78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
# Copyright 2014 Tesora, 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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#
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import abc
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from trove.common.strategies.strategy import Strategy
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class Replication(Strategy, metaclass=abc.ABCMeta):
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"""Base class for Replication Strategy implementation."""
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__strategy_type__ = 'replication'
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__strategy_ns__ = 'trove.guestagent.strategies.replication'
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def __init__(self):
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super(Replication, self).__init__()
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@abc.abstractmethod
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def get_master_ref(self, service, snapshot_info):
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"""Get reference to master site for replication strategy."""
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def backup_required_for_replication(self):
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"""Indicates whether a backup is required for replication."""
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return True
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@abc.abstractmethod
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def snapshot_for_replication(self, context, service, adm, location,
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snapshot_info):
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"""Capture snapshot of master db."""
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@abc.abstractmethod
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def enable_as_master(self, service, master_config):
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"""Configure underlying database to act as master for replication."""
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@abc.abstractmethod
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def enable_as_slave(self, service, master_info, slave_config):
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"""Configure underlying database as a slave of the given master."""
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@abc.abstractmethod
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def detach_slave(self, service, for_failover):
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"""Turn off replication on a slave site."""
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@abc.abstractmethod
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def cleanup_source_on_replica_detach(self, service, replica_info):
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"""Clean up the source on the detach of a replica."""
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@abc.abstractmethod
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def demote_master(self, service):
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"""Turn off replication on a master site."""
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@property
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def repl_backup_runner(self):
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"""Backup runner to be used to snapshot for replication"""
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return None
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@property
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def repl_incr_backup_runner(self):
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"""Incremental backup runner to be used to snapshot for replication"""
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return None
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@property
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def repl_backup_extra_opts(self):
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"""Extra options to be passed to the backup agent"""
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return None
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