import errno
import logging
+from ganeti import compat
from ganeti import errors
from ganeti import constants
from ganeti import utils
SSCONF_LOCK_TIMEOUT = 10
#: Valid ssconf keys
-_VALID_KEYS = frozenset([
+_VALID_KEYS = compat.UniqueFrozenset([
constants.SS_CLUSTER_NAME,
constants.SS_CLUSTER_TAGS,
constants.SS_FILE_STORAGE_DIR,