From: Kyr Shatskyy <kyrylo.shatskyy@clyso.com>
Date: Wed, 31 Jul 2024 21:48:09 +0000 (+0200)
Subject: misc: allow _ssh_keyscan return None again
X-Git-Tag: 1.2.0~3^2
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=refs%2Fpull%2F1990%2Fhead;p=teuthology.git

misc: allow _ssh_keyscan return None again

A host may not have any keys, so _ssh_keyscan should return None,
instead of failing with error:

    IndexError: list index out of range

Fixes: dbd55e37563ce0fde01e1bfa19ca2fd2c03f0194

Signed-off-by: Kyr Shatskyy <kyrylo.shatskyy@clyso.com>
---

diff --git a/teuthology/misc.py b/teuthology/misc.py
index c3d324a4b..97521895a 100644
--- a/teuthology/misc.py
+++ b/teuthology/misc.py
@@ -1127,7 +1127,8 @@ def _ssh_keyscan(hostname):
     for line in p.stdout:
         host, key = line.strip().decode().split(' ', 1)
         keys.append(key)
-    return sorted(keys)[0]
+    if len(keys) > 0:
+        return sorted(keys)[0]
 
 
 def ssh_keyscan_wait(hostname):