diff --git a/README.md b/README.md
index 83db65e..15105e9 100755
--- a/README.md
+++ b/README.md
@@ -48,6 +48,7 @@ The Dockin platform installer supports the rapid deployment of highly available
 ```
 Modify the configuration file: vi conf/install.properties
 Fill in the parameters according to the format: server_list=(ip1 ip2 ip3)
+Please copy /data/app/dockin-etcd/conf/*.pem to other etcd nodes after the installation of etcd, then restart etcd
 ```
 
 ```
diff --git a/README.zh-CN.md b/README.zh-CN.md
index cf5259e..e2022d5 100755
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -49,6 +49,7 @@ Dockin平台安装器，快速部署高可用kubernetes集群、ETCD集群，生
 ```
 修改配置文件 vi conf/install.properties
 按格式填写参数：server_list=(ip1 ip2 ip3)
+安装完成后，请将 /data/app/dockin-etcd/conf/*.pem 拷贝到其他etcd节点，再重启etcd
 ```
 
 ```
diff --git a/dockin-etcd/install.sh b/dockin-etcd/install.sh
index e43c22b..6d97bac 100755
--- a/dockin-etcd/install.sh
+++ b/dockin-etcd/install.sh
@@ -47,12 +47,10 @@ while true ; do
         esac
 done
 
-#安装数据文件主目录
 CONTENT_PATH="$SCRIPT_PATH/$(head -n1 .name)"
 CONTENT_NAME=$(head -n1 .name)
 [ -d "$CONTENT_PATH" ] || { log CRITICAL "$CONTENT_PATH/ does NOT exist or is NOT a directory."; exit 9; }
 
-# 本次安装的是不是备份服务器，备份服务器在安装结束时不会执行start.sh，但是在安装的过程中stop.sh�?定会执行�?次�??
 IS_BACKUP_SERVER=$OPT_BACKUP
 if [ -z "$IS_BACKUP_SERVER" ];then
 	[[ "$M_START_SERVER" == true ]] && IS_BACKUP_SERVER=false
@@ -61,13 +59,12 @@ fi
 [ -z "$IS_BACKUP_SERVER" ] && IS_BACKUP_SERVER=false
 [[ "$IS_BACKUP_SERVER" != false && "$IS_BACKUP_SERVER" != true ]] && { log ERRROR "value is invalid [$IS_BACKUP_SERVER]."; exit 33; }
 
-# decide install settings(command line options > M_* env variables > install.conf ).
-# 安装目标目录
+
 DEPLOY_PATH=${OPT_PATH}
 [ -z "$DEPLOY_PATH" ] && DEPLOY_PATH="/data/app/$CONTENT_NAME"
 APP_NAME=$(basename "$DEPLOY_PATH")
 DATA_PATH="/data/$APP_NAME/data"
-#如果指定data目录，则替换data目录
+
 if [ ! "$OPT_DATA_PATH" = "" ]; then
     DATA_PATH=$OPT_DATA_PATH
 fi
@@ -82,7 +79,6 @@ CONFIGS=$OPT_CONF
 [ -z "$CONFIGS" ] && CONFIGS=$M_CONF_NAME
 [ -z "$CONFIGS" ] && CONFIGS=$CONF_NAME
 
-# 根据配置修改安装配置目录
 if [ -z "$CONFIGS" ]; then
 	log INFO "CONFIGS=[$CONFIGS], using default configuration."
 else
@@ -101,7 +97,6 @@ if [ -n "$CONFIGS" ]; then
 	done
 fi
 
-# 初始化日志目录和服务器目录
 if [ ! -e "$LOG_PATH" ]; then
     log INFO "create log path: $APP_NAME."
     mkdir -vp "$LOG_PATH"
@@ -119,7 +114,6 @@ fi
 
 BWLIMIT=1000
 
-#更新服务器配置目录
 if [[ "$OPT_UPDATE_CONFIG" ]]; then
     log INFO "update config ..."
     cd ${SCRIPT_PATH}
@@ -139,16 +133,21 @@ if [[ "$OPT_UPDATE_CONFIG" ]]; then
     exit 0;
 fi
 
-# 关闭服务
+# stop etcd
 if [[ true != "$OPT_UPDATE_CONFIG_ONLY" && -r $DEPLOY_PATH/bin/stop.sh ]]; then
     log WARN "old installation found, try to stop old process, if it exists."
     cd $DEPLOY_PATH/bin
 	sh stop.sh
 fi
 
-# 安装服务
+# install etcd
 cd ${SCRIPT_PATH}
-rsync -cir --delete --bwlimit=$BWLIMIT "$CONTENT_PATH/" "$DEPLOY_PATH/" --exclude=/logs --exclude=/data  --exclude=/tmp --exclude=tomcat --exclude="/.*";
+if [ -f "$DEPLOY_PATH/conf/client-key.pem" ]; then
+    log WARN "certification already exist"
+    rsync -cir --delete --bwlimit=$BWLIMIT "$CONTENT_PATH/" "$DEPLOY_PATH/" --exclude=/logs --exclude=/data --exclude=/conf/*.pem --exclude=/tmp  --exclude="/.*";
+else
+    rsync -cir --delete --bwlimit=$BWLIMIT "$CONTENT_PATH/" "$DEPLOY_PATH/" --exclude=/logs --exclude=/data  --exclude=/tmp  --exclude="/.*";
+fi
 
 if [ ! -d "$DEPLOY_PATH/logs" ]; then
     ln -sf "$LOG_PATH" "$DEPLOY_PATH/logs"
@@ -162,7 +161,6 @@ fi
 
 chmod 775 ${DEPLOY_PATH}/bin/*
 
-#将二进制文件写到环境变量中
 BIN_PATH=$DEPLOY_PATH/bin
 if [[ $(cat ~/.bashrc | grep "alias" | grep "etcdctl=$BIN_PATH/etcdctl" ) == "" ]]; then
     echo 'export ETCDCTL_API=3' >> ~/.bashrc
@@ -173,7 +171,7 @@ fi
 
 [[ -d "$DEPLOY_PATH/scripts" ]] && chmod -R +x ${DEPLOY_PATH}/scripts/ || true
 
-#启动服务
+# start etcd
 if [[ "$IS_BACKUP_SERVER" == false ]]; then
 	log INFO "starting server..."
 	cd $DEPLOY_PATH/bin