From e8dcc42c09f0f34a94abb433cdf3daebfd8b21c9 Mon Sep 17 00:00:00 2001
From: Tobias Henkel <tobias.henkel@bmw.de>
Date: Tue, 8 Jan 2019 15:56:40 +0100
Subject: [PATCH] Default ssh keys to empty list

If the node doesn't have ssh keys defined we currently rely on
nodepool adding an empty list of ssh keys. Instead be safe and default
to an empty list.

Change-Id: I1cbac643f47923b18959153f318d3d2fdc9626cd
---
 zuul/executor/server.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/zuul/executor/server.py b/zuul/executor/server.py
index 0917f54ab1..71f1c8a315 100644
--- a/zuul/executor/server.py
+++ b/zuul/executor/server.py
@@ -1269,7 +1269,7 @@ class AnsibleJob(object):
                                 self.winrm_read_timeout
 
                 host_keys = []
-                for key in node.get('host_keys'):
+                for key in node.get('host_keys', []):
                     if port != 22:
                         host_keys.append("[%s]:%s %s" % (ip, port, key))
                     else: