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OpenStack Study: metrics_filter.py**** CubicPower OpenStack Study ****
# Copyright (c) 2014 Intel, Inc. # 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. from oslo.config import cfg from nova.openstack.common.gettextutils import _ from nova.openstack.common import log as logging from nova.scheduler import filters from nova.scheduler import utils LOG = logging.getLogger(__name__) CONF = cfg.CONF CONF.import_opt('weight_setting', 'nova.scheduler.weights.metrics', group='metrics')
**** CubicPower OpenStack Study **** class MetricsFilter(filters.BaseHostFilter): """Metrics Filter This filter is used to filter out those hosts which don't have the corresponding metrics so these the metrics weigher won't fail due to these hosts. """
**** CubicPower OpenStack Study **** def __init__(self): super(MetricsFilter, self).__init__() opts = utils.parse_options(CONF.metrics.weight_setting, sep='=', converter=float, name="metrics.weight_setting") self.keys = [x[0] for x in opts]
**** CubicPower OpenStack Study **** def host_passes(self, host_state, filter_properties): unavail = [i for i in self.keys if i not in host_state.metrics] if unavail: LOG.debug(_("%(host_state)s does not have the following " "metrics: %(metrics)s"), {'host_state': host_state, 'metrics': ', '.join(unavail)}) return len(unavail) == 0
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