Add verbosity to cluster-wait script

Author: rjosephwright

hack/cluster-wait

@@ -3,18 +3,23 @@
 CLUSTER_NAME=${CLUSTER_NAME:?CLUSTER_NAME is required}
 KEIGHTS=${KEIGHTS:?KEIGHTS is required}
 TIMEOUT_SECONDS=${TIMEOUT_SECONDS:-900}
-INTERVAL_SECONDS=${INTERVAL_SECONDS:-10}
+INTERVAL_SECONDS=${INTERVAL_SECONDS:-5}
+QUIET=${QUIET:-false}
 
 kubectl() {
-    ${KEIGHTS} kubectl --cluster-name ${CLUSTER_NAME} -- "${@}"
+    if [ "${QUIET}" = "true" ]; then
+        ${KEIGHTS} kubectl --cluster-name ${CLUSTER_NAME} -- "${@}" >/dev/null 2>&1
+    else
+        ${KEIGHTS} kubectl --cluster-name ${CLUSTER_NAME} -- "${@}"
+    fi
 }
 
 now=$(date +%s)
 deadline=$((${now} + ${TIMEOUT_SECONDS}))
 
 echo "Waiting for API server..."
 while true; do
-    if kubectl get --raw /readyz >/dev/null 2>&1; then
+    if kubectl get --raw /readyz; then
         break
     fi
     now=$(date +%s)
@@ -27,7 +32,7 @@ done
 
 echo "Waiting for nodes to be Ready..."
 while true; do
-    if kubectl wait --for=condition=Ready nodes --all --timeout=1s >/dev/null 2>&1; then
+    if kubectl wait --for=condition=Ready nodes --all --timeout=1s; then
         break
     fi
     now=$(date +%s)