65 lines
2.2 KiB
Python
65 lines
2.2 KiB
Python
# Copyright (c) 2011 Openstack, LLC.
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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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Handles all requests relating to schedulers.
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"""
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from nova import flags
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from nova import log as logging
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from nova import rpc
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FLAGS = flags.FLAGS
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LOG = logging.getLogger('nova.scheduler.api')
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def _call_scheduler(method, context, params=None):
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"""Generic handler for RPC calls to the scheduler.
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:param params: Optional dictionary of arguments to be passed to the
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scheduler worker
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:retval: Result returned by scheduler worker
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"""
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if not params:
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params = {}
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queue = FLAGS.scheduler_topic
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kwargs = {'method': method, 'args': params}
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return rpc.call(context, queue, kwargs)
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def get_zone_list(context):
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"""Return a list of zones assoicated with this zone."""
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items = _call_scheduler('get_zone_list', context)
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for item in items:
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item['api_url'] = item['api_url'].replace('\\/', '/')
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return items
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def get_zone_capabilities(context, service=None):
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"""Returns a dict of key, value capabilities for this zone,
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or for a particular class of services running in this zone."""
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return _call_scheduler('get_zone_capabilities', context=context,
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params=dict(service=service))
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def update_service_capabilities(context, service_name, host, capabilities):
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"""Send an update to all the scheduler services informing them
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of the capabilities of this service."""
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kwargs = dict(method='update_service_capabilities',
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args=dict(service_name=service_name, host=host,
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capabilities=capabilities))
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return rpc.fanout_cast(context, 'scheduler', kwargs)
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