Add GCE_GLBC_IMAGE to allow override glbc image

cluster/gce/config-default.sh

@@ -250,6 +250,11 @@ if [[ -n "${GCE_ALPHA_FEATURES:-}" ]]; then
   PROVIDER_VARS="${PROVIDER_VARS:-} GCE_ALPHA_FEATURES"
 fi
 
+# Override default GLBC image
+if [[ -n "${GCE_GLBC_IMAGE:-}" ]]; then
+  PROVIDER_VARS="${PROVIDER_VARS:-} GCE_GLBC_IMAGE"
+fi
+
 # Admission Controllers to invoke prior to persisting objects in cluster
 # If we included ResourceQuota, we should keep it at the end of the list to prevent incrementing quota usage prematurely.
 ADMISSION_CONTROL=Initializers,NamespaceLifecycle,LimitRanger,ServiceAccount,PersistentVolumeLabel,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,Priority,ResourceQuota

cluster/gce/config-test.sh

@@ -287,6 +287,11 @@ if [[ -n "${GCE_ALPHA_FEATURES:-}" ]]; then
   PROVIDER_VARS="${PROVIDER_VARS:-} GCE_ALPHA_FEATURES"
 fi
 
+# Override default GLBC image
+if [[ -n "${GCE_GLBC_IMAGE:-}" ]]; then
+  PROVIDER_VARS="${PROVIDER_VARS:-} GCE_GLBC_IMAGE"
+fi
+
 # If we included ResourceQuota, we should keep it at the end of the list to prevent incrementing quota usage prematurely.
 ADMISSION_CONTROL="${KUBE_ADMISSION_CONTROL:-Initializers,NamespaceLifecycle,LimitRanger,ServiceAccount,PersistentVolumeLabel,PodPreset,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,Priority,ResourceQuota}"
 

cluster/gce/container-linux/configure-helper.sh

@@ -1358,8 +1358,12 @@ function start-lb-controller {
     echo "Start GCE L7 pod"
     prepare-log-file /var/log/glbc.log
     setup-addon-manifests "addons" "cluster-loadbalancing/glbc"
-    cp "${KUBE_HOME}/kube-manifests/kubernetes/gci-trusty/glbc.manifest" \
-       /etc/kubernetes/manifests/
+
+    local -r glbc_manifest="${KUBE_HOME}/kube-manifests/kubernetes/gci-trusty/glbc.manifest"
+    if [[ ! -z "${GCE_GLBC_IMAGE:-}" ]]; then
+      sed -i "s@image:.*@image: ${GCE_GLBC_IMAGE}@" "${glbc_manifest}"
+    fi
+    cp "${glbc_manifest}" /etc/kubernetes/manifests/
   fi
 }
 

cluster/gce/gci/configure-helper.sh

@@ -1878,8 +1878,12 @@ function start-lb-controller {
     echo "Start GCE L7 pod"
     prepare-log-file /var/log/glbc.log
     setup-addon-manifests "addons" "cluster-loadbalancing/glbc"
-    cp "${KUBE_HOME}/kube-manifests/kubernetes/gci-trusty/glbc.manifest" \
-       /etc/kubernetes/manifests/
+
+    local -r glbc_manifest="${KUBE_HOME}/kube-manifests/kubernetes/gci-trusty/glbc.manifest"
+    if [[ ! -z "${GCE_GLBC_IMAGE:-}" ]]; then
+      sed -i "s@image:.*@image: ${GCE_GLBC_IMAGE}@" "${glbc_manifest}"
+    fi
+    cp "${glbc_manifest}" /etc/kubernetes/manifests/
   fi
 }