# required vars: gcloud-api-key.json, $GCLOUD_PROJECT, $GCLOUD_ZONE, $CLUSTER_NAME, $SERVICE_NAME
gcloud auth activate-service-account --key-file gcloud-api-key.json
gcloud config set project $GCLOUD_PROJECT
gcloud config set compute/zone $GCLOUD_ZONE
lines=`gcloud container clusters list --filter NAME="$CLUSTER_NAME" | wc -l`
if [ $lines -eq 0 ] ; then echo "No deployed cluster for $CLUSTER_NAME" && exit 1 ; fi
gcloud container clusters get-credentials $CLUSTER_NAME
external_ip=$(kubectl get svc $SERVICE_NAME --template="{{range .status.loadBalancer.ingress}}{{.ip}}{{end}}")
echo "IP for cluster $CLUSTER_NAME is $external_ip"