diff --git a/ansible.cfg b/ansible.cfg
index e85aeed..12bbdd0 100644
--- a/ansible.cfg
+++ b/ansible.cfg
@@ -112,7 +112,7 @@ display_skipped_hosts = False
 # by default (as of 1.4), Ansible may display deprecation warnings for language
 # features that should no longer be used and will be removed in future versions.
 # to disable these warnings, set the following value to False:
-#deprecation_warnings = True
+deprecation_warnings = False 
 
 # (as of 1.8), Ansible can optionally warn when usage of the shell and
 # command module appear to be simplified by using a default Ansible module
diff --git a/docs/guide/harbor.md b/docs/guide/harbor.md
index d1288c1..f3cf6df 100644
--- a/docs/guide/harbor.md
+++ b/docs/guide/harbor.md
@@ -41,7 +41,7 @@ Habor是由VMWare中国团队开源的容器镜像仓库。事实上，Habor是
 - role `prepare` 基础系统环境准备
 - role `docker` 安装docker
 - role `harbor` 安装harbor
-- 注意：`kube-node`节点在harbor部署完之后，需要配置harbor的证书（详见下节配置docker/containerd信任harbor证书），并可以在hosts里面添加harbor的域名解析，如果你的环境中有dns服务器，可以跳过hosts文件设置
+- 注意：`kube_node`节点在harbor部署完之后，需要配置harbor的证书（详见下节配置docker/containerd信任harbor证书），并可以在hosts里面添加harbor的域名解析，如果你的环境中有dns服务器，可以跳过hosts文件设置
 
 请在另外窗口打开 [roles/harbor/tasks/main.yml](../../roles/harbor/tasks/main.yml)，对照以下讲解
 
diff --git a/docs/op/ChangeVIP.md b/docs/op/ChangeVIP.md
deleted file mode 100644
index 6df41f7..0000000
--- a/docs/op/ChangeVIP.md
+++ /dev/null
@@ -1,107 +0,0 @@
-# 更改高可用 `Master IP`
-
-**WARNING:** 更改集群的 `Master VIP`操作有风险，不建议在生产环境直接操作，此文档实践一个修改的操作流程，帮助理解整个集群运行架构和 `kubeasz`的部署逻辑，请在测试环境操作练手。
-**BUG:** 目前该操作只适用于集群网络选用`calico`，如果使用`flannel`操作变更后会出现POD地址分配错误的BUG。
-
-首先分析大概操作思路：
-
-- 修改`/etc/ansible/hosts`里面的配置项`MASTER_IP` `KUBE_APISERVER`
-- 修改LB节点的keepalive的配置，重启keepalived服务
-- 修改kubectl/kube-proxy的配置文件，使用新VIP地址更新api-server地址
-- 重新生成master证书，hosts字段包含新VIP地址
-- 修改kubelet的配置文件（kubelet的配置文件和证书是由bootstrap机制自动生成的）
-  - 删除kubelet.kubeconfig
-  - 删除集群所有node 节点
-  - 所有节点重新bootstrap
-
-## 变更前状态验证
-
-``` bash
-$ kubectl get cs,node,pod -o wide
-NAME                 STATUS    MESSAGE             ERROR
-controller-manager   Healthy   ok                  
-scheduler            Healthy   ok                  
-etcd-2               Healthy   {"health":"true"}   
-etcd-0               Healthy   {"health":"true"}   
-etcd-1               Healthy   {"health":"true"}   
-
-NAME           STATUS                     ROLES     AGE       VERSION   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
-192.168.1.41   Ready,SchedulingDisabled   <none>    2h        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-97-generic   docker://18.3.0
-192.168.1.42   Ready,SchedulingDisabled   <none>    2h        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-97-generic   docker://18.3.0
-192.168.1.43   Ready                      <none>    2h        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-97-generic   docker://18.3.0
-192.168.1.44   Ready                      <none>    2h        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-98-generic   docker://18.3.0
-192.168.1.45   Ready                      <none>    2h        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-98-generic   docker://18.3.0
-
-NAME                     READY     STATUS    RESTARTS   AGE       IP               NODE
-busy-5d6b6b5d4b-8wxkp    1/1       Running   0          17h       172.20.135.133   192.168.1.41
-busy-5d6b6b5d4b-fcmkp    1/1       Running   0          17h       172.20.135.128   192.168.1.41
-busy-5d6b6b5d4b-ptvd7    1/1       Running   0          17h       172.20.135.136   192.168.1.41
-nginx-768979984b-ncqbp   1/1       Running   0          17h       172.20.135.137   192.168.1.41
-
-# 查看待变更集群 Master VIP
-$ kubectl cluster-info 
-Kubernetes master is running at https://192.168.1.39:8443
-```
-
-## 变更操作
-
-- `ansible playbook`可以使用tags来控制只允许部分任务执行，这里为简化操作没有细化，在ansible控制端具体操作如下：
-
-``` bash
-# 1.修改/etc/ansible/hosts 配置项MASTER_IP，KUBE_APISERVER
-
-# 2.删除集群所有node节点，等待重新bootstrap
-$ kubectl get node |grep Ready|awk '{print $1}' |xargs kubectl delete node
-
-# 3.重置keepalived 和修改kubectl/kube-proxy/bootstrap配置
-$ ansible-playbook 01.prepare.yml
-
-# 4.删除旧master证书
-$ ansible kube-master -m file -a 'path=/etc/kubernetes/ssl/kubernetes.pem state=absent'
-
-# 5.删除旧kubelet配置文件
-$ ansible all -m file -a 'path=/etc/kubernetes/kubelet.kubeconfig state=absent'
-
-# 6.重新配置启动master节点
-$ ansible-playbook 04.kube-master.yml
-
-# 7.重新配置启动node节点
-$ ansible-playbook 05.kube-node.yml
-```
-
-## 变更后验证
-
-``` bash
-$ kubectl get cs,node,pod -o wide
-NAME                 STATUS    MESSAGE             ERROR
-scheduler            Healthy   ok                  
-controller-manager   Healthy   ok                  
-etcd-2               Healthy   {"health":"true"}   
-etcd-1               Healthy   {"health":"true"}   
-etcd-0               Healthy   {"health":"true"}   
-
-NAME           STATUS                     ROLES     AGE       VERSION   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
-192.168.1.41   Ready,SchedulingDisabled   <none>    4m        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-97-generic   docker://18.3.0
-192.168.1.42   Ready,SchedulingDisabled   <none>    4m        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-97-generic   docker://18.3.0
-192.168.1.43   Ready                      <none>    3m        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-97-generic   docker://18.3.0
-192.168.1.44   Ready                      <none>    3m        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-98-generic   docker://18.3.0
-192.168.1.45   Ready                      <none>    3m        v1.10.0   <none>        Ubuntu 16.04.3 LTS   4.4.0-98-generic   docker://18.3.0
-
-NAME                     READY     STATUS    RESTARTS   AGE       IP               NODE
-busy-5d6b6b5d4b-25hfr    1/1       Running   0          5m        172.20.237.64    192.168.1.43
-busy-5d6b6b5d4b-cdzb5    1/1       Running   0          5m        172.20.145.192   192.168.1.44
-busy-5d6b6b5d4b-m2rf7    1/1       Running   0          5m        172.20.26.131    192.168.1.45
-nginx-768979984b-2ngww   1/1       Running   0          5m        172.20.145.193   192.168.1.44
-
-# 查看集群master VIP已经变更 
-$ kubectl cluster-info 
-Kubernetes master is running at https://192.168.1.40:8443
-```
-
-## 小结
-
-本示例操作演示了多主多节点k8s集群变更`Master VIP`的操作，有助于理解整个集群组件架构和`kubeasz`的安装逻辑，小结如下：
-
-- 变更操作不影响集群已运行的业务POD，但是操作过程中业务会中断
-- 已运行POD会重新调度到各node节点，如果业务POD量很大，短时间内会对集群造成压力
-- 不建议在生成环境直接操作，本示例演示说明为主
diff --git a/docs/op/ch_apiserver_cert.md b/docs/op/ch_apiserver_cert.md
index 3fbd804..d0baf75 100644
--- a/docs/op/ch_apiserver_cert.md
+++ b/docs/op/ch_apiserver_cert.md
@@ -5,8 +5,8 @@
 ```
   "hosts": [
     "127.0.0.1",
-{% if groups['ex-lb']|length > 0 %}
-    "{{ hostvars[groups['ex-lb'][0]]['EX_APISERVER_VIP'] }}",
+{% if groups['ex_lb']|length > 0 %}
+    "{{ hostvars[groups['ex_lb'][0]]['EX_APISERVER_VIP'] }}",
 {% endif %}
     "{{ inventory_hostname }}",
     "{{ CLUSTER_KUBERNETES_SVC_IP }}",
diff --git a/docs/op/loadballance_ingress_nodeport.md b/docs/op/loadballance_ingress_nodeport.md
index 2985ea4..8e79192 100644
--- a/docs/op/loadballance_ingress_nodeport.md
+++ b/docs/op/loadballance_ingress_nodeport.md
@@ -6,9 +6,9 @@
 - 2.部署ingress-controller时使用`LoadBalancer`类型服务，需要集群支持`LoadBalancer`
 - 3.部署ingress-controller时使用`nodePort`类型服务，然后在集群外使用 haproxy/f5 等配置 virtual server 集群
 
-本文档讲解使用 haproxy 配置 ingress的 VS 集群，前提是配置了自建`ex-lb`节点
+本文档讲解使用 haproxy 配置 ingress的 VS 集群，前提是配置了自建`ex_lb`节点
 
-## 1.配置 ex-lb 参数开启转发 ingress nodeport
+## 1.配置 ex_lb 参数开启转发 ingress nodeport
 
 ``` bash
 # 编辑 roles/ex-lb/defaults/main.yml，配置如下变量
@@ -22,11 +22,11 @@ INGRESS_TLS_NODEPORT_LB: "yes"
 $ ansible-playbook /etc/ansible/roles/ex-lb/ex-lb.yml
 ```
 
-## 3.验证 ex-lb 节点的 haproxy 服务配置 `/etc/haproxy/haproxy.cfg` 包含如下配置
+## 3.验证 ex_lb 节点的 haproxy 服务配置 `/etc/haproxy/haproxy.cfg` 包含如下配置
 
 ``` bash
 ... 前文省略
-listen kube-master
+listen kube_master
         bind 0.0.0.0:8443
         mode tcp
         option tcplog
diff --git a/docs/op/op-index.md b/docs/op/op-index.md
index c722dba..123cd2a 100644
--- a/docs/op/op-index.md
+++ b/docs/op/op-index.md
@@ -4,7 +4,6 @@
 - [管理 MASTER 节点](op-master.md)
 - [管理 ETCD 节点](op-etcd.md)
 - [升级 K8S 版本](upgrade.md)
-- [修改多主集群VIP地址](ChangeVIP.md)
 - [修改AIO部署的系统IP](change_ip_allinone.md)
 - [替换集群使用的网络插件](change_k8s_network.md)
 - [集群备份与恢复](cluster_restore.md)
diff --git a/docs/op/op-master.md b/docs/op/op-master.md
index dc7780e..2823190 100644
--- a/docs/op/op-master.md
+++ b/docs/op/op-master.md
@@ -1,13 +1,13 @@
-# 管理 kube-master 节点
+# 管理 kube_master 节点
 
-## 1.增加 kube-master 节点
+## 1.增加 kube_master 节点
 
-新增`kube-master`节点大致流程为：tools/03.addmaster.yml
+新增`kube_master`节点大致流程为：tools/03.addmaster.yml
 - [可选]新节点安装 chrony 时间同步
 - 新节点预处理 prepare
 - 新节点安装 docker 服务
-- 新节点安装 kube-master 服务
-- 新节点安装 kube-node 服务
+- 新节点安装 kube_master 服务
+- 新节点安装 kube_node 服务
 - 新节点安装网络插件相关
 - 禁止业务 pod调度到新master节点
 - 更新 node 节点 haproxy 负载均衡并重启
@@ -41,10 +41,10 @@ NAME           STATUS                     ROLES     AGE       VERSION
 192.168.1.11   Ready,SchedulingDisabled   <none>    2h        v1.9.3	# 新增 master节点
 ```
 
-## 2.删除 kube-master 节点
+## 2.删除 kube_master 节点
 
 
-删除`kube-master`节点大致流程为：tools/13.delmaster.yml
+删除`kube_master`节点大致流程为：tools/13.delmaster.yml
 - 检测是否可以删除
 - 迁移节点 pod
 - 删除 master 相关服务及文件
diff --git a/docs/op/op-node.md b/docs/op/op-node.md
index 39da882..2fcd598 100644
--- a/docs/op/op-node.md
+++ b/docs/op/op-node.md
@@ -1,17 +1,17 @@
 # 管理 node 节点
 
 目录
-- 1.增加 kube-node 节点
+- 1.增加 kube_node 节点
 - 2.增加非标准ssh端口节点
-- 3.删除 kube-node 节点
+- 3.删除 kube_node 节点
 
-## 1.增加 kube-node 节点
+## 1.增加 kube_node 节点
 
-新增`kube-node`节点大致流程为：tools/02.addnode.yml
+新增`kube_node`节点大致流程为：tools/02.addnode.yml
 - [可选]新节点安装 chrony 时间同步
 - 新节点预处理 prepare
 - 新节点安装 docker 服务
-- 新节点安装 kube-node 服务
+- 新节点安装 kube_node 服务
 - 新节点安装网络插件相关
 
 ### 操作步骤
@@ -39,13 +39,13 @@ $ kubectl get pod -n kube-system
 目前 ezctl 暂不支持自动添加非标准 ssh 端口的节点，可以手动操作如下：
 
 - 假设待添加节点192.168.2.1，ssh 端口 10022；配置免密登录 ssh-copy-id -p 10022 192.168.2.1，按提示输入密码
-- 在 /etc/ansible/hosts文件 [kube-node] 组下添加一行：
+- 在 /etc/ansible/hosts文件 [kube_node] 组下添加一行：
 ```
 192.168.2.1 ansible_ssh_port=10022
 ```
 - 最后执行 `ansible-playbook /etc/ansible/tools/02.addnode.yml -e NODE_TO_ADD=192.168.2.1`
 
-## 3.删除 kube-node 节点
+## 3.删除 kube_node 节点
 
 删除 node 节点流程：tools/12.delnode.yml
 - 检测是否可以删除
diff --git a/docs/release-notes/kubeasz-0.5.1.md b/docs/release-notes/kubeasz-0.5.1.md
index 1643c15..86d0062 100644
--- a/docs/release-notes/kubeasz-0.5.1.md
+++ b/docs/release-notes/kubeasz-0.5.1.md
@@ -8,7 +8,7 @@ CHANGELOG:
 - 集群安装：
   - 更新 calico 3.3.2，并保留3.2.4可选
   - 修复特定环境下lb节点变量LB_IF自动设置错误
-  - 移除 kube-node csr 请求批准部分（PR #399）
+  - 移除 kube_node csr 请求批准部分（PR #399）
   - 添加支持 RedHat （PR #431）
   - 修改 docker 存储的目录设置（PR #436）
   - 更新 kube-schedule 监听参数 （PR #440）
diff --git a/docs/release-notes/kubeasz-0.6.0.md b/docs/release-notes/kubeasz-0.6.0.md
index 717f333..31609f0 100644
--- a/docs/release-notes/kubeasz-0.6.0.md
+++ b/docs/release-notes/kubeasz-0.6.0.md
@@ -13,7 +13,7 @@ CHANGELOG:
   - helm/tiller: v2.12.3
 - 集群安装：
   - **增加添加/删除 etcd 节点**脚本和[文档](https://github.com/easzlab/kubeasz/blob/master/docs/op/op-etcd.md)
-  - **增加可选配置附加负载均衡节点（ex-lb）**，可用于负载均衡 NodePort 方式暴露的服务
+  - **增加可选配置附加负载均衡节点（ex_lb）**，可用于负载均衡 NodePort 方式暴露的服务
   - 更新删除节点脚本和[文档](https://github.com/easzlab/kubeasz/blob/master/docs/op/del_one_node.md)
   - 优化增加 node 和增加 master 节点流程
   - 更新 harbor 安装流程和文档
diff --git a/docs/release-notes/kubeasz-1.0.0.md b/docs/release-notes/kubeasz-1.0.0.md
index 3e2c7cd..c19e7be 100644
--- a/docs/release-notes/kubeasz-1.0.0.md
+++ b/docs/release-notes/kubeasz-1.0.0.md
@@ -15,7 +15,7 @@ CHANGELOG: (0.6.x 版本以后)
   - 优化 ansible hosts 配置，更加精简、易用
     - 废弃 new-node/new-master/new-etcd 主机组，对应功能已集成在 easzctl 命令行
     - 废弃变量 K8S_VER，改为自动识别，避免手工配置错误
-    - 迁移 basic_auth 相关配置至 roles:kube-master，增强初始安全性，且默认关闭apiserver的用户名/密码认证，详见 roles/kube-master/defaults/main.yml
+    - 迁移 basic_auth 相关配置至 roles:kube_master，增强初始安全性，且默认关闭apiserver的用户名/密码认证，详见 roles/kube-master/defaults/main.yml
   - easzctl 提供以下集群层面操作
     - 切换/创建集群 context
     - 删除当前集群
diff --git a/docs/release-notes/kubeasz-2.0.0.md b/docs/release-notes/kubeasz-2.0.0.md
index 3a15d1f..5796de2 100644
--- a/docs/release-notes/kubeasz-2.0.0.md
+++ b/docs/release-notes/kubeasz-2.0.0.md
@@ -10,11 +10,11 @@ CHANGELOG:
 - 集群安装：
   - 废弃 ansible hosts 中 deploy 角色，精简保留2个预定义节点规划例子（example/hosts.xx）
   - 重构 prepare 安装流程（删除 deploy 角色，移除 lb 节点创建）
-  - 调整 kube-master 安装流程
-  - 调整 kube-node 安装流程（node 节点新增 haproxy 服务）
+  - 调整 kube_master 安装流程
+  - 调整 kube_node 安装流程（node 节点新增 haproxy 服务）
   - 调整 network 等其他安装流程
   - 精简 example hosts 配置文件及配置项
-  - 调整 ex-lb 安装流程【可选】
+  - 调整 ex_lb 安装流程【可选】
   - 添加 docker/containerd 安装时互斥判断
   - 新增 role: clean，重写清理脚本 99.clean.yml
   - 废弃 tools/clean_one_node.yml
@@ -38,7 +38,7 @@ CHANGELOG:
     - node 节点安装文档
     - ...
   - 集群操作管理文档更新（docs/op/op-index.md）
-  - 新增可选外部负载均衡文档（docs/setup/ex-lb.md）
+  - 新增可选外部负载均衡文档（docs/setup/ex_lb.md）
   - 新增容器化系统服务 haproxy/chrony 文档（docs/practice/dockerize_system_service.md）
 - 其他：
   - fix: 对已有集群进行安全加固时禁用 ip_forward 问题
diff --git a/docs/release-notes/kubeasz-2.0.2.md b/docs/release-notes/kubeasz-2.0.2.md
index 62ecbbd..7fb36d3 100644
--- a/docs/release-notes/kubeasz-2.0.2.md
+++ b/docs/release-notes/kubeasz-2.0.2.md
@@ -24,7 +24,7 @@ CHANGELOG:
   - new logo
   - fix: 执行roles/cluster-storage/cluster-storage.yml 报错不存在`deploy`
   - fix: 部分os启用kube-reserved出错（提示/sys/fs/cgroup只读）
-  - fix: ex-lb 组少量 keepalived 相关配置
+  - fix: ex_lb 组少量 keepalived 相关配置
   - fix: 偶然出现docker安装时提示找不到变量`docker_ver`
   - fix: Ubuntu1804 pod内dns解析不到外网
   - fix: k8s 相关服务在接收SIGPIPE信号停止后不重启问题 #631 thx to gj19910723
diff --git a/docs/release-notes/kubeasz-2.2.0.md b/docs/release-notes/kubeasz-2.2.0.md
index d44ed57..5203d50 100644
--- a/docs/release-notes/kubeasz-2.2.0.md
+++ b/docs/release-notes/kubeasz-2.2.0.md
@@ -23,7 +23,7 @@ CHANGELOG:
   - easzup: 修复安装 docker 逻辑 aa76da0f2ee2b01d47c28667feed36b6be778b17
 - 其他
   - fix: dashboard生成cluster-service #739
-  - fix: ubuntu1804安装ex-lb失败问题
+  - fix: ubuntu1804安装ex_lb失败问题
   - fix: calico的BGP RR模式下的bgppeer的nodeSelector错误 #741
   - fix: ectd集群有不正常节点时增/删etcd节点失败 #743
   - fix: kube-router 安装报错 #783
diff --git a/docs/setup/00-planning_and_overall_intro.md b/docs/setup/00-planning_and_overall_intro.md
index 09e8640..1f1afa6 100644
--- a/docs/setup/00-planning_and_overall_intro.md
+++ b/docs/setup/00-planning_and_overall_intro.md
@@ -98,7 +98,6 @@ chmod +x ./ezdown
 ezctl new k8s-01
 2021-01-19 10:48:23 DEBUG generate custom cluster files in /etc/kubeasz/clusters/k8s-01
 2021-01-19 10:48:23 DEBUG set version of common plugins
-2021-01-19 10:48:23 DEBUG disable registry mirrors
 2021-01-19 10:48:23 DEBUG cluster k8s-01: files successfully created.
 2021-01-19 10:48:23 INFO next steps 1: to config '/etc/kubeasz/clusters/k8s-01/hosts'
 2021-01-19 10:48:23 INFO next steps 2: to config '/etc/kubeasz/clusters/k8s-01/config.yml'
diff --git a/docs/setup/04-install_kube_master.md b/docs/setup/04-install_kube_master.md
index d92f38a..16fc6e8 100644
--- a/docs/setup/04-install_kube_master.md
+++ b/docs/setup/04-install_kube_master.md
@@ -1,4 +1,4 @@
-## 04-安装kube-master节点
+## 04-安装kube_master节点
 
 部署master节点主要包含三个组件`apiserver` `scheduler` `controller-manager`，其中：
 
@@ -39,8 +39,8 @@ roles/kube-master/
   "CN": "kubernetes",
   "hosts": [
     "127.0.0.1",
-{% if groups['ex-lb']|length > 0 %}
-    "{{ hostvars[groups['ex-lb'][0]]['EX_APISERVER_VIP'] }}",
+{% if groups['ex_lb']|length > 0 %}
+    "{{ hostvars[groups['ex_lb'][0]]['EX_APISERVER_VIP'] }}",
 {% endif %}
     "{{ inventory_hostname }}",
     "{{ CLUSTER_KUBERNETES_SVC_IP }}",
@@ -69,7 +69,7 @@ roles/kube-master/
 }
 ```
 - kubernetes 证书既是服务器证书，同时apiserver又作为客户端证书去访问etcd 集群；作为服务器证书需要设置hosts 指定使用该证书的IP 或域名列表，需要注意的是：
-  - 如果配置 ex-lb，需要把 EX_APISERVER_VIP 也配置进去
+  - 如果配置 ex_lb，需要把 EX_APISERVER_VIP 也配置进去
   - 如果需要外部访问 apiserver，需要在 defaults/main.yml 配置 MASTER_CERT_HOSTS
   - `kubectl get svc` 将看到集群中由api-server 创建的默认服务 `kubernetes`，因此也要把 `kubernetes` 服务名和各个服务域名也添加进去
 
@@ -207,10 +207,10 @@ WantedBy=multi-user.target
 
 ``` bash
 # vi 04.kube-master.yml
-- hosts: kube-master
+- hosts: kube_master
   roles:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   # 禁止业务 pod调度到 master节点
   tasks:
   - name: 禁止业务 pod调度到 master节点
diff --git a/docs/setup/05-install_kube_node.md b/docs/setup/05-install_kube_node.md
index 353635a..d721ed3 100644
--- a/docs/setup/05-install_kube_node.md
+++ b/docs/setup/05-install_kube_node.md
@@ -1,9 +1,9 @@
-## 05-安装kube-node节点
+## 05-安装kube_node节点
 
-`kube-node` 是集群中运行工作负载的节点，前置条件需要先部署好`kube-master`节点，它需要部署如下组件：
+`kube_node` 是集群中运行工作负载的节点，前置条件需要先部署好`kube_master`节点，它需要部署如下组件：
 
 + docker：运行容器
-+ kubelet： kube-node上最主要的组件
++ kubelet： kube_node上最主要的组件
 + kube-proxy： 发布应用服务与负载均衡
 + haproxy：用于请求转发到多个 apiserver，详见[HA-2x 架构](00-planning_and_overall_intro.md#ha-architecture)
 + calico： 配置容器网络 (或者其他网络组件)
diff --git a/docs/setup/07-install_cluster_addon.md b/docs/setup/07-install_cluster_addon.md
index 539356c..f8d1d95 100644
--- a/docs/setup/07-install_cluster_addon.md
+++ b/docs/setup/07-install_cluster_addon.md
@@ -13,5 +13,5 @@
 
 ## 下一步
 
-- [创建ex-lb节点组](ex-lb.md), 向集群外提供高可用apiserver
+- [创建ex_lb节点组](ex_lb.md), 向集群外提供高可用apiserver
 - [创建集群持久化存储](08-cluster-storage.md)
diff --git a/docs/setup/ex-lb.md b/docs/setup/ex-lb.md
index c0fd052..352e3a2 100644
--- a/docs/setup/ex-lb.md
+++ b/docs/setup/ex-lb.md
@@ -1,32 +1,17 @@
 ## EX-LB 负载均衡部署
 
-根据[HA 2x架构](00-planning_and_overall_intro.md)，k8s集群自身高可用已经不依赖于外部 lb 服务；但是有时我们要从外部访问 apiserver（比如 CI 流程），就需要 ex-lb 来请求多个 apiserver；
+根据[HA 2x架构](00-planning_and_overall_intro.md)，k8s集群自身高可用已经不依赖于外部 lb 服务；但是有时我们要从外部访问 apiserver（比如 CI 流程），就需要 ex_lb 来请求多个 apiserver；
 
-还有一种情况是需要[负载转发到ingress服务](../op/loadballance_ingress_nodeport.md)，也需要部署ex-lb；
+还有一种情况是需要[负载转发到ingress服务](../op/loadballance_ingress_nodeport.md)，也需要部署ex_lb；
 
-**注意：当遇到公有云环境无法自建 ex-lb 服务时，可以配置对应的云负载均衡服务**
+**注意：当遇到公有云环境无法自建 ex_lb 服务时，可以配置对应的云负载均衡服务**
 
-### ex-lb 服务组件
+### ex_lb 服务组件
 
-ex-lb 服务由 keepalived 和 haproxy 组成：
+ex_lb 服务由 keepalived 和 haproxy 组成：
 - haproxy：高效代理（四层模式）转发到多个 apiserver
 - keepalived：利用主备节点vrrp协议通信和虚拟地址，消除haproxy的单点故障
 
-``` bash
-roles/ex-lb/
-├── clean-ex-lb.yml
-├── defaults
-│   └── main.yml
-├── ex-lb.yml
-├── tasks
-│   └── main.yml
-└── templates
-    ├── haproxy.cfg.j2
-    ├── haproxy.service.j2
-    ├── keepalived-backup.conf.j2
-    └── keepalived-master.conf.j2
-```
-
 Haproxy支持四层和七层负载，稳定性好，根据官方文档，HAProxy可以跑满10Gbps-New benchmark of HAProxy at 10 Gbps using Myricom's 10GbE NICs (Myri-10G PCI-Express)；另外，openstack高可用也有用haproxy的。
 
 keepalived观其名可知，保持存活，它是基于VRRP协议保证所谓的高可用或热备的，这里用来预防haproxy的单点故障。
@@ -44,12 +29,12 @@ keepalived与haproxy配合，实现master的高可用过程如下：
 #### 配置haproxy (roles/ex-lb/templates/haproxy.cfg.j2)
 
 配置由全局配置和三个listen配置组成：
-- listen kube-master 用于转发至多个apiserver
+- listen kube_master 用于转发至多个apiserver
 - listen ingress-node 用于转发至node节点的ingress http服务，[参阅](../op/loadballance_ingress_nodeport.md)
 - listen ingress-node-tls 用于转发至node节点的ingress https服务
 
 如果用apt安装的话，可以在/usr/share/doc/haproxy目录下找到配置指南configuration.txt.gz，全局和默认配置这里不展开，关注`listen` 代理设置模块，各项配置说明：
-+ 名称 kube-master
++ 名称 kube_master
 + bind 监听客户端请求的地址/端口，保证监听master的VIP地址和端口
 + mode 选择四层负载模式 (当然你也可以选择七层负载，请查阅指南，适当调整)
 + balance 选择负载算法 (负载算法也有很多供选择)
@@ -71,12 +56,12 @@ vrrp_script check-haproxy {
     weight -60
 }
 
-vrrp_instance VI-kube-master {
+vrrp_instance VI-kube_master {
     state MASTER
     priority 120
     unicast_src_ip {{ inventory_hostname }}
     unicast_peer {
-{% for h in groups['ex-lb'] %}{% if h != inventory_hostname %}
+{% for h in groups['ex_lb'] %}{% if h != inventory_hostname %}
         {{ h }}
 {% endif %}{% endfor %}
     }
diff --git a/docs/setup/ezctl.md b/docs/setup/ezctl.md
index 1107fdc..6807884 100644
--- a/docs/setup/ezctl.md
+++ b/docs/setup/ezctl.md
@@ -68,12 +68,11 @@ Use "ezctl help <command>" for more information about a given command.
 ~# ezctl new k8s-01
 2021-01-19 10:48:23 DEBUG generate custom cluster files in /etc/kubeasz/clusters/k8s-01
 2021-01-19 10:48:23 DEBUG set version of common plugins
-2021-01-19 10:48:23 DEBUG disable registry mirrors
 2021-01-19 10:48:23 DEBUG cluster k8s-01: files successfully created.
 2021-01-19 10:48:23 INFO next steps 1: to config '/etc/kubeasz/clusters/k8s-01/hosts'
 2021-01-19 10:48:23 INFO next steps 2: to config '/etc/kubeasz/clusters/k8s-01/config.yml'
 ```
-然后根据提示配置'/etc/kubeasz/clusters/k8s-01/hosts' 和 '/etc/kubeasz/clusters/k8s-01/config.yml'；为方便测试我们在hosts里面设置单节点集群（etcd/kube-master/kube-node配置同一个节点，注意节点需先设置ssh免密码登陆）, config.yml 使用默认配置即可。
+然后根据提示配置'/etc/kubeasz/clusters/k8s-01/hosts' 和 '/etc/kubeasz/clusters/k8s-01/config.yml'；为方便测试我们在hosts里面设置单节点集群（etcd/kube_master/kube_node配置同一个节点，注意节点需先设置ssh免密码登陆）, config.yml 使用默认配置即可。
 
 - 2.然后开始安装集群
 
diff --git a/docs/setup/network-plugin/calico.md b/docs/setup/network-plugin/calico.md
index 42e9cb4..70d91ae 100644
--- a/docs/setup/network-plugin/calico.md
+++ b/docs/setup/network-plugin/calico.md
@@ -60,9 +60,9 @@ roles/calico/
 
 + 安装前检查主机名不能有大写字母，只能由`小写字母` `-` `.` 组成 (name must consist of lower case alphanumeric characters, '-' or '.' (regex: [a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*))(calico-node v3.0.6以上已经解决主机大写字母问题)
 + **安装前必须确保各节点主机名不重复** ，calico node name 由节点主机名决定，如果重复，那么重复节点在etcd中只存储一份配置，BGP 邻居也不会建立。
-+ 安装之前必须确保`kube-master`和`kube-node`节点已经成功部署
++ 安装之前必须确保`kube_master`和`kube_node`节点已经成功部署
 + 只需要在任意装有kubectl客户端的节点运行 `kubectl apply -f`安装即可
-+ 等待15s后(视网络拉取calico相关镜像速度)，calico 网络插件安装完成，删除之前kube-node安装时默认cni网络配置
++ 等待15s后(视网络拉取calico相关镜像速度)，calico 网络插件安装完成，删除之前kube_node安装时默认cni网络配置
 
 ### [可选]配置calicoctl工具 [calicoctl.cfg.j2](roles/calico/templates/calicoctl.cfg.j2)
 
diff --git a/docs/setup/network-plugin/flannel.md b/docs/setup/network-plugin/flannel.md
index 4d7cae4..7fc1eb7 100644
--- a/docs/setup/network-plugin/flannel.md
+++ b/docs/setup/network-plugin/flannel.md
@@ -86,9 +86,9 @@ FLANNEL_IPMASQ=true
 ```
 ### 安装 flannel网络
 
-+ 安装之前必须确保kube-master和kube-node节点已经成功部署
++ 安装之前必须确保kube_master和kube_node节点已经成功部署
 + 只需要在任意装有kubectl客户端的节点运行 kubectl create安装即可
-+ 等待15s后(视网络拉取相关镜像速度)，flannel 网络插件安装完成，删除之前kube-node安装时默认cni网络配置
++ 等待15s后(视网络拉取相关镜像速度)，flannel 网络插件安装完成，删除之前kube_node安装时默认cni网络配置
 
 ### 验证flannel网络
 
diff --git a/example/config.yml b/example/config.yml
index 3219863..ac08234 100644
--- a/example/config.yml
+++ b/example/config.yml
@@ -113,7 +113,7 @@ flannel_offline: "flannel_{{ flannelVer }}.tar"
 CALICO_IPV4POOL_IPIP: "Always"
 
 # [calico]设置 calico-node使用的host IP，bgp邻居通过该地址建立，可手工指定也可以自动发现
-IP_AUTODETECTION_METHOD: "can-reach={{ groups['kube-master'][0] }}"
+IP_AUTODETECTION_METHOD: "can-reach={{ groups['kube_master'][0] }}"
 
 # [calico]设置calico 网络 backend: brid, vxlan, none
 CALICO_NETWORKING_BACKEND: "brid"
@@ -139,7 +139,7 @@ cilium_offline: "cilium_{{ cilium_ver }}.tar"
 
 # ------------------------------------------- kube-ovn
 # [kube-ovn]选择 OVN DB and OVN Control Plane 节点，默认为第一个master节点
-OVN_DB_NODE: "{{ groups['kube-master'][0] }}"
+OVN_DB_NODE: "{{ groups['kube_master'][0] }}"
 
 # [kube-ovn]离线镜像tar包
 kube_ovn_ver: "__kube_ovn__"
diff --git a/example/hosts.allinone b/example/hosts.allinone
index e99361b..e310395 100644
--- a/example/hosts.allinone
+++ b/example/hosts.allinone
@@ -3,11 +3,11 @@
 192.168.1.1
 
 # master node(s)
-[kube-master]
+[kube_master]
 192.168.1.1
 
 # work node(s)
-[kube-node]
+[kube_node]
 192.168.1.1
 
 # [optional] harbor server, a private docker registry
@@ -17,7 +17,7 @@
 #192.168.1.8 HARBOR_DOMAIN="harbor.yourdomain.com" NEW_INSTALL=no SELF_SIGNED_CERT=yes
 
 # [optional] loadbalance for accessing k8s from outside
-[ex-lb]
+[ex_lb]
 #192.168.1.6 LB_ROLE=backup EX_APISERVER_VIP=192.168.1.250 EX_APISERVER_PORT=8443
 #192.168.1.7 LB_ROLE=master EX_APISERVER_VIP=192.168.1.250 EX_APISERVER_PORT=8443
 
diff --git a/example/hosts.multi-node b/example/hosts.multi-node
index 0c538fa..c4977d3 100644
--- a/example/hosts.multi-node
+++ b/example/hosts.multi-node
@@ -5,12 +5,12 @@
 192.168.1.3
 
 # master node(s)
-[kube-master]
+[kube_master]
 192.168.1.1
 192.168.1.2
 
 # work node(s)
-[kube-node]
+[kube_node]
 192.168.1.3
 192.168.1.4
 
@@ -21,7 +21,7 @@
 #192.168.1.8 HARBOR_DOMAIN="harbor.yourdomain.com" NEW_INSTALL=no SELF_SIGNED_CERT=yes
 
 # [optional] loadbalance for accessing k8s from outside
-[ex-lb]
+[ex_lb]
 #192.168.1.6 LB_ROLE=backup EX_APISERVER_VIP=192.168.1.250 EX_APISERVER_PORT=8443
 #192.168.1.7 LB_ROLE=master EX_APISERVER_VIP=192.168.1.250 EX_APISERVER_PORT=8443
 
diff --git a/ezctl b/ezctl
index e5ccc3c..02731a3 100755
--- a/ezctl
+++ b/ezctl
@@ -294,10 +294,10 @@ function add-node() {
     [[ $2 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { logger error "Invalid ip add:$2"; return 1; }
 
     # check if the new node already exsited
-    sed -n '/^\[kube-master/,/^\[harbor/p' "$BASE/clusters/$1/hosts"|grep "^$2[^0-9]*$" && { logger error "node $2 already existed in $BASE/clusters/$1/hosts"; return 2; }
+    sed -n '/^\[kube_master/,/^\[harbor/p' "$BASE/clusters/$1/hosts"|grep "^$2[^0-9]*$" && { logger error "node $2 already existed in $BASE/clusters/$1/hosts"; return 2; }
 
-    logger info "add $2 into 'kube-node' group"
-    sed -i "/\[kube-node/a $2 NEW_NODE=yes ${@:3}" "$BASE/clusters/$1/hosts"
+    logger info "add $2 into 'kube_node' group"
+    sed -i "/\[kube_node/a $2 NEW_NODE=yes ${@:3}" "$BASE/clusters/$1/hosts"
 
     logger info "start to add a work node:$2 into cluster:$1"
     ansible-playbook -i "$BASE/clusters/$1/hosts" "$BASE/playbooks/22.addnode.yml" -e "NODE_TO_ADD=$2" -e "@clusters/$1/config.yml"
@@ -308,15 +308,15 @@ function add-master() {
     [[ $2 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { logger error  "Invalid ip add:$2"; return 1; }
 
     # check if the new master already exsited
-    sed -n '/^\[kube-master/,/^\[kube-node/p' "$BASE/clusters/$1/hosts"|grep "^$2[^0-9]*$" && { logger error "master $2 already existed!"; return 2; }
+    sed -n '/^\[kube_master/,/^\[kube_node/p' "$BASE/clusters/$1/hosts"|grep "^$2[^0-9]*$" && { logger error "master $2 already existed!"; return 2; }
 
-    logger info "add $2 into 'kube-master' group"
-    sed -i "/\[kube-master/a $2 NEW_MASTER=yes ${@:3}" "$BASE/clusters/$1/hosts"
+    logger info "add $2 into 'kube_master' group"
+    sed -i "/\[kube_master/a $2 NEW_MASTER=yes ${@:3}" "$BASE/clusters/$1/hosts"
 
     logger info "start to add a master node:$2 into cluster:$1"
     ansible-playbook -i "$BASE/clusters/$1/hosts" "$BASE/playbooks/23.addmaster.yml" -e "NODE_TO_ADD=$2" -e "@clusters/$1/config.yml"
 
-    logger info "reconfigure and restart the haproxy service on 'kube-node' nodes"
+    logger info "reconfigure and restart the haproxy service on 'kube_node' nodes"
     ansible-playbook -i "$BASE/clusters/$1/hosts" "$BASE/playbooks/05.kube-node.yml" -t restart_lb -e MASTER_CHG=yes -e "@clusters/$1/config.yml" 
 }
 
@@ -325,7 +325,7 @@ function add-etcd() {
     [[ $2 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { logger error  "Invalid ip add:$2"; return 1; }
 
     # check if the new node already exsited
-    sed -n '/^\[etcd/,/^\[kube-master/p' "$BASE/clusters/$1/hosts"|grep "^$2[^0-9]*$" && { logger error "etcd $2 already existed!"; return 2; }
+    sed -n '/^\[etcd/,/^\[kube_master/p' "$BASE/clusters/$1/hosts"|grep "^$2[^0-9]*$" && { logger error "etcd $2 already existed!"; return 2; }
 
     logger info "add $2 into 'etcd' group"
     sed -i "/\[etcd/a $2 NEW_ETCD=yes ${@:3}" "$BASE/clusters/$1/hosts" 
@@ -372,7 +372,7 @@ function del-master() {
     logger info "reconfig kubeconfig in ansible manage node"
     ansible-playbook -i "$BASE/clusters/$1/hosts" "$BASE/roles/deploy/deploy.yml" -t create_kctl_cfg -e "@clusters/$1/config.yml"
 
-    logger info "reconfigure and restart the haproxy service on 'kube-node' nodes"
+    logger info "reconfigure and restart the haproxy service on 'kube_node' nodes"
     ansible-playbook -i "$BASE/clusters/$1/hosts" "$BASE/playbooks/05.kube-node.yml" -t restart_lb -e MASTER_CHG=yes -e "@clusters/$1/config.yml" 
 }
 
diff --git a/playbooks/01.prepare.yml b/playbooks/01.prepare.yml
index 2295065..66c3b43 100644
--- a/playbooks/01.prepare.yml
+++ b/playbooks/01.prepare.yml
@@ -1,9 +1,9 @@
 # [optional] to synchronize system time of nodes with 'chrony' 
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   - etcd
-  - ex-lb
+  - ex_lb
   - chrony
   roles:
   - { role: chrony, when: "groups['chrony']|length > 0" }
@@ -15,8 +15,8 @@
 
 # prepare tasks for all nodes
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   - etcd
   roles:
   - prepare
diff --git a/playbooks/03.runtime.yml b/playbooks/03.runtime.yml
index d0eaa55..2d9a8cd 100644
--- a/playbooks/03.runtime.yml
+++ b/playbooks/03.runtime.yml
@@ -1,7 +1,7 @@
 # to install a container runtime
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   roles:
   - { role: docker, when: "CONTAINER_RUNTIME == 'docker'" }
   - { role: containerd, when: "CONTAINER_RUNTIME == 'containerd'" }
diff --git a/playbooks/04.kube-master.yml b/playbooks/04.kube-master.yml
index 5de1714..e8812ce 100644
--- a/playbooks/04.kube-master.yml
+++ b/playbooks/04.kube-master.yml
@@ -1,12 +1,12 @@
-# to set up 'kube-master' nodes
-- hosts: kube-master
+# to set up 'kube_master' nodes
+- hosts: kube_master
   roles:
   - kube-master
   - kube-node
   tasks:
   - name: Making master nodes SchedulingDisabled
     shell: "{{ bin_dir }}/kubectl cordon {{ inventory_hostname }} "
-    when: "inventory_hostname not in groups['kube-node']"
+    when: "inventory_hostname not in groups['kube_node']"
     ignore_errors: true
 
   - name: Setting master role name 
diff --git a/playbooks/05.kube-node.yml b/playbooks/05.kube-node.yml
index caf2a95..933385f 100644
--- a/playbooks/05.kube-node.yml
+++ b/playbooks/05.kube-node.yml
@@ -1,4 +1,4 @@
-# to set up 'kube-node' nodes
-- hosts: kube-node
+# to set up 'kube_node' nodes
+- hosts: kube_node
   roles:
-  - { role: kube-node, when: "inventory_hostname not in groups['kube-master']" } 
+  - { role: kube-node, when: "inventory_hostname not in groups['kube_master']" } 
diff --git a/playbooks/06.network.yml b/playbooks/06.network.yml
index c6e5e27..339dc99 100644
--- a/playbooks/06.network.yml
+++ b/playbooks/06.network.yml
@@ -1,7 +1,7 @@
 # to install network plugin, only one can be choosen 
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   roles:
   - { role: calico, when: "CLUSTER_NETWORK == 'calico'" }
   - { role: cilium, when: "CLUSTER_NETWORK == 'cilium'" }
diff --git a/playbooks/07.cluster-addon.yml b/playbooks/07.cluster-addon.yml
index efe756f..6f29173 100644
--- a/playbooks/07.cluster-addon.yml
+++ b/playbooks/07.cluster-addon.yml
@@ -1,5 +1,5 @@
 # to install clust-addons
 - hosts:
-  - kube-node 
+  - kube_node 
   roles:
   - cluster-addon
diff --git a/playbooks/11.harbor.yml b/playbooks/11.harbor.yml
index 76bf37e..f86af13 100644
--- a/playbooks/11.harbor.yml
+++ b/playbooks/11.harbor.yml
@@ -16,8 +16,8 @@
     when: hostvars[groups.harbor[0]]['SELF_SIGNED_CERT'] == 'yes'
 
 - hosts: 
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   tasks:
   - name: Define 'harbor_hostname', a domain name
     set_fact: harbor_hostname={{ hostvars[groups.harbor[0]]['HARBOR_DOMAIN'] }}
diff --git a/playbooks/23.addmaster.yml b/playbooks/23.addmaster.yml
index dfc77aa..454b340 100644
--- a/playbooks/23.addmaster.yml
+++ b/playbooks/23.addmaster.yml
@@ -17,7 +17,7 @@
   tasks:
   - name: Making master nodes SchedulingDisabled
     shell: "{{ bin_dir }}/kubectl cordon {{ NODE_TO_ADD }} "
-    when: "inventory_hostname not in groups['kube-node']"
+    when: "inventory_hostname not in groups['kube_node']"
     ignore_errors: true
 
   - name: Setting master role name
diff --git a/playbooks/31.deletcd.yml b/playbooks/31.deletcd.yml
index bc00ffd..3a86bc9 100644
--- a/playbooks/31.deletcd.yml
+++ b/playbooks/31.deletcd.yml
@@ -73,7 +73,7 @@
 
     # lineinfile is inadequate to delete lines between some specific line range
     - name: remove the etcd's node entry in hosts
-      shell: 'sed -i "/^\[etcd/,/^\[kube-master/ {/^{{ ETCD_TO_DEL }}[^0-9]/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
+      shell: 'sed -i "/^\[etcd/,/^\[kube_master/ {/^{{ ETCD_TO_DEL }}[^0-9]/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
       args:
         warn: false
     when: "groups['etcd']|length > 1 and ETCD_TO_DEL in groups['etcd']" 
diff --git a/playbooks/32.delnode.yml b/playbooks/32.delnode.yml
index 8b3ca35..231b9fb 100644
--- a/playbooks/32.delnode.yml
+++ b/playbooks/32.delnode.yml
@@ -2,8 +2,8 @@
 
 - hosts: localhost 
   tasks:
-  - fail: msg="you CAN NOT delete the last member of kube-master!"
-    when: "groups['kube-master']|length < 2 and NODE_TO_DEL in groups['kube-master']"
+  - fail: msg="you CAN NOT delete the last member of kube_master!"
+    when: "groups['kube_master']|length < 2 and NODE_TO_DEL in groups['kube_master']"
 
   - name: run kubectl drain @{{ NODE_TO_DEL }}
     shell: "{{ base_dir }}/bin/kubectl drain {{ NODE_TO_DEL }} --ignore-daemonsets --delete-emptydir-data --force"
@@ -26,6 +26,6 @@
 
   # lineinfile is inadequate to delete lines between some specific line range
   - name: remove the node's entry in hosts
-    shell: 'sed -i "/^\[kube-node/,/^\[harbor/ {/^{{ NODE_TO_DEL }}[^0-9]*$/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
+    shell: 'sed -i "/^\[kube_node/,/^\[harbor/ {/^{{ NODE_TO_DEL }}[^0-9]*$/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
     args:
       warn: false
diff --git a/playbooks/33.delmaster.yml b/playbooks/33.delmaster.yml
index a6c17c6..49611e4 100644
--- a/playbooks/33.delmaster.yml
+++ b/playbooks/33.delmaster.yml
@@ -1,9 +1,9 @@
-# WARNNING:  this playbook will clean the kube-master node {{ NODE_TO_DEL }}
+# WARNNING:  this playbook will clean the kube_master node {{ NODE_TO_DEL }}
 
 - hosts: localhost
   tasks:
-  - fail: msg="you CAN NOT delete the last member of kube-master!"
-    when: "groups['kube-master']|length < 2 and NODE_TO_DEL in groups['kube-master']"
+  - fail: msg="you CAN NOT delete the last member of kube_master!"
+    when: "groups['kube_master']|length < 2 and NODE_TO_DEL in groups['kube_master']"
 
   - name: run kubectl drain @{{ NODE_TO_DEL }}
     shell: "{{ base_dir }}/bin/kubectl drain {{ NODE_TO_DEL }} --ignore-daemonsets --delete-emptydir-data --force" 
@@ -27,6 +27,6 @@
 
   # lineinfile is inadequate to delete lines between some specific line range
   - name: remove the master's entry in hosts
-    shell: 'sed -i "/^\[kube-master/,/^\[harbor/ {/^{{ NODE_TO_DEL }}[^0-9]*$/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
+    shell: 'sed -i "/^\[kube_master/,/^\[harbor/ {/^{{ NODE_TO_DEL }}[^0-9]*$/d}" {{ base_dir }}/clusters/{{ CLUSTER }}/hosts'
     args:
       warn: false
diff --git a/playbooks/90.setup.yml b/playbooks/90.setup.yml
index 12edc16..d27c5f5 100644
--- a/playbooks/90.setup.yml
+++ b/playbooks/90.setup.yml
@@ -1,9 +1,9 @@
 # [optional] to synchronize time of nodes with 'chrony'
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   - etcd
-  - ex-lb
+  - ex_lb
   - chrony
   roles:
   - { role: chrony, when: "groups['chrony']|length > 0" }
@@ -15,8 +15,8 @@
 
 # prepare tasks for all nodes
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   - etcd
   roles:
   - prepare
@@ -28,36 +28,36 @@
 
 # to install container runtime
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   roles:
   - { role: docker, when: "CONTAINER_RUNTIME == 'docker'" }
   - { role: containerd, when: "CONTAINER_RUNTIME == 'containerd'" }
 
-# to set up 'kube-master' nodes
-- hosts: kube-master
+# to set up 'kube_master' nodes
+- hosts: kube_master
   roles:
   - kube-master
   - kube-node
   tasks:
   - name: Making master nodes SchedulingDisabled
     shell: "{{ bin_dir }}/kubectl cordon {{ inventory_hostname }} "
-    when: "inventory_hostname not in groups['kube-node']" 
+    when: "inventory_hostname not in groups['kube_node']" 
     ignore_errors: true
 
   - name: Setting master role name
     shell: "{{ bin_dir }}/kubectl label node {{ inventory_hostname }} kubernetes.io/role=master --overwrite"
     ignore_errors: true
 
-# to set up 'kube-node' nodes
-- hosts: kube-node
+# to set up 'kube_node' nodes
+- hosts: kube_node
   roles:
-  - { role: kube-node, when: "inventory_hostname not in groups['kube-master']" }
+  - { role: kube-node, when: "inventory_hostname not in groups['kube_master']" }
 
 # to install network plugin, only one can be choosen
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   roles:
   - { role: calico, when: "CLUSTER_NETWORK == 'calico'" }
   - { role: cilium, when: "CLUSTER_NETWORK == 'cilium'" }
@@ -67,6 +67,6 @@
 
 # to install cluster-addons
 - hosts:
-  - kube-node
+  - kube_node
   roles:
   - cluster-addon
diff --git a/playbooks/91.start.yml b/playbooks/91.start.yml
index 2df0787..defaf9a 100644
--- a/playbooks/91.start.yml
+++ b/playbooks/91.start.yml
@@ -3,9 +3,9 @@
   - name: starting etcd cluster
     service: name=etcd state=started enabled=yes
 
-- hosts: kube-master
+- hosts: kube_master
   tasks:
-  - name: starting kube-master services
+  - name: starting kube_master services
     service: name={{ item }} state=started enabled=yes
     with_items:
     - kube-apiserver
@@ -13,8 +13,8 @@
     - kube-scheduler
 
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   tasks:
   - name: starting docker
     service: name=docker state=started enabled=yes
@@ -24,19 +24,19 @@
     service: name=containerd state=started enabled=yes
     when: "CONTAINER_RUNTIME == 'containerd'"
 
-  - name: starting haproxy on kube-node
+  - name: starting haproxy on kube_node
     service: name=haproxy state=started enabled=yes
     when: 
-    - "inventory_hostname not in groups['kube-master']"
-    - "groups['kube-master']|length > 1"
+    - "inventory_hostname not in groups['kube_master']"
+    - "groups['kube_master']|length > 1"
 
-  - name: starting kube-node services
+  - name: starting kube_node services
     service: name={{ item }} state=started enabled=yes
     with_items:
     - kubelet
     - kube-proxy
 
-- hosts: ex-lb
+- hosts: ex_lb
   tasks:
   - name: starting external loadbalance
     service: name={{ item }} state=started enabled=yes
diff --git a/playbooks/92.stop.yml b/playbooks/92.stop.yml
index 8cb7ab9..b60ce78 100644
--- a/playbooks/92.stop.yml
+++ b/playbooks/92.stop.yml
@@ -1,6 +1,6 @@
-- hosts: kube-master
+- hosts: kube_master
   tasks:
-  - name: stopping kube-master services
+  - name: stopping kube_master services
     service: name={{ item }} state=stopped enabled=no
     with_items:
     - kube-apiserver
@@ -12,7 +12,7 @@
   - name: stopping etcd cluster
     service: name=etcd state=stopped enabled=no
 
-- hosts: ex-lb
+- hosts: ex_lb
   tasks:
   - name: stopping external loadbalance
     service: name={{ item }} state=stopped enabled=no
@@ -21,16 +21,16 @@
     - keepalived
 
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   tasks:
-  - name: stopping haproxy on kube-node
+  - name: stopping haproxy on kube_node
     service: name=haproxy state=stopped enabled=no
     when: 
-    - "inventory_hostname not in groups['kube-master']"
-    - "groups['kube-master']|length > 1"
+    - "inventory_hostname not in groups['kube_master']"
+    - "groups['kube_master']|length > 1"
 
-  - name: stopping kube-node services
+  - name: stopping kube_node services
     service: name={{ item }} state=stopped enabled=no
     with_items:
     - kubelet
diff --git a/playbooks/93.upgrade.yml b/playbooks/93.upgrade.yml
index 79b65f4..919310d 100644
--- a/playbooks/93.upgrade.yml
+++ b/playbooks/93.upgrade.yml
@@ -3,7 +3,7 @@
 # Usage: ezctl upgrade <cluster_name>
 
 # check k8s version
-- hosts: kube-master
+- hosts: kube_master
   tasks:
   - name: get running k8s version
     shell: "{{ bin_dir }}/kube-apiserver --version"
@@ -30,13 +30,13 @@
 
 # update masters
 - hosts: 
-  - kube-master
+  - kube_master
   roles:
   - kube-master
   - kube-node
 
 # update nodes
 - hosts: 
-  - kube-node
+  - kube_node
   roles:
-  - { role: kube-node, when: "inventory_hostname not in groups['kube-master']" }
+  - { role: kube-node, when: "inventory_hostname not in groups['kube_master']" }
diff --git a/playbooks/99.clean.yml b/playbooks/99.clean.yml
index 24ea2c9..22063c7 100644
--- a/playbooks/99.clean.yml
+++ b/playbooks/99.clean.yml
@@ -2,9 +2,9 @@
 # Make sure you know what you are doing.
 
 - hosts:
-  - kube-master
-  - kube-node
-  - ex-lb
+  - kube_master
+  - kube_node
+  - ex_lb
   - etcd
   vars:
     DEL_MASTER: "yes"
diff --git a/roles/chrony/chrony.yml b/roles/chrony/chrony.yml
index 0887931..8868379 100644
--- a/roles/chrony/chrony.yml
+++ b/roles/chrony/chrony.yml
@@ -1,8 +1,8 @@
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   - etcd
-  - ex-lb
+  - ex_lb
   - chrony
   roles:
   - { role: chrony, when: "groups['chrony']|length > 0" }
diff --git a/roles/cilium/cilium.yml b/roles/cilium/cilium.yml
index 5e84dbb..1a8529c 100644
--- a/roles/cilium/cilium.yml
+++ b/roles/cilium/cilium.yml
@@ -1,5 +1,5 @@
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   roles:
   - cilium
diff --git a/roles/clean/defaults/main.yml b/roles/clean/defaults/main.yml
index d92f3d3..8207962 100644
--- a/roles/clean/defaults/main.yml
+++ b/roles/clean/defaults/main.yml
@@ -1,7 +1,7 @@
-# 是否删除 kube-master 相关服务
+# 是否删除 kube_master 相关服务
 DEL_MASTER: "no"
 
-# 是否删除 kube-node 相关服务
+# 是否删除 kube_node 相关服务
 DEL_NODE: "no"
 
 # 是否删除 etc 相关服务
diff --git a/roles/clean/tasks/clean_lb.yml b/roles/clean/tasks/clean_lb.yml
index 5acca40..ba6fe15 100644
--- a/roles/clean/tasks/clean_lb.yml
+++ b/roles/clean/tasks/clean_lb.yml
@@ -12,4 +12,4 @@
     with_items:
     - "/etc/haproxy"
     - "/etc/keepalived"
-  when: "inventory_hostname in groups['kube-node'] or inventory_hostname in groups['ex-lb']"
+  when: "inventory_hostname in groups['kube_node'] or inventory_hostname in groups['ex_lb']"
diff --git a/roles/clean/tasks/clean_master.yml b/roles/clean/tasks/clean_master.yml
index 682b1bf..0fb90ab 100644
--- a/roles/clean/tasks/clean_master.yml
+++ b/roles/clean/tasks/clean_master.yml
@@ -1,18 +1,18 @@
-# to clean 'kube-master' nodes
-- name: stop and disable kube-master service
+# to clean 'kube_master' nodes
+- name: stop and disable kube_master service
   service: name={{ item }} state=stopped enabled=no
   with_items:
   - kube-apiserver
   - kube-controller-manager
   - kube-scheduler
   ignore_errors: true
-  when: "inventory_hostname in groups['kube-master']"
+  when: "inventory_hostname in groups['kube_master']"
 
-- name: remove files and dirs of 'kube-master' nodes
+- name: remove files and dirs of 'kube_master' nodes
   file: name={{ item }} state=absent
   with_items:
   - "/var/run/kubernetes"
   - "/etc/systemd/system/kube-apiserver.service"
   - "/etc/systemd/system/kube-controller-manager.service"
   - "/etc/systemd/system/kube-scheduler.service"
-  when: "inventory_hostname in groups['kube-master']"
+  when: "inventory_hostname in groups['kube_master']"
diff --git a/roles/clean/tasks/clean_node.yml b/roles/clean/tasks/clean_node.yml
index 85f06c2..e22f98d 100644
--- a/roles/clean/tasks/clean_node.yml
+++ b/roles/clean/tasks/clean_node.yml
@@ -1,6 +1,6 @@
-# to clean 'kube-node' nodes
+# to clean 'kube_node' nodes
 - block:
-  - name: stop and disable kube-node service
+  - name: stop and disable kube_node service
     service: name={{ item }} state=stopped enabled=no
     with_items:
     - kubelet
@@ -13,7 +13,7 @@
       warn: false
     ignore_errors: true
 
-  - name: remove files and dirs of 'kube-node' nodes
+  - name: remove files and dirs of 'kube_node' nodes
     file: name={{ item }} state=absent
     with_items:
     - "/var/lib/kubelet/"
@@ -160,4 +160,4 @@
 #        && iptables -F -t raw && iptables -X -t raw \
 #        && iptables -F -t mangle && iptables -X -t mangle"
 
-  when: "inventory_hostname in groups['kube-master'] or inventory_hostname in groups['kube-node']"
+  when: "inventory_hostname in groups['kube_master'] or inventory_hostname in groups['kube_node']"
diff --git a/roles/cluster-addon/templates/prometheus/values.yaml.j2 b/roles/cluster-addon/templates/prometheus/values.yaml.j2
index eb13c78..afd3f6b 100644
--- a/roles/cluster-addon/templates/prometheus/values.yaml.j2
+++ b/roles/cluster-addon/templates/prometheus/values.yaml.j2
@@ -58,7 +58,7 @@ kubelet:
 kubeControllerManager:
   enabled: true
   endpoints:
-{% for h in groups['kube-master'] %}
+{% for h in groups['kube_master'] %}
   - {{ h }}
 {% endfor %}
 
@@ -89,7 +89,7 @@ kubeEtcd:
 kubeScheduler:
   enabled: true
   endpoints:
-{% for h in groups['kube-master'] %}
+{% for h in groups['kube_master'] %}
   - {{ h }}
 {% endfor %}
 
@@ -97,11 +97,11 @@ kubeScheduler:
 kubeProxy:
   enabled: true
   endpoints:
-{% for h in groups['kube-master'] %}
+{% for h in groups['kube_master'] %}
   - {{ h }}
 {% endfor %}
-{% for h in groups['kube-node'] %}
-{% if h not in groups['kube-master'] %}
+{% for h in groups['kube_node'] %}
+{% if h not in groups['kube_master'] %}
   - {{ h }}
 {% endif %}
 {% endfor %}
diff --git a/roles/deploy/tasks/main.yml b/roles/deploy/tasks/main.yml
index 30c55a1..056905d 100644
--- a/roles/deploy/tasks/main.yml
+++ b/roles/deploy/tasks/main.yml
@@ -46,8 +46,11 @@
 - import_tasks: create-kube-scheduler-kubeconfig.yml
 
 # ansible 控制端一些易用性配置
-- name: 本地创建 ezctl 工具的软连接
-  file: src={{ base_dir }}/ezctl dest=/usr/bin/ezctl state=link
+- name: 本地创建 ezdown/ezctl 工具的软连接
+  file: src={{ base_dir }}/{{ item }} dest=/usr/bin/{{ item }} state=link
+  with_items:
+  - ezdown
+  - ezctl
 
 - name: ansible 控制端创建 kubectl 软链接
   file: src={{ base_dir }}/bin/kubectl dest=/usr/bin/kubectl state=link
diff --git a/roles/deploy/vars/main.yml b/roles/deploy/vars/main.yml
index d1e0eaa..9a8b00a 100644
--- a/roles/deploy/vars/main.yml
+++ b/roles/deploy/vars/main.yml
@@ -1,5 +1,5 @@
 # apiserver 默认第一个master节点
-KUBE_APISERVER: "https://{{ groups['kube-master'][0] }}:6443"
+KUBE_APISERVER: "https://{{ groups['kube_master'][0] }}:6443"
 
 #
 ADD_KCFG: false
diff --git a/roles/ex-lb/clean-ex-lb.yml b/roles/ex-lb/clean-ex-lb.yml
index b24972c..804354d 100644
--- a/roles/ex-lb/clean-ex-lb.yml
+++ b/roles/ex-lb/clean-ex-lb.yml
@@ -1,5 +1,5 @@
 - hosts:
-  - ex-lb
+  - ex_lb
   tasks:
   - block:
       - name: stop and disable chrony in Ubuntu
diff --git a/roles/ex-lb/ex-lb.yml b/roles/ex-lb/ex-lb.yml
index e351ace..7b9b256 100644
--- a/roles/ex-lb/ex-lb.yml
+++ b/roles/ex-lb/ex-lb.yml
@@ -1,3 +1,3 @@
-- hosts: ex-lb
+- hosts: ex_lb
   roles:
   - ex-lb
diff --git a/roles/ex-lb/tasks/main.yml b/roles/ex-lb/tasks/main.yml
index 9418ae4..2401130 100644
--- a/roles/ex-lb/tasks/main.yml
+++ b/roles/ex-lb/tasks/main.yml
@@ -1,7 +1,7 @@
-# ex-lb 节点成员不能同时是 kube-node 节点，因为它们都需要安装 haproxy
+# ex_lb 节点成员不能同时是 kube_node 节点，因为它们都需要安装 haproxy
 - name: fail info1
-  fail: msg="an 'ex-lb' node CAN NOT be a 'kube-node' node at the same time"
-  when: "inventory_hostname in groups['kube-node']"
+  fail: msg="an 'ex_lb' node CAN NOT be a 'kube_node' node at the same time"
+  when: "inventory_hostname in groups['kube_node']"
 
 # 自动设置LB节点变量'LB_IF'
 - name: 注册变量 LB_IF_TMP
diff --git a/roles/ex-lb/templates/haproxy.cfg.j2 b/roles/ex-lb/templates/haproxy.cfg.j2
index 732b1ab..b8df0a6 100644
--- a/roles/ex-lb/templates/haproxy.cfg.j2
+++ b/roles/ex-lb/templates/haproxy.cfg.j2
@@ -13,14 +13,14 @@ defaults
         timeout client  10m
         timeout server  10m
 
-listen kube-master
+listen kube_master
         bind 0.0.0.0:{{ EX_APISERVER_PORT }}
         mode tcp
         option tcplog
         option dontlognull
         option dontlog-normal
         balance {{ BALANCE_ALG }}
-{% for host in groups['kube-master'] %}
+{% for host in groups['kube_master'] %}
         server {{ host }} {{ host }}:6443 check inter 5s fall 2 rise 2 weight 1
 {% endfor %}
 
@@ -32,12 +32,12 @@ listen ingress-node
         option dontlognull
         option dontlog-normal
         balance {{ BALANCE_ALG }}
-{% if groups['kube-node']|length > 3 %}
-        server {{ groups['kube-node'][0] }} {{ groups['kube-node'][0] }}:23456 check inter 5s fall 2 rise 2 weight 1
-        server {{ groups['kube-node'][1] }} {{ groups['kube-node'][1] }}:23456 check inter 5s fall 2 rise 2 weight 1
-        server {{ groups['kube-node'][2] }} {{ groups['kube-node'][2] }}:23456 check inter 5s fall 2 rise 2 weight 1
+{% if groups['kube_node']|length > 3 %}
+        server {{ groups['kube_node'][0] }} {{ groups['kube_node'][0] }}:23456 check inter 5s fall 2 rise 2 weight 1
+        server {{ groups['kube_node'][1] }} {{ groups['kube_node'][1] }}:23456 check inter 5s fall 2 rise 2 weight 1
+        server {{ groups['kube_node'][2] }} {{ groups['kube_node'][2] }}:23456 check inter 5s fall 2 rise 2 weight 1
 {% else %}
-{% for host in groups['kube-node'] %}
+{% for host in groups['kube_node'] %}
         server {{ host }} {{ host }}:23456 check inter 5s fall 2 rise 2 weight 1
 {% endfor %}
 {% endif %}
@@ -51,12 +51,12 @@ listen ingress-node-tls
         option dontlognull
         option dontlog-normal
         balance {{ BALANCE_ALG }}
-{% if groups['kube-node']|length > 3 %}
-        server {{ groups['kube-node'][0] }} {{ groups['kube-node'][0] }}:23457 check inter 5s fall 2 rise 2 weight 1
-        server {{ groups['kube-node'][1] }} {{ groups['kube-node'][1] }}:23457 check inter 5s fall 2 rise 2 weight 1
-        server {{ groups['kube-node'][2] }} {{ groups['kube-node'][2] }}:23457 check inter 5s fall 2 rise 2 weight 1
+{% if groups['kube_node']|length > 3 %}
+        server {{ groups['kube_node'][0] }} {{ groups['kube_node'][0] }}:23457 check inter 5s fall 2 rise 2 weight 1
+        server {{ groups['kube_node'][1] }} {{ groups['kube_node'][1] }}:23457 check inter 5s fall 2 rise 2 weight 1
+        server {{ groups['kube_node'][2] }} {{ groups['kube_node'][2] }}:23457 check inter 5s fall 2 rise 2 weight 1
 {% else %}
-{% for host in groups['kube-node'] %}
+{% for host in groups['kube_node'] %}
         server {{ host }} {{ host }}:23457 check inter 5s fall 2 rise 2 weight 1
 {% endfor %}
 {% endif %}
diff --git a/roles/ex-lb/templates/keepalived-backup.conf.j2 b/roles/ex-lb/templates/keepalived-backup.conf.j2
index 3c90e11..738a92a 100644
--- a/roles/ex-lb/templates/keepalived-backup.conf.j2
+++ b/roles/ex-lb/templates/keepalived-backup.conf.j2
@@ -9,12 +9,12 @@ vrrp_script check-haproxy {
     weight -60
 }
 
-vrrp_instance VI-kube-master {
+vrrp_instance VI-kube_master {
     state BACKUP
     priority {{ 119 | random(61, 1) }}
     unicast_src_ip {{ inventory_hostname }}
     unicast_peer {
-{% for h in groups['ex-lb'] %}{% if h != inventory_hostname %}
+{% for h in groups['ex_lb'] %}{% if h != inventory_hostname %}
         {{ h }}
 {% endif %}{% endfor %}
     }
diff --git a/roles/ex-lb/templates/keepalived-master.conf.j2 b/roles/ex-lb/templates/keepalived-master.conf.j2
index c41417f..93b3b03 100644
--- a/roles/ex-lb/templates/keepalived-master.conf.j2
+++ b/roles/ex-lb/templates/keepalived-master.conf.j2
@@ -9,12 +9,12 @@ vrrp_script check-haproxy {
     weight -60
 }
 
-vrrp_instance VI-kube-master {
+vrrp_instance VI-kube_master {
     state MASTER
     priority 120
     unicast_src_ip {{ inventory_hostname }}
     unicast_peer {
-{% for h in groups['ex-lb'] %}{% if h != inventory_hostname %}
+{% for h in groups['ex_lb'] %}{% if h != inventory_hostname %}
         {{ h }}
 {% endif %}{% endfor %}
     }
diff --git a/roles/kube-master/tasks/main.yml b/roles/kube-master/tasks/main.yml
index bad85e3..a55086a 100644
--- a/roles/kube-master/tasks/main.yml
+++ b/roles/kube-master/tasks/main.yml
@@ -1,4 +1,4 @@
-- name: 下载 kube-master 二进制
+- name: 下载 kube_master 二进制
   copy: src={{ base_dir }}/bin/{{ item }} dest={{ bin_dir }}/{{ item }} mode=0755
   with_items:
   - kube-apiserver
diff --git a/roles/kube-master/templates/kubernetes-csr.json.j2 b/roles/kube-master/templates/kubernetes-csr.json.j2
index 45052a6..6aca552 100644
--- a/roles/kube-master/templates/kubernetes-csr.json.j2
+++ b/roles/kube-master/templates/kubernetes-csr.json.j2
@@ -2,10 +2,10 @@
   "CN": "kubernetes",
   "hosts": [
     "127.0.0.1",
-{% if groups['ex-lb']|length > 0 %}
-    "{{ hostvars[groups['ex-lb'][0]]['EX_APISERVER_VIP'] }}",
+{% if groups['ex_lb']|length > 0 %}
+    "{{ hostvars[groups['ex_lb'][0]]['EX_APISERVER_VIP'] }}",
 {% endif %}
-{% for host in groups['kube-master'] %}
+{% for host in groups['kube_master'] %}
     "{{ host }}",
 {% endfor %}
     "{{ CLUSTER_KUBERNETES_SVC_IP }}",
diff --git a/roles/kube-node/tasks/main.yml b/roles/kube-node/tasks/main.yml
index efc8103..437e099 100644
--- a/roles/kube-node/tasks/main.yml
+++ b/roles/kube-node/tasks/main.yml
@@ -1,4 +1,4 @@
-- name: 创建kube-node 相关目录
+- name: 创建kube_node 相关目录
   file: name={{ item }} state=directory
   with_items:
   - /var/lib/kubelet
@@ -18,7 +18,7 @@
 
 # 每个 node 节点运行 haproxy 连接到多个 apiserver
 - import_tasks: node_lb.yml
-  when: "inventory_hostname not in groups['kube-master']"
+  when: "inventory_hostname not in groups['kube_master']"
 
 - name: 替换 kubeconfig 的 apiserver 地址
   lineinfile:
diff --git a/roles/kube-node/tasks/node_lb.yml b/roles/kube-node/tasks/node_lb.yml
index 88bb449..b70a52f 100644
--- a/roles/kube-node/tasks/node_lb.yml
+++ b/roles/kube-node/tasks/node_lb.yml
@@ -1,7 +1,7 @@
-# kube-node 节点成员不能同时是 ex-lb 节点，因为它们都需要安装 haproxy
+# kube_node 节点成员不能同时是 ex_lb 节点，因为它们都需要安装 haproxy
 - name: fail info1
-  fail: msg="an 'kube-node' node CAN NOT be a 'ex-lb' node at the same time"
-  when: "inventory_hostname in groups['ex-lb']"
+  fail: msg="an 'kube_node' node CAN NOT be a 'ex_lb' node at the same time"
+  when: "inventory_hostname in groups['ex_lb']"
   tags: restart_lb
 
 - name: 安装 haproxy
@@ -40,7 +40,7 @@
 # 仅 master 节点数大于1时才启动haproxy
 - name: 开启haproxy服务
   shell: systemctl start haproxy
-  when: "groups['kube-master']|length > 1"
+  when: "groups['kube_master']|length > 1"
   tags: restart_lb
 
 # master 节点从1个增加到2个时候，需要修改如下配置
@@ -56,11 +56,11 @@
     - "/etc/kubernetes/kubelet.kubeconfig"
     - "/etc/kubernetes/kube-proxy.kubeconfig"
   
-  - name: restart kube-node service
+  - name: restart kube_node service
     service: name={{ item }} state=restarted
     with_items:
     - kubelet
     - kube-proxy
     ignore_errors: true
-  when: "MASTER_CHG == 'yes' and groups['kube-master']|length < 3"
+  when: "MASTER_CHG == 'yes' and groups['kube_master']|length < 3"
   tags: restart_lb
diff --git a/roles/kube-node/templates/haproxy.cfg.j2 b/roles/kube-node/templates/haproxy.cfg.j2
index 34b0715..76cb5d5 100644
--- a/roles/kube-node/templates/haproxy.cfg.j2
+++ b/roles/kube-node/templates/haproxy.cfg.j2
@@ -12,13 +12,13 @@ defaults
         timeout client  10m
         timeout server  10m
 
-listen kube-master
+listen kube_master
         bind 127.0.0.1:6443
         mode tcp
         option tcplog
         option dontlognull
         option dontlog-normal
         balance {{ BALANCE_ALG }} 
-{% for host in groups['kube-master'] %}
+{% for host in groups['kube_master'] %}
         server {{ host }} {{ host }}:6443 check inter 10s fall 2 rise 2 weight 1
 {% endfor %}
diff --git a/roles/kube-node/vars/main.yml b/roles/kube-node/vars/main.yml
index 1728703..c8933ac 100644
--- a/roles/kube-node/vars/main.yml
+++ b/roles/kube-node/vars/main.yml
@@ -2,13 +2,13 @@
 CLUSTER_DNS_SVC_IP: "{{ SERVICE_CIDR | ipaddr('net') | ipaddr(2) | ipaddr('address') }}"
 
 # 设置 APISERVER 地址
-KUBE_APISERVER: "{%- if inventory_hostname in groups['kube-master'] -%} \
+KUBE_APISERVER: "{%- if inventory_hostname in groups['kube_master'] -%} \
                      https://{{ inventory_hostname }}:6443 \
                  {%- else -%} \
-                     {%- if groups['kube-master']|length > 1 -%} \
+                     {%- if groups['kube_master']|length > 1 -%} \
                          https://127.0.0.1:6443 \
                      {%- else -%} \
-                         https://{{ groups['kube-master'][0] }}:6443 \
+                         https://{{ groups['kube_master'][0] }}:6443 \
                      {%- endif -%} \
                  {%- endif -%}"
 
diff --git a/roles/kube-router/kube-router.yml b/roles/kube-router/kube-router.yml
index 5d2fae6..1c86b19 100644
--- a/roles/kube-router/kube-router.yml
+++ b/roles/kube-router/kube-router.yml
@@ -1,5 +1,5 @@
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   roles:
   - kube-router
diff --git a/roles/os-harden/os-harden.yml b/roles/os-harden/os-harden.yml
index 796f220..546bcf2 100644
--- a/roles/os-harden/os-harden.yml
+++ b/roles/os-harden/os-harden.yml
@@ -1,9 +1,9 @@
 # [可选]操作系统安全加固 https://github.com/dev-sec/ansible-os-hardening
 - hosts:
-  - kube-master
-  - kube-node
+  - kube_master
+  - kube_node
   - etcd
-  - ex-lb
+  - ex_lb
   - chrony
   vars:
     os_security_users_allow: change_user
diff --git a/roles/prepare/tasks/main.yml b/roles/prepare/tasks/main.yml
index 85ac396..65f0768 100644
--- a/roles/prepare/tasks/main.yml
+++ b/roles/prepare/tasks/main.yml
@@ -49,5 +49,5 @@
       with_items:
       - kube-controller-manager.kubeconfig
       - kube-scheduler.kubeconfig
-      when: "inventory_hostname in groups['kube-master']"
-  when: "inventory_hostname in groups['kube-master'] or inventory_hostname in groups['kube-node']"
+      when: "inventory_hostname in groups['kube_master']"
+  when: "inventory_hostname in groups['kube_master'] or inventory_hostname in groups['kube_node']"