55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
# Copyright 2015 Mirantis 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_config import cfg
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from manila import context
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from manila.db import api as db_api
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from manila.scheduler.weighers import base_host
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from manila.share import utils
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pool_weight_opts = [
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cfg.FloatOpt('pool_weight_multiplier',
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default=1.0,
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help='Multiplier used for weighing pools which have '
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'existing share servers. Negative numbers mean to spread'
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' vs stack.'),
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]
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CONF = cfg.CONF
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CONF.register_opts(pool_weight_opts)
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class PoolWeigher(base_host.BaseHostWeigher):
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def weight_multiplier(self):
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"""Override the weight multiplier."""
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return CONF.pool_weight_multiplier
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def _weigh_object(self, host_state, weight_properties):
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"""Pools with existing share server win."""
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pool_mapping = weight_properties.get('server_pools_mapping', {})
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if not pool_mapping:
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return 0
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ctx = context.get_admin_context()
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host = utils.extract_host(host_state.host, 'backend')
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servers = db_api.share_server_get_all_by_host(ctx, host)
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pool = utils.extract_host(host_state.host, 'pool')
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for server in servers:
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if any(pool == p['pool_name'] for p in pool_mapping.get(
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server['id'], [])):
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return 1
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return 0
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