Minor cleanup for zones, docs, and outputs

* Spread across all zones, regardless of UP/DOWN state
* Remove unused outputs of private IPs

google-cloud/container-linux/kubernetes/controllers/controllers.tf

@@ -15,9 +15,8 @@ resource "google_dns_record_set" "etcds" {
 }
 
 # Zones in the region
-data "google_compute_zones" "available" {
+data "google_compute_zones" "all" {
   region = "${var.region}"
-  status = "UP"
 }
 
 # Controller instances
@@ -25,7 +24,7 @@ resource "google_compute_instance" "controllers" {
   count = "${var.count}"
 
   name         = "${var.cluster_name}-controller-${count.index}"
-  zone         = "${element(data.google_compute_zones.available.names, count.index)}"
+  zone         = "${element(data.google_compute_zones.all.names, count.index)}"
   machine_type = "${var.machine_type}"
 
   metadata {

google-cloud/container-linux/kubernetes/controllers/network.tf

@@ -30,7 +30,7 @@ resource "google_compute_target_pool" "controllers" {
   name = "${var.cluster_name}-controller-pool"
 
   instances = [
-    "${formatlist("%s/%s", google_compute_instance.controllers.*.zone, google_compute_instance.controllers.*.name)}"
+    "${formatlist("%s/%s", google_compute_instance.controllers.*.zone, google_compute_instance.controllers.*.name)}",
   ]
 
   health_checks = [

google-cloud/container-linux/kubernetes/controllers/outputs.tf

@@ -5,7 +5,3 @@ output "etcd_fqdns" {
 output "ipv4_public" {
   value = ["${google_compute_instance.controllers.*.network_interface.0.access_config.0.assigned_nat_ip}"]
 }
-
-output "ipv4_private" {
-  value = ["${google_compute_instance.controllers.*.network_interface.0.address}"]
-}

google-cloud/container-linux/kubernetes/outputs.tf

@@ -2,10 +2,6 @@ output "controllers_ipv4_public" {
   value = ["${module.controllers.ipv4_public}"]
 }
 
-output "controllers_ipv4_private" {
-  value = ["${module.controllers.ipv4_private}"]
-}
-
 output "ingress_static_ip" {
   value = "${module.workers.ingress_static_ip}"
 }