From bc0985d70c1baa361f8d76d2f6e8fec000405f7f Mon Sep 17 00:00:00 2001
From: Kevin Fenzi <kevin@scrye.com>
Date: Tue, 5 Jul 2016 20:33:08 +0000
Subject: [PATCH] Work around locking issue in known_hosts.

---
 tasks/persistent_cloud.yml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tasks/persistent_cloud.yml b/tasks/persistent_cloud.yml
index 91c41f01fa..0405b321d1 100644
--- a/tasks/persistent_cloud.yml
+++ b/tasks/persistent_cloud.yml
@@ -73,9 +73,12 @@
   ignore_errors: True
   register: hostkey
   when: host_is_up|failed
-
+#
+# Set serial: 1 here due to locking bug with known_hosts
+#
 - name: add new ssh host key (you still need to add it to official ssh_host_keys later)
-  local_action: known_hosts path={{item}} key="{{ hostkey.stdout }}" host={{ inventory_hostname }} state=present
+  local_action: known_hosts path={{ item }} key={{ hostkey.stdout }} host={{ inventory_hostname }} state=present
+  serial: 1
   ignore_errors: True
   with_items:
   - /root/.ssh/known_hosts