d1ed5376aa
Like with the compute RPC API, we're unlikely to still work well with RPC client using older 1.x version because of DB schema changes. In that case, we may as well remove 1.x support in Folsom and rip out the potentially buggy backwards compat code. This should also make backporting fixes from Grizzly easier. Deployers following trunk can upgrade all their nodes to use the version 2.0 API before deploying this commit. Change-Id: Iee099751bda9637da5e134357d28e89d5fba9895
98 lines
4.1 KiB
Python
98 lines
4.1 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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reservations):
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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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reservations=reservations)
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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, reservations=reservations)
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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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