diff --git a/03.docker.yml b/03.docker.yml
index b0711f5..02f3a7e 100644
--- a/03.docker.yml
+++ b/03.docker.yml
@@ -1,8 +1,6 @@
 # to install docker service
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   roles:
   - docker
diff --git a/11.harbor.yml b/11.harbor.yml
index 6443360..289580c 100644
--- a/11.harbor.yml
+++ b/11.harbor.yml
@@ -16,9 +16,7 @@
 
 - hosts: 
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   tasks:
   - name: Define 'harbor_host', a domain
     set_fact: harbor_host="{{ hostvars[groups.harbor[0]]['HARBOR_DOMAIN'] }}"
diff --git a/21.addmaster.yml b/21.addmaster.yml
index dd13466..927edf3 100644
--- a/21.addmaster.yml
+++ b/21.addmaster.yml
@@ -1,16 +1,10 @@
-# reconfigure and restart the haproxy service
-- hosts: lb
-  roles:
-  - lb
-
-- hosts: new-master 
+- hosts: "{{ NODE_TO_ADD }}" 
   roles:
   - { role: chrony, when: "hostvars[groups.deploy[0]]['NTP_ENABLED'] == 'yes'" } 
   - prepare
   - docker
   - kube-master
   - kube-node
-  #
   - { role: calico, when: "CLUSTER_NETWORK == 'calico'" }
   - { role: cilium, when: "CLUSTER_NETWORK == 'cilium'" }
   - { role: flannel, when: "CLUSTER_NETWORK == 'flannel'" }
@@ -18,40 +12,17 @@
   # 
   tasks:
   - name: Making master nodes SchedulingDisabled
-    shell: "{{ bin_dir }}/kubectl cordon {{ inventory_hostname }} "
+    shell: "{{ bin_dir }}/kubectl cordon {{ NODE_TO_ADD }} "
     delegate_to: "{{ groups.deploy[0] }}"
     when: DEPLOY_MODE != "allinone"
     ignore_errors: true
 
   - name: Setting master role name
-    shell: "{{ bin_dir }}/kubectl label node {{ inventory_hostname }} kubernetes.io/role=master --overwrite"
+    shell: "{{ bin_dir }}/kubectl label node {{ NODE_TO_ADD }} kubernetes.io/role=master --overwrite"
     ignore_errors: true
     delegate_to: "{{ groups.deploy[0] }}"
 
-# modify the ansible hosts file
-- hosts:
-  - new-master
-  tasks:
-  - name: tag new-master FINISHED=yes
-    shell: 'sed -i "/\[new-master/,/\[kube-node/s/{{ inventory_hostname }}/{{ inventory_hostname }} FINISHED=yes/" {{ base_dir }}/hosts'
-    args:
-      warn: false
-    connection: local
-
-  - name: cp new-master to 'kube-master' group
-    lineinfile:
-      dest: "{{ base_dir }}/hosts"
-      state: present
-      insertafter: '^\[kube-master'
-      firstmatch: yes
-      line: "{{ inventory_hostname }} NEW_MASTER=yes"
-    connection: local
-
-- hosts: deploy
-  tasks:
-  - name: rm new-master in ansible hosts
-    lineinfile:
-      dest: "{{ base_dir }}/hosts"
-      state: absent
-      regexp: 'FINISHED=yes'
-    connection: local
+# reconfigure and restart the haproxy service
+- hosts: lb
+  roles:
+  - { role: lb, tags:['restart_lb'] }
diff --git a/22.upgrade.yml b/22.upgrade.yml
index 529b9eb..6a92d3a 100644
--- a/22.upgrade.yml
+++ b/22.upgrade.yml
@@ -4,9 +4,7 @@
 # update kubectl binary
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   - deploy
   roles:
   - prepare
@@ -14,7 +12,6 @@
 # update masters
 - hosts: 
   - kube-master
-  - new-master
   roles:
   - kube-master
   - kube-node
@@ -22,6 +19,5 @@
 # update nodes
 - hosts: 
   - kube-node
-  - new-node
   roles:
   - { role: kube-node, when: "DEPLOY_MODE != 'allinone'" }
diff --git a/24.restore.yml b/24.restore.yml
index d9c90e2..4b0467b 100644
--- a/24.restore.yml
+++ b/24.restore.yml
@@ -41,15 +41,12 @@
 - hosts:
   - kube-master
   - kube-node
-  - new-master
-  - new-node
   roles:
   - docker
 
 # to set up 'kube-master' nodes
 - hosts:
   - kube-master
-  - new-master
   roles:
   - kube-master
   - kube-node
@@ -67,7 +64,6 @@
 # to set up 'kube-node' nodes
 - hosts:
   - kube-node
-  - new-node
   roles:
   - kube-node
 
diff --git a/99.clean.yml b/99.clean.yml
index 46748d3..f37fbb5 100644
--- a/99.clean.yml
+++ b/99.clean.yml
@@ -4,9 +4,7 @@
 # to clean 'kube-node' nodes
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   tasks:
   - name: stop and disable kube-node service
     service: name={{ item }} state=stopped enabled=no
@@ -33,7 +31,6 @@
 # to clean 'kube-master' nodes
 - hosts:
   - kube-master
-  - new-master
   tasks:
   - name: stop and disable kube-master service
     service: name={{ item }} state=stopped enabled=no
@@ -54,9 +51,7 @@
 # to clean docker service and networking
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   tasks:
   - name: clean 'kube-router' stuff
     shell: "{{ bin_dir }}/docker run --privileged --net=host cloudnativelabs/kube-router --cleanup-config"
@@ -168,9 +163,7 @@
 # to clean ntp, certs and keys, env path
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   - deploy
   - etcd
   - lb
diff --git a/roles/ex-lb/templates/haproxy.cfg.j2 b/roles/ex-lb/templates/haproxy.cfg.j2
index da43653..f4cbe97 100644
--- a/roles/ex-lb/templates/haproxy.cfg.j2
+++ b/roles/ex-lb/templates/haproxy.cfg.j2
@@ -25,9 +25,6 @@ listen ingress-node
 {% for host in groups['kube-node'] %}
         server {{ host }} {{ host }}:23456 check inter 2000 fall 2 rise 2 weight 1
 {% endfor %}
-{% for host in groups['new-node'] %}
-        server {{ host }} {{ host }}:23456 check inter 2000 fall 2 rise 2 weight 1
-{% endfor %}
 {% endif %}
 {% if INGRESS_TLS_NODEPORT_LB == "yes" %}
 
@@ -39,7 +36,4 @@ listen ingress-node-tls
 {% for host in groups['kube-node'] %}
         server {{ host }} {{ host }}:23457 check inter 2000 fall 2 rise 2 weight 1
 {% endfor %}
-{% for host in groups['new-node'] %}
-        server {{ host }} {{ host }}:23457 check inter 2000 fall 2 rise 2 weight 1
-{% endfor %}
 {% endif %}
diff --git a/roles/kube-master/templates/kube-apiserver-v1.8.service.j2 b/roles/kube-master/templates/kube-apiserver-v1.8.service.j2
index c1357d7..0c3cbbb 100644
--- a/roles/kube-master/templates/kube-apiserver-v1.8.service.j2
+++ b/roles/kube-master/templates/kube-apiserver-v1.8.service.j2
@@ -25,7 +25,7 @@ ExecStart={{ bin_dir }}/kube-apiserver \
   --etcd-keyfile={{ ca_dir }}/kubernetes-key.pem \
   --etcd-servers={{ ETCD_ENDPOINTS }} \
   --enable-swagger-ui=true \
-  --apiserver-count={% if DEPLOY_MODE == "multi-master" %}{{ groups['kube-master']|length + groups['new-master']|length }}{% else %}1{% endif %} \
+  --apiserver-count={% if DEPLOY_MODE == "multi-master" %}{{ groups['kube-master']|length }}{% else %}1{% endif %} \
   --allow-privileged=true \
   --audit-log-maxage=30 \
   --audit-log-maxbackup=3 \
diff --git a/roles/lb/templates/haproxy.cfg.j2 b/roles/lb/templates/haproxy.cfg.j2
index 6efe895..b9b3409 100644
--- a/roles/lb/templates/haproxy.cfg.j2
+++ b/roles/lb/templates/haproxy.cfg.j2
@@ -23,9 +23,6 @@ listen kube-master
 {% for host in groups['kube-master'] %}
         server {{ host }} {{ host }}:6443 check inter 2000 fall 2 rise 2 weight 1
 {% endfor %}
-{% for host in groups['new-master'] %}
-        server {{ host }} {{ host }}:6443 check inter 2000 fall 2 rise 2 weight 1
-{% endfor %}
 {% if INGRESS_NODEPORT_LB == "yes" %}
 
 listen ingress-node
@@ -36,9 +33,6 @@ listen ingress-node
 {% for host in groups['kube-node'] %}
         server {{ host }} {{ host }}:23456 check inter 2000 fall 2 rise 2 weight 1
 {% endfor %}
-{% for host in groups['new-node'] %}
-        server {{ host }} {{ host }}:23456 check inter 2000 fall 2 rise 2 weight 1
-{% endfor %}
 {% endif %}
 {% if INGRESS_TLS_NODEPORT_LB == "yes" %}
 
@@ -50,7 +44,4 @@ listen ingress-node-tls
 {% for host in groups['kube-node'] %}
         server {{ host }} {{ host }}:23457 check inter 2000 fall 2 rise 2 weight 1
 {% endfor %}
-{% for host in groups['new-node'] %}
-        server {{ host }} {{ host }}:23457 check inter 2000 fall 2 rise 2 weight 1
-{% endfor %}
 {% endif %}
diff --git a/tools/change_k8s_network.yml b/tools/change_k8s_network.yml
index 34dff13..99b973f 100644
--- a/tools/change_k8s_network.yml
+++ b/tools/change_k8s_network.yml
@@ -1,9 +1,7 @@
 # 重置k8s pod网络脚本，使用请仔细阅读 docs/op/change_k8s_network.md
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   tasks:
   - name: 获取所有已经创建的POD信息
     command: "{{ bin_dir }}/kubectl get daemonset -n kube-system"
@@ -98,9 +96,7 @@
   
 - hosts:
   - kube-master
-  - new-master
   - kube-node
-  - new-node
   # 安装新的网络插件
   roles:
   - { role: calico, when: "CLUSTER_NETWORK == 'calico'" }