Merge pull request #24391 from bprashanth/ing_templated_controller

Automatic merge from submit-queue

Template the ingress controller 

We still need https://github.com/kubernetes/contrib/pull/791 to run the controller as a static pod
ref https://github.com/kubernetes/kubernetes/issues/23663

cluster/common.sh

@@ -202,6 +202,16 @@ function gen-kube-bearertoken() {
     KUBE_BEARER_TOKEN=$(dd if=/dev/urandom bs=128 count=1 2>/dev/null | base64 | tr -d "=+/" | dd bs=32 count=1 2>/dev/null)
 }
 
+# Generate uid
+# This function only works on systems with python. It generates a time based
+# UID instead of a UUID because GCE has a name length limit.
+#
+# Vars set:
+#   KUBE_UID
+function gen-uid {
+    KUBE_UID=$(python -c 'import uuid; print uuid.uuid1().fields[0]')
+}
+
 
 function load-or-gen-kube-basicauth() {
   if [[ ! -z "${KUBE_CONTEXT:-}" ]]; then
@@ -456,6 +466,7 @@ function build-kube-env {
   local file=$2
 
   build-runtime-config
+  gen-uid
 
   rm -f ${file}
   cat >$file <<EOF
@@ -503,6 +514,7 @@ KUBE_DOCKER_REGISTRY: $(yaml-quote ${KUBE_DOCKER_REGISTRY:-})
 KUBE_ADDON_REGISTRY: $(yaml-quote ${KUBE_ADDON_REGISTRY:-})
 MULTIZONE: $(yaml-quote ${MULTIZONE:-})
 NON_MASQUERADE_CIDR: $(yaml-quote ${NON_MASQUERADE_CIDR:-})
+KUBE_UID: $(yaml-quote ${KUBE_UID:-})
 EOF
   if [ -n "${KUBELET_PORT:-}" ]; then
     cat >>$file <<EOF