From 23c358d883b7f8581623c423b3c63ce3d323a1ad Mon Sep 17 00:00:00 2001
From: Joe Betz <jpbetz@google.com>
Date: Thu, 12 Mar 2020 16:41:25 -0700
Subject: [PATCH] Fix unbound variable error in gce/configure.sh

Looks like UBUNTU_INSTALL_RUNC_VERSION should be optional here.
---
 cluster/gce/gci/configure.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cluster/gce/gci/configure.sh b/cluster/gce/gci/configure.sh
index e8891e4e049..b5d6f8dc1f1 100644
--- a/cluster/gce/gci/configure.sh
+++ b/cluster/gce/gci/configure.sh
@@ -498,7 +498,7 @@ function ensure-container-runtime {
     docker version
   elif [[ "${container_runtime}" == "containerd" ]]; then
     # Install containerd/runc if requested
-    if [[ ! -z "${UBUNTU_INSTALL_CONTAINERD_VERSION:-}" || ! -z "${UBUNTU_INSTALL_RUNC_VERSION}" ]]; then
+    if [[ ! -z "${UBUNTU_INSTALL_CONTAINERD_VERSION:-}" || ! -z "${UBUNTU_INSTALL_RUNC_VERSION:-}" ]]; then
       install-containerd-ubuntu
     fi
     # Verify presence and print versions of ctr, containerd, runc