diff --git a/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh b/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
index bf2bc12..ce5a19b 100755
--- a/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
+++ b/kubernetes/contrib/metallb-loadbalancer-inst/install-metallb-on-cluster.sh
@@ -27,14 +27,14 @@
 
 find_nodes_with_external_addrs()
 {
-	local WORKER_NODES=$(kubectl get no -l node-role.kubernetes.io/worker=true -o jsonpath='{.items..metadata.name}')
-	for worker in $WORKER_NODES; do
-		local external_ip=$(kubectl get no $worker  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/external-ip }')
-		local internal_ip=$(kubectl get no $worker  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/internal-ip }')
-		if [ $internal_ip != $external_ip ]; then
-			echo $external_ip
-		fi
-	done
+    local WORKER_NODES=$(kubectl get no -l node-role.kubernetes.io/worker=true -o jsonpath='{.items..metadata.name}')
+    for worker in $WORKER_NODES; do
+        local external_ip=$(kubectl get no $worker  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/external-ip }')
+        local internal_ip=$(kubectl get no $worker  -o jsonpath='{.metadata.annotations.rke\.cattle\.io/internal-ip }')
+        if [ $internal_ip != $external_ip ]; then
+            echo $external_ip
+        fi
+    done
 }
 
 generate_config_map()
@@ -56,32 +56,32 @@
 }
 
 generate_config_from_single_addr() {
-	generate_config_map "$1 - $1"
+    generate_config_map "$1 - $1"
 }
 
 install_metallb() {
-	kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/namespace.yaml
-	kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/metallb.yaml
-	# Only when install
-	kubectl create secret generic -n metallb-system memberlist --from-literal=secretkey="$(openssl rand -base64 128)"
+    kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/namespace.yaml
+    kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.9.3/manifests/metallb.yaml
+    # Only when install
+    kubectl create secret generic -n metallb-system memberlist --from-literal=secretkey="$(openssl rand -base64 128)"
 }
 
 automatic_configuration() {
-	install_metallb
-	generate_config_from_single_addr $(find_nodes_with_external_addrs)
+    install_metallb
+    generate_config_from_single_addr $(find_nodes_with_external_addrs)
 }
 
 manual_configuration() {
-	install_metallb
-	generate_config_map $@
+    install_metallb
+    generate_config_map $@
 }
 
 if [ $# -eq 1 ] && [ "$1" = "-h" ]; then
-	usage
+    usage
 if [ $# -eq 1 ] && [ "$1" = "--help" ]; then
-	usage
+    usage
 elif [ $# -eq 0 ]; then
-	automatic_configuration
+    automatic_configuration
 else
-	manual_configuration $@
+    manual_configuration $@
 fi