diff --git a/ezctl b/ezctl
index 049e7cb..66372af 100755
--- a/ezctl
+++ b/ezctl
@@ -110,18 +110,19 @@ function usage-setup(){
   echo -e "\033[33mUsage:\033[0m ezctl setup <cluster> <step>"
   cat <<EOF
 available steps:
-    01     prepare         to prepare CA/certs & kubeconfig & other system settings 
-    02     etcd            to setup the etcd cluster
-    03     runtime         to setup the container runtime(docker or containerd)
-    04     kube-master     to setup the master nodes
-    05     kube-node       to setup the worker nodes
-    06     network         to setup the network plugin
-    07     cluster-addon   to setup other useful plugins
-    all                    to run 01~07 all at once
-    harbor                 to install a new harbor server or to integrate with an existed one
+    01  prepare            to prepare CA/certs & kubeconfig & other system settings 
+    02  etcd               to setup the etcd cluster
+    03  container-runtime  to setup the container runtime(docker or containerd)
+    04  kube-master        to setup the master nodes
+    05  kube-node          to setup the worker nodes
+    06  network            to setup the network plugin
+    07  cluster-addon      to setup other useful plugins
+    90  all                to run 01~07 all at once
+    10  ex-lb              to install external loadbalance for accessing k8s from outside
+    11  harbor             to install a new harbor server or to integrate with an existed one
 
-examples: ./ezctl setup test-k8s 01
-          ./ezctl setup test-k8s 02
+examples: ./ezctl setup test-k8s 01  (or ./ezctl setup test-k8s prepare)
+	  ./ezctl setup test-k8s 02  (or ./ezctl setup test-k8s etcd)
           ./ezctl setup test-k8s all
 EOF
 }
@@ -185,34 +186,34 @@ function setup() {
 
     PLAY_BOOK="dummy.yml"
     case "$2" in
-      (01)
+      (01|prepare)
           PLAY_BOOK="01.prepare.yml"
           ;;
-      (02)
+      (02|etcd)
           PLAY_BOOK="02.etcd.yml"
           ;;
-      (03)
+      (03|container-runtime)
           PLAY_BOOK="03.runtime.yml"
           ;;
-      (04)
+      (04|kube-master)
           PLAY_BOOK="04.kube-master.yml"
           ;;
-      (05)
+      (05|kube-node)
           PLAY_BOOK="05.kube-node.yml"
           ;;
-      (06)
+      (06|network)
           PLAY_BOOK="06.network.yml"
           ;;
-      (07)
+      (07|cluster-addon)
           PLAY_BOOK="07.cluster-addon.yml"
           ;;
-      (90)
+      (90|all)
           PLAY_BOOK="90.setup.yml"
           ;;
-      (all)
-          PLAY_BOOK="90.setup.yml"
+      (10|ex-lb)
+          PLAY_BOOK="10.ex-lb.yml"
           ;;
-      (harbor)
+      (11|harbor)
           PLAY_BOOK="11.harbor.yml"
           ;;
       (*)
diff --git a/playbooks/10.ex-lb.yml b/playbooks/10.ex-lb.yml
new file mode 100644
index 0000000..7b9b256
--- /dev/null
+++ b/playbooks/10.ex-lb.yml
@@ -0,0 +1,3 @@
+- hosts: ex_lb
+  roles:
+  - ex-lb
diff --git a/roles/ex-lb/clean-ex-lb.yml b/roles/ex-lb/clean-ex-lb.yml
index 804354d..0f103b8 100644
--- a/roles/ex-lb/clean-ex-lb.yml
+++ b/roles/ex-lb/clean-ex-lb.yml
@@ -1,24 +1,18 @@
 - hosts:
   - ex_lb
   tasks:
-  - block:
-      - name: stop and disable chrony in Ubuntu
-        service: name=chrony state=stopped enabled=no
-        ignore_errors: true
-        when: 'ansible_distribution in ["Ubuntu","Debian"]' 
-    
-      - name: stop and disable chronyd in CentOS/RedHat
-        service: name=chronyd state=stopped enabled=no
-        ignore_errors: true
-        when: 'ansible_distribution in ["CentOS","RedHat","Amazon","Aliyun"]' 
-    when: "groups['chrony']|length > 0"
+  - name: get service info
+    shell: 'systemctl list-units --type=service |grep -E "haproxy|keepalived|ssh"'
+    register: service_info
 
-  - name: stop keepalived service
-    service: name=keepalived state=stopped enabled=no
+  - name: remove service haproxy
+    service: name=haproxy state=stopped enabled=no
+    when: '"haproxy" in service_info.stdout'
     ignore_errors: true
 
-  - name: stop haproxy service
-    service: name=haproxy state=stopped enabled=no
+  - name: remove service keepalived
+    service: name=keepalived state=stopped enabled=no
+    when: '"keepalived" in service_info.stdout'
     ignore_errors: true
 
   - name: remove files and dirs
@@ -26,11 +20,3 @@
     with_items:
     - "/etc/haproxy"
     - "/etc/keepalived"
-
-  - name: clean 'ENV PATH'
-    lineinfile:
-      dest: ~/.bashrc
-      state: absent
-      regexp: '{{ item }}'
-    with_items:
-    - 'kubeasz'