集群批量执行脚本.md

一、创建 xcall.sh 文件

#!/bin/bash

# 获取控制台指令

cmd=$*

# 判断指令是否为空
if [[ "$cmd" = "" ]]
then
        echo "command can not be null !"
        exit
fi

# 获取当前登录用户
user=`whoami`

# 在从机执行指令,这里需要根据你具体的集群情况配置，host与具体主机名一致
for (( host=1;host<=3;host++ ))
do
        echo "================current host is hadoop$host================="
        echo "--> excute command \"$cmd\""
        ssh $user@hadoop$host $cmd
done

echo "excute successfully !"

二、测试

[root@hadoop1 bin]# xcall.sh jps
================current host is hadoop1=================
--> excute command "jps"
12301 Jps
================current host is hadoop2=================
--> excute command "jps"
11856 Jps
================current host is hadoop3=================
--> excute command "jps"
11858 Jps
excute successfully !