From 3958ecb5c7308422fbf963ce496f89f506cd90da Mon Sep 17 00:00:00 2001
From: Samuel Davidson <samueldavidson@google.com>
Date: Mon, 15 Jun 2020 11:42:05 -0700
Subject: [PATCH] Fix to configure-kubeapiserver.sh error.

It no no longer errors and exits if
env-var OLD_LOAD_BALANCER_IP is undefined.
---
 cluster/gce/gci/configure-kubeapiserver.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cluster/gce/gci/configure-kubeapiserver.sh b/cluster/gce/gci/configure-kubeapiserver.sh
index 94d665e84ae..7b4e10631e8 100644
--- a/cluster/gce/gci/configure-kubeapiserver.sh
+++ b/cluster/gce/gci/configure-kubeapiserver.sh
@@ -84,7 +84,7 @@ function start-kube-apiserver {
   params+=" --tls-private-key-file=${APISERVER_SERVER_KEY_PATH}"
   if [[ -n "${OLD_MASTER_IP:-}" ]]; then
     local old_ips="${OLD_MASTER_IP}"
-    if [[ -n "${OLD_LOAD_BALANCER_IP}" ]]; then
+    if [[ -n "${OLD_LOAD_BALANCER_IP:-}" ]]; then
       old_ips+=",${OLD_LOAD_BALANCER_IP}"
     fi
     params+=" --tls-sni-cert-key=${OLD_MASTER_CERT_PATH},${OLD_MASTER_KEY_PATH}:${old_ips}"