49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
"""
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Copyright (c) 2014 ThoughtWorks
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Copyright (c) 2016 Platform9 Systems Inc.
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All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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from nova import db
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from nova.openstack.common import log as logging
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from nova.scheduler import filters
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from oslo.config import cfg
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opts = [
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cfg.BoolOpt('cloud_burst', help='Switch to enable could bursting'),
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cfg.StrOpt(
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'cloud_burst_availability_zone',
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help='Availability zone of compute hosts with the public cloud driver'
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),
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]
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CONF = cfg.CONF
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CONF.register_opts(opts)
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LOG = logging.getLogger(__name__)
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class CloudBurstFilter(filters.BaseHostFilter):
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"""Filter for cloud burst availability zone"""
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run_filter_once_per_request = True
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def host_passes(self, host_state, filter_properties):
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context = filter_properties['context'].elevated()
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metadata = db.aggregate_metadata_get_by_host(context, host_state.host,
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key='availability_zone')
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if CONF.cloud_burst:
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return CONF.cloud_burst_availability_zone in metadata[
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'availability_zone']
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return CONF.cloud_burst_availability_zone not in metadata[
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'availability_zone']
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