cephfs-shell: assert python3

There's little reason to support this new tool with python2.

Fixes: http://tracker.ceph.com/issues/40418
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>
(cherry picked from commit de429c48c45add1fcf16b1e019e9598af48bb8f5)

diff --git a/src/tools/cephfs/cephfs-shell b/src/tools/cephfs/cephfs-shell
index 32a5b7367750d9ff960a8c47f9ff216dc0b3a46f..03999a004a2b581acc42cc6790691c455d60ca2a 100644 (file)
--- a/src/tools/cephfs/cephfs-shell
+++ b/src/tools/cephfs/cephfs-shell
@@ -15,6 +15,9 @@ import math
 import re
 import shlex
 
+if sys.version_info.major < 3:
+   raise RuntimeError("cephfs-shell is only compatible with python3")
+
 try:
     from cmd2 import with_argparser
 except ImportError: