81 lines
2.8 KiB
Python
81 lines
2.8 KiB
Python
# (c) Copyright 2015,2016 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from oslo_log import log
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from freezer.mode import mode
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from freezer.utils import config
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from freezer.utils import utils
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from freezer.utils import winutils
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LOG = log.getLogger(__name__)
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class SqlserverMode(mode.Mode):
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"""
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Execute a SQL Server DB backup. Currently only backups with shadow
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copy are supported. This mean, as soon as the shadow copy is created
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the db writes will be blocked and a checkpoint will be created, as soon
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as the backup finish the db will be unlocked and the backup will be
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uploaded. A sql_server.conf_file is required for this operation.
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"""
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def __init__(self, conf):
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self.released = False
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with open(conf.sql_server_conf, 'r') as sql_conf_file_fd:
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self.sql_server_instance = \
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config.ini_parse(sql_conf_file_fd)["instance"]
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@property
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def name(self):
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return "sqlserver"
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@property
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def version(self):
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return "1.0"
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def stop_sql_server(self):
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""" Stop a SQL Server instance to
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perform the backup of the db files """
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LOG.info('Stopping SQL Server for backup')
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with winutils.DisableFileSystemRedirection():
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cmd = 'net stop "SQL Server ({0})"'\
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.format(self.sql_server_instance)
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(out, err) = utils.create_subprocess(cmd)
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if err != '':
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raise Exception('Error while stopping SQL Server,'
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', error {0}'.format(err))
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def start_sql_server(self):
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""" Start the SQL Server instance after the backup is completed """
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with winutils.DisableFileSystemRedirection():
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cmd = 'net start "SQL Server ({0})"'.format(
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self.sql_server_instance)
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(out, err) = utils.create_subprocess(cmd)
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if err != '':
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raise Exception('Error while starting SQL Server'
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', error {0}'.format(err))
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LOG.info('SQL Server back to normal')
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def prepare(self):
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self.stop_sql_server()
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self.released = False
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def release(self):
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if not self.released:
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self.released = True
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self.start_sql_server()
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