host."""
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def schedule_run_instance(self, context, request_spec, admin_password,
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injected_files, requested_networks,
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is_first_time, filter_properties):
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deprecated.warn(_('SimpleScheduler now only covers volume scheduling '
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'and is deprecated in Folsom. Non-volume functionality in '
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'SimpleScheduler has been replaced by FilterScheduler'))
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super(SimpleScheduler, self).schedule_run_instance(context,
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request_spec, admin_password, injected_files,
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requested_networks, is_first_time, filter_properties)
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def schedule_create_volume(self, context, volume_id, snapshot_id,
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image_id):
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"""Picks a host that is up and has the fewest volumes."""
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deprecated.warn(_('nova-volume functionality is deprecated in Folsom '
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'and will be removed in Grizzly. Volumes are now handled '
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'by Cinder'))
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elevated = context.elevated()
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volume_ref = db.volume_get(context, volume_id)
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availability_zone = volume_ref.get('availability_zone')
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zone, host = None, None
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if availability_zone:
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zone, _x, host = availability_zone.partition(':')
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if host and context.is_admin:
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service = db.service_get_by_args(elevated, host, 'nova-volume')
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if not utils.service_is_up(service):
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raise exception.WillNotSchedule(host=host)
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driver.cast_to_volume_host(context, host, 'create_volume',
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volume_id=volume_id, snapshot_id=snapshot_id,
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image_id=image_id)
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return None
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results = db.service_get_all_volume_sorted(elevated)
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if zone:
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results = [(service, gigs) for (service, gigs) in results
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if service['availability_zone'] == zone]
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for result in results:
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(service, volume_gigabytes) = result
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if volume_gigabytes + volume_ref['size'] > FLAGS.max_gigabytes:
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msg = _("Not enough allocatable volume gigabytes remaining")
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raise exception.NoValidHost(reason=msg)
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if utils.service_is_up(service) and not service['disabled']:
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driver.cast_to_volume_host(context, service['host'],
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'create_volume', volume_id=volume_id,
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snapshot_id=snapshot_id, image_id=image_id)
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return None
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msg = _("Is the appropriate service running?")
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raise exception.NoValidHost(reason=msg)
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