77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
# 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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"""
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Policy for placing nodes across AZs and/or regions.
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NOTE: How placement policy works
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Input:
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cluster: cluster whose nodes are to be manipulated.
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action.data['placement']:
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- count: number of nodes to create; it can be decision from a scaling
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policy. If no scaling policy is in effect, the count will be
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assumed to be 1.
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Output:
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stored in action.data: A dictionary containing scheduling decisions made.
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{
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'status': 'OK',
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'placement': {
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'count': 2,
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'placements': [
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{
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'AZ': 'nova-1',
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'region': 'RegionOne',
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},
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{
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'AZ': 'nova-2',
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'region': 'RegionTwo',
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}
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]
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}
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}
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"""
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from senlin.common import consts
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from senlin.policies import base
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class PlacementPolicy(base.Policy):
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'''Policy for placing members of a cluster.
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This policy is expected to be enforced before new member(s) added to an
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existing cluster.
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'''
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VERSION = '1.0'
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TARGET = [
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('BEFORE', consts.CLUSTER_SCALE_OUT),
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]
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PROFILE_TYPE = [
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'os.nova.server',
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]
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properties_schema = {
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}
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def __init__(self, name, spec, **kwargs):
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super(PlacementPolicy, self).__init__(name, spec, **kwargs)
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self.regions = self.properties.get('regions')
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self.AZs = self.properties.get('availability_zones')
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def pre_op(self, cluster_id, action):
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'''Call back when new nodes are created for a cluster.'''
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# TODO(anyone): calculate available AZs and or regions
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return
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