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
103 lines
4.3 KiB
Python
103 lines
4.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
|
|
# Copyright (c) 2010 OpenStack, LLC.
|
|
# 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.
|
|
|
|
"""
|
|
Chance (Random) Scheduler implementation
|
|
"""
|
|
|
|
import random
|
|
|
|
from nova import exception
|
|
from nova import flags
|
|
from nova.scheduler import driver
|
|
|
|
FLAGS = flags.FLAGS
|
|
|
|
|
|
class ChanceScheduler(driver.Scheduler):
|
|
"""Implements Scheduler as a random node selector."""
|
|
|
|
def _filter_hosts(self, request_spec, hosts, filter_properties):
|
|
"""Filter a list of hosts based on request_spec."""
|
|
|
|
ignore_hosts = filter_properties.get('ignore_hosts', [])
|
|
hosts = [host for host in hosts if host not in ignore_hosts]
|
|
return hosts
|
|
|
|
def _schedule(self, context, topic, request_spec, filter_properties):
|
|
"""Picks a host that is up at random."""
|
|
|
|
elevated = context.elevated()
|
|
hosts = self.hosts_up(elevated, topic)
|
|
if not hosts:
|
|
msg = _("Is the appropriate service running?")
|
|
raise exception.NoValidHost(reason=msg)
|
|
|
|
hosts = self._filter_hosts(request_spec, hosts, filter_properties)
|
|
if not hosts:
|
|
msg = _("Could not find another compute")
|
|
raise exception.NoValidHost(reason=msg)
|
|
|
|
return hosts[int(random.random() * len(hosts))]
|
|
|
|
def schedule_run_instance(self, context, request_spec,
|
|
admin_password, injected_files,
|
|
requested_networks, is_first_time,
|
|
filter_properties):
|
|
"""Create and run an instance or instances"""
|
|
instance_uuids = request_spec.get('instance_uuids')
|
|
for num, instance_uuid in enumerate(instance_uuids):
|
|
request_spec['instance_properties']['launch_index'] = num
|
|
try:
|
|
host = self._schedule(context, 'compute', request_spec,
|
|
filter_properties)
|
|
updated_instance = driver.instance_update_db(context,
|
|
instance_uuid, host)
|
|
self.compute_rpcapi.run_instance(context,
|
|
instance=updated_instance, host=host,
|
|
requested_networks=requested_networks,
|
|
injected_files=injected_files,
|
|
admin_password=admin_password,
|
|
is_first_time=is_first_time,
|
|
request_spec=request_spec,
|
|
filter_properties=filter_properties)
|
|
except Exception as ex:
|
|
# NOTE(vish): we don't reraise the exception here to make sure
|
|
# that all instances in the request get set to
|
|
# error properly
|
|
driver.handle_schedule_error(context, ex, instance_uuid,
|
|
request_spec)
|
|
|
|
def schedule_prep_resize(self, context, image, request_spec,
|
|
filter_properties, instance, instance_type,
|
|
reservations):
|
|
"""Select a target for resize."""
|
|
host = self._schedule(context, 'compute', request_spec,
|
|
filter_properties)
|
|
self.compute_rpcapi.prep_resize(context, image, instance,
|
|
instance_type, host, reservations)
|
|
|
|
def schedule_create_volume(self, context, volume_id, snapshot_id,
|
|
image_id):
|
|
"""Picks a host that is up at random."""
|
|
host = self._schedule(context, FLAGS.volume_topic, None, {})
|
|
driver.cast_to_host(context, FLAGS.volume_topic, host, 'create_volume',
|
|
volume_id=volume_id, snapshot_id=snapshot_id,
|
|
image_id=image_id)
|