129 lines
5.2 KiB
Python
129 lines
5.2 KiB
Python
# Copyright 2013, Red Hat, Inc.
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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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Client side of the scheduler manager RPC API.
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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 nova.objects import base as objects_base
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from nova.openstack.common import jsonutils
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from nova import rpc
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rpcapi_opts = [
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cfg.StrOpt('scheduler_topic',
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default='scheduler',
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help='The topic scheduler nodes listen on'),
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]
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CONF = cfg.CONF
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CONF.register_opts(rpcapi_opts)
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rpcapi_cap_opt = cfg.StrOpt('scheduler',
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help='Set a version cap for messages sent to scheduler services')
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CONF.register_opt(rpcapi_cap_opt, 'upgrade_levels')
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class SchedulerAPI(object):
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'''Client side of the scheduler rpc API.
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API version history:
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1.0 - Initial version.
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1.1 - Changes to prep_resize():
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- remove instance_uuid, add instance
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- remove instance_type_id, add instance_type
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- remove topic, it was unused
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1.2 - Remove topic from run_instance, it was unused
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1.3 - Remove instance_id, add instance to live_migration
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1.4 - Remove update_db from prep_resize
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1.5 - Add reservations argument to prep_resize()
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1.6 - Remove reservations argument to run_instance()
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1.7 - Add create_volume() method, remove topic from live_migration()
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2.0 - Remove 1.x backwards compat
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2.1 - Add image_id to create_volume()
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2.2 - Remove reservations argument to create_volume()
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2.3 - Remove create_volume()
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2.4 - Change update_service_capabilities()
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- accepts a list of capabilities
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2.5 - Add get_backdoor_port()
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2.6 - Add select_hosts()
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... Grizzly supports message version 2.6. So, any changes to existing
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methods in 2.x after that point should be done such that they can
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handle the version_cap being set to 2.6.
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2.7 - Add select_destinations()
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2.8 - Deprecate prep_resize() -- JUST KIDDING. It is still used
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by the compute manager for retries.
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2.9 - Added the legacy_bdm_in_spec parameter to run_instance()
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... Havana supports message version 2.9. So, any changes to existing
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methods in 2.x after that point should be done such that they can
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handle the version_cap being set to 2.9.
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... - Deprecated live_migration() call, moved to conductor
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... - Deprecated select_hosts()
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'''
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VERSION_ALIASES = {
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'grizzly': '2.6',
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'havana': '2.9',
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}
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def __init__(self):
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super(SchedulerAPI, self).__init__()
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target = messaging.Target(topic=CONF.scheduler_topic, version='2.0')
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version_cap = self.VERSION_ALIASES.get(CONF.upgrade_levels.scheduler,
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CONF.upgrade_levels.scheduler)
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serializer = objects_base.NovaObjectSerializer()
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self.client = rpc.get_client(target, version_cap=version_cap,
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serializer=serializer)
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def select_destinations(self, ctxt, request_spec, filter_properties):
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cctxt = self.client.prepare(version='2.7')
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return cctxt.call(ctxt, 'select_destinations',
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request_spec=request_spec, filter_properties=filter_properties)
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def run_instance(self, ctxt, request_spec, admin_password,
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injected_files, requested_networks, is_first_time,
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filter_properties, legacy_bdm_in_spec=True):
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version = '2.0'
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msg_kwargs = {'request_spec': request_spec,
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'admin_password': admin_password,
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'injected_files': injected_files,
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'requested_networks': requested_networks,
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'is_first_time': is_first_time,
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'filter_properties': filter_properties}
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if self.client.can_send_version('2.9'):
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version = '2.9'
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msg_kwargs['legacy_bdm_in_spec'] = legacy_bdm_in_spec
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cctxt = self.client.prepare(version=version)
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return cctxt.cast(ctxt, 'run_instance', **msg_kwargs)
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def prep_resize(self, ctxt, instance, instance_type, image,
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request_spec, filter_properties, reservations):
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instance_p = jsonutils.to_primitive(instance)
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instance_type_p = jsonutils.to_primitive(instance_type)
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reservations_p = jsonutils.to_primitive(reservations)
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image_p = jsonutils.to_primitive(image)
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self.client.cast(ctxt, 'prep_resize',
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instance=instance_p, instance_type=instance_type_p,
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image=image_p, request_spec=request_spec,
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filter_properties=filter_properties,
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reservations=reservations_p)
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