54 lines
2.0 KiB
Python
54 lines
2.0 KiB
Python
# Copyright 2015 IBM Corporation
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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 neutron.agent.l3.item_allocator import ItemAllocator
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class FipPriority(object):
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def __init__(self, index):
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self.index = index
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def __repr__(self):
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return str(self.index)
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def __hash__(self):
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return hash(self.__repr__())
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def __eq__(self, other):
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if isinstance(other, FipPriority):
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return (self.index == other.index)
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else:
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return False
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class FipRulePriorityAllocator(ItemAllocator):
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"""Manages allocation of floating ips rule priorities.
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IP rule priorities assigned to DVR floating IPs need
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to be preserved over L3 agent restarts.
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This class provides an allocator which saves the priorities
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to a datastore which will survive L3 agent restarts.
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"""
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def __init__(self, data_store_path, priority_rule_start,
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priority_rule_end):
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"""Create the necessary pool and create the item allocator
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using ',' as the delimiter and FipRulePriorityAllocator as the
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class type
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"""
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pool = set(FipPriority(str(s)) for s in range(priority_rule_start,
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priority_rule_end))
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super(FipRulePriorityAllocator, self).__init__(data_store_path,
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FipPriority,
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pool)
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