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# Copyright 2020 Catalyst Cloud
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
from oslo_config import cfg
from oslo_log import log as logging
from oslo_utils import importutils
topdir = os.path.normpath(
os.path.join(os.path.abspath(sys.argv[0]), os.pardir, os.pardir))
sys.path.insert(0, topdir)
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
cli_opts = [
cfg.StrOpt('backup-id'),
cfg.StrOpt(
'storage-driver',
default='swift',
choices=['swift']
),
cfg.StrOpt(
'driver',
default='innobackupex',
choices=['innobackupex', 'mariabackup', 'pg_basebackup', 'xtrabackup']
),
cfg.BoolOpt('backup'),
cfg.StrOpt(
'backup-encryption-key',
help='This is only for backward compatibility. The backups '
'created prior to Victoria may be encrypted. Trove guest '
'agent is responsible for passing the key.'
),
cfg.StrOpt('db-user'),
cfg.StrOpt('db-password'),
cfg.StrOpt('db-host'),
cfg.StrOpt('db-datadir'),
cfg.StrOpt('os-token'),
cfg.StrOpt('os-auth-url'),
cfg.StrOpt('os-tenant-id'),
cfg.StrOpt('swift-container', default='database_backups'),
cfg.DictOpt('swift-extra-metadata'),
cfg.StrOpt('restore-from'),
cfg.StrOpt('restore-checksum'),
cfg.BoolOpt('incremental'),
cfg.StrOpt('parent-location'),
cfg.StrOpt(
'parent-checksum',
help='It is up to the storage driver to decide to validate the '
'checksum or not. '
),
cfg.StrOpt('pg-wal-archive-dir'),
]
driver_mapping = {
'innobackupex': 'backup.drivers.innobackupex.InnoBackupEx',
'innobackupex_inc': 'backup.drivers.innobackupex.InnoBackupExIncremental',
'mariabackup': 'backup.drivers.mariabackup.MariaBackup',
'mariabackup_inc': 'backup.drivers.mariabackup.MariaBackupIncremental',
'pg_basebackup': 'backup.drivers.postgres.PgBasebackup',
'pg_basebackup_inc': 'backup.drivers.postgres.PgBasebackupIncremental',
'xtrabackup': 'backup.drivers.xtrabackup.XtraBackup',
'xtrabackup_inc': 'backup.drivers.xtrabackup.XtraBackupIncremental'
}
storage_mapping = {
'swift': 'backup.storage.swift.SwiftStorage',
}
def stream_backup_to_storage(runner_cls, storage):
parent_metadata = {}
extra_params = {}
if CONF.incremental:
if not CONF.parent_location:
LOG.error('--parent-location should be provided for incremental '
'backup')
exit(1)
parent_metadata = storage.load_metadata(CONF.parent_location,
CONF.parent_checksum)
parent_metadata.update(
{
'parent_location': CONF.parent_location,
'parent_checksum': CONF.parent_checksum
}
)
if CONF.pg_wal_archive_dir:
extra_params['wal_archive_dir'] = CONF.pg_wal_archive_dir
extra_params.update(parent_metadata)
try:
with runner_cls(filename=CONF.backup_id, **extra_params) as bkup:
checksum, location = storage.save(
bkup,
metadata=CONF.swift_extra_metadata,
container=CONF.swift_container
)
LOG.info('Backup successfully, checksum: %s, location: %s',
checksum, location)
except Exception as err:
LOG.exception('Failed to call stream_backup_to_storage, error: %s',
err)
def stream_restore_from_storage(runner_cls, storage):
params = {
'storage': storage,
'location': CONF.restore_from,
'checksum': CONF.restore_checksum,
'wal_archive_dir': CONF.pg_wal_archive_dir,
'lsn': None
}
if storage.is_incremental_backup(CONF.restore_from):
params['lsn'] = storage.get_backup_lsn(CONF.restore_from)
try:
runner = runner_cls(**params)
restore_size = runner.restore()
LOG.info('Restore successfully, restore_size: %s', restore_size)
except Exception as err:
LOG.exception('Failed to call stream_restore_from_storage, error: %s',
err)
def main():
CONF.register_cli_opts(cli_opts)
logging.register_options(CONF)
CONF(sys.argv[1:], project='trove-backup')
logging.setup(CONF, 'trove-backup')
runner_cls = importutils.import_class(driver_mapping[CONF.driver])
storage = importutils.import_class(storage_mapping[CONF.storage_driver])()
if CONF.backup:
if CONF.incremental:
runner_cls = importutils.import_class(
driver_mapping['%s_inc' % CONF.driver])
LOG.info('Starting backup database to %s, backup ID %s',
CONF.storage_driver, CONF.backup_id)
stream_backup_to_storage(runner_cls, storage)
else:
if storage.is_incremental_backup(CONF.restore_from):
LOG.debug('Restore from incremental backup')
runner_cls = importutils.import_class(
driver_mapping['%s_inc' % CONF.driver])
LOG.info('Starting restore database from %s, location: %s',
CONF.storage_driver, CONF.restore_from)
stream_restore_from_storage(runner_cls, storage)
if __name__ == '__main__':
sys.exit(main())
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