55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
# Copyright (c) 2014 Intel, Inc.
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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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from oslo_log import log as logging
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import nova.conf
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from nova.scheduler import filters
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from nova.scheduler import utils
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LOG = logging.getLogger(__name__)
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CONF = nova.conf.CONF
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class MetricsFilter(filters.BaseHostFilter):
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"""Metrics Filter
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This filter is used to filter out those hosts which don't have the
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corresponding metrics so these the metrics weigher won't fail due to
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these hosts.
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"""
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RUN_ON_REBUILD = False
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def __init__(self):
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super(MetricsFilter, self).__init__()
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opts = utils.parse_options(CONF.metrics.weight_setting,
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sep='=',
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converter=float,
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name="metrics.weight_setting")
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self.keys = set([x[0] for x in opts])
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def host_passes(self, host_state, spec_obj):
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metrics_on_host = set(m.name for m in host_state.metrics)
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if not self.keys.issubset(metrics_on_host):
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unavail = metrics_on_host - self.keys
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LOG.debug("%(host_state)s does not have the following "
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"metrics: %(metrics)s",
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{'host_state': host_state,
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'metrics': ', '.join(unavail)})
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return False
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return True
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