58 lines
1.9 KiB
Python
58 lines
1.9 KiB
Python
# Copyright (c) 2014 Cisco Systems, 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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"""Rack network cost."""
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from nova.openstack.common import log as logging
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from nova.scheduler.solvers import costs as solvercosts
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from oslo.config import cfg
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class RackNetworkAffinityCost(solvercosts.BaseCost):
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"""The cost is evaluated by the existence of
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requested networks in racks.
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"""
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def get_cost_matrix(self, hosts, instance_uuids, request_spec,
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filter_properties):
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"""Calculate the cost matrix."""
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num_hosts = len(hosts)
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if instance_uuids:
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num_instances = len(instance_uuids)
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else:
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num_instances = request_spec.get('num_instances', 1)
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costs = [[0 for j in range(num_instances)]
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for i in range(num_hosts)]
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requested_networks = filter_properties.get('requested_networks', None)
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if requested_networks is None:
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return costs
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for i in range(num_hosts):
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host_cost = 0
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for network_id, requested_ip, port_id in requested_networks:
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if network_id:
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if network_id in sum(hosts[i].rack_networks.values(), []):
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host_cost -= 1
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costs[i] = [host_cost for j in range(num_instances)]
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return costs
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