From ee6d69bbc10d0db18bbbc1e7e40a9f8dd59350f3 Mon Sep 17 00:00:00 2001
From: Lantao Liu <lantaol@google.com>
Date: Thu, 14 Mar 2019 13:10:15 -0700
Subject: [PATCH] Set default "" to extra runtime handler.

Signed-off-by: Lantao Liu <lantaol@google.com>
---
 contrib/gce/configure.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/contrib/gce/configure.sh b/contrib/gce/configure.sh
index 9ed09da93..6dc35ea40 100755
--- a/contrib/gce/configure.sh
+++ b/contrib/gce/configure.sh
@@ -181,6 +181,8 @@ disabled_plugins = ["restart"]
 EOF
 chmod 644 "${config_path}"
 
+# CONTAINERD_EXTRA_RUNTIME_HANDLER is the extra runtime handler to install.
+CONTAINERD_EXTRA_RUNTIME_HANDLER=${CONTAINERD_EXTRA_RUNTIME_HANDLER:-""}
 if [[ -n "${CONTAINERD_EXTRA_RUNTIME_HANDLER}" ]]; then
   cat >> ${config_path} <<EOF
 [plugins.cri.containerd.runtimes.${CONTAINERD_EXTRA_RUNTIME_HANDLER}]