def restore_data(storage, path=''):
""" Restores the Cassandra backup.
Args:
storage: A str, one of the StorageTypes class members.
path: A str, the name of the backup file to restore from.
Returns:
True on success, False otherwise.
"""
if storage not in StorageTypes().get_storage_types():
logging.error("Storage '{0}' not supported.")
return False
logging.info("Starting new db restore.")
if storage == StorageTypes.GCS:
# Download backup file and store locally with a fixed name.
if not gcs_helper.download_from_bucket(path,
CASSANDRA_BACKUP_FILE_LOCATION):
logging.error("Download from GCS failed. Aborting recovery...")
return False
# TODO Make sure there's a snapshot to rollback to if restore fails.
# Not pressing for fresh deployments.
# create_snapshot('rollback-snapshot')
if not shut_down_cassandra.run():
logging.error("Unable to shut down Cassandra. Aborting restore...")
if storage == StorageTypes.GCS:
backup_recovery_helper.\
delete_local_backup_file(CASSANDRA_BACKUP_FILE_LOCATION)
return False
remove_old_data()
try:
backup_recovery_helper.untar_backup_files(CASSANDRA_BACKUP_FILE_LOCATION)
except backup_exceptions.BRException as br_exception:
logging.exception("Error while unpacking backup files. Exception: {0}".
format(str(br_exception)))
start_cassandra.run()
if storage == StorageTypes.GCS:
backup_recovery_helper.\
delete_local_backup_file(CASSANDRA_BACKUP_FILE_LOCATION)
return False
restore_snapshots()
# Start Cassandra and repair.
logging.info("Starting Cassandra.")
start_cassandra.run()
refresh_data()
# Local cleanup.
clear_old_snapshots()
if storage == StorageTypes.GCS:
backup_recovery_helper.\
delete_local_backup_file(CASSANDRA_BACKUP_FILE_LOCATION)
logging.info("Done with db restore.")
return True
def shutdown_datastore():
""" Top level function for bringing down Cassandra.
Returns:
True on success, False otherwise.
"""
success = shut_down_cassandra.run()
if not success:
return False
return True
def shutdown_datastore():
""" Top level function for bringing down Cassandra.
Returns:
True on success, False otherwise.
"""
logging.info("Shutting down Cassandra.")
if not shut_down_cassandra.run():
return False
return True
