138 lines
4.9 KiB
Python
138 lines
4.9 KiB
Python
# Copyright 2020 Catalyst Cloud
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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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import re
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from oslo_concurrency import processutils
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from oslo_config import cfg
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from oslo_log import log as logging
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from backup.drivers import mysql_base
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LOG = logging.getLogger(__name__)
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CONF = cfg.CONF
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class InnoBackupEx(mysql_base.MySQLBaseRunner):
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"""Implementation of Backup and Restore for InnoBackupEx."""
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backup_log = '/tmp/innobackupex.log'
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prepare_log = '/tmp/prepare.log'
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restore_cmd = ('xbstream -x -C %(restore_location)s --parallel=2'
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' 2>/tmp/xbstream_extract.log')
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prepare_cmd = ('innobackupex'
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' --defaults-file=%(restore_location)s/backup-my.cnf'
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' --ibbackup=xtrabackup'
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' --apply-log'
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' %(restore_location)s'
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' 2>' + prepare_log)
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@property
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def cmd(self):
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cmd = ('innobackupex'
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' --stream=xbstream'
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' --parallel=2 ' +
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self.user_and_pass + ' %s' % self.default_data_dir +
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' 2>' + self.backup_log
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)
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return cmd + self.zip_cmd + self.encrypt_cmd
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def check_restore_process(self):
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"""Check whether xbstream restore is successful."""
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LOG.info('Checking return code of xbstream restore process.')
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return_code = self.process.wait()
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if return_code != 0:
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LOG.error('xbstream exited with %s', return_code)
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return False
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with open('/tmp/xbstream_extract.log', 'r') as xbstream_log:
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for line in xbstream_log:
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# Ignore empty lines
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if not line.strip():
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continue
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LOG.error('xbstream restore failed with: %s',
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line.rstrip('\n'))
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return False
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return True
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def post_restore(self):
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"""Hook that is called after the restore command."""
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LOG.info("Running innobackupex prepare: %s.", self.prepare_command)
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processutils.execute(self.prepare_command, shell=True)
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LOG.info("Checking innobackupex prepare log")
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with open(self.prepare_log, 'r') as prepare_log:
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output = prepare_log.read()
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if not output:
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msg = "innobackupex prepare log file empty"
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raise Exception(msg)
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last_line = output.splitlines()[-1].strip()
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if not re.search('completed OK!', last_line):
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msg = "innobackupex prepare did not complete successfully"
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raise Exception(msg)
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class InnoBackupExIncremental(InnoBackupEx):
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"""InnoBackupEx incremental backup."""
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incremental_prep = ('innobackupex'
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' --defaults-file=%(restore_location)s/backup-my.cnf'
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' --ibbackup=xtrabackup'
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' --apply-log'
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' --redo-only'
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' %(restore_location)s'
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' %(incremental_args)s'
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' 2>/tmp/innoprepare.log')
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def __init__(self, *args, **kwargs):
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if not kwargs.get('lsn'):
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raise AttributeError('lsn attribute missing')
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self.parent_location = kwargs.pop('parent_location', '')
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self.parent_checksum = kwargs.pop('parent_checksum', '')
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self.restore_content_length = 0
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super(InnoBackupExIncremental, self).__init__(*args, **kwargs)
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@property
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def cmd(self):
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cmd = ('innobackupex'
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' --stream=xbstream'
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' --incremental'
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' --incremental-lsn=%(lsn)s ' +
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self.user_and_pass + ' %s' % self.default_data_dir +
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' 2>' + self.backup_log)
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return cmd + self.zip_cmd + self.encrypt_cmd
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def get_metadata(self):
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_meta = super(InnoBackupExIncremental, self).get_metadata()
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_meta.update({
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'parent_location': self.parent_location,
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'parent_checksum': self.parent_checksum,
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})
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return _meta
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def run_restore(self):
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"""Run incremental restore.
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First grab all parents and prepare them with '--redo-only'. After
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all backups are restored the super class InnoBackupEx post_restore
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method is called to do the final prepare with '--apply-log'
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"""
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LOG.debug('Running incremental restore')
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self.incremental_restore(self.location, self.checksum)
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return self.restore_content_length
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