From 36b2f2dd045b23b69b9349504b0b4483d6095fa8 Mon Sep 17 00:00:00 2001
From: Marc Cyprien <marc.cyprien@esigetel.net>
Date: Thu, 21 May 2015 16:16:53 +0200
Subject: [PATCH] PR for
 [#8559](https://github.com/GoogleCloudPlatform/kubernetes/issues/8559)

---
 cluster/ubuntu/util.sh | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/cluster/ubuntu/util.sh b/cluster/ubuntu/util.sh
index 0f4322665bb..0d4806ee027 100755
--- a/cluster/ubuntu/util.sh
+++ b/cluster/ubuntu/util.sh
@@ -75,7 +75,24 @@ function setClusterInfo() {
 
 # Verify ssh prereqs
 function verify-prereqs {
-   # Expect at least one identity to be available.
+  local rc
+
+  rc=0
+  ssh-add -L 1> /dev/null 2> /dev/null || rc="$?"
+  # "Could not open a connection to your authentication agent."
+  if [[ "${rc}" -eq 2 ]]; then
+    eval "$(ssh-agent)" > /dev/null
+    trap-add "kill ${SSH_AGENT_PID}" EXIT
+  fi
+
+  rc=0
+  ssh-add -L 1> /dev/null 2> /dev/null || rc="$?"
+  # "The agent has no identities."
+  if [[ "${rc}" -eq 1 ]]; then
+    # Try adding one of the default identities, with or without passphrase.
+    ssh-add || true
+  fi 
+  # Expect at least one identity to be available.
   if ! ssh-add -L 1> /dev/null 2> /dev/null; then
     echo "Could not find or add an SSH identity."
     echo "Please start ssh-agent, add your identity, and retry."