my Hadooop 集群启动脚本，

my Hadooop 集群启动脚本，

1. 创建 myhadoop脚本文件

touch myhadoop

2. 编写脚本

#!/bin/bash

if [ $# -lt 1 ]
then
    echo "No Args Input...[start,stop]"
    exit ;
fi
hadoop_home=/opt/hadoop/hadoop-3.3.3
case $1 in
"start")
        echo " =================== 启动 hadoop集群 ==================="

        echo " --------------- 启动 hdfs ---------------"
        ssh test01 "$hadoop_home/sbin/start-dfs.sh"
        echo " --------------- 启动 yarn ---------------"
        ssh test02 "$hadoop_home/sbin/start-yarn.sh"
        echo " --------------- 启动 historyserver ---------------"
        ssh test01 "$hadoop_home/bin/mapred --daemon start historyserver"
;;
"stop")
        echo " =================== 关闭 hadoop集群 ==================="

        echo " --------------- 关闭 historyserver ---------------"
        ssh test01 "$hadoop_home/bin/mapred --daemon stop historyserver"
        echo " --------------- 关闭 yarn ---------------"
        ssh test02 "$hadoop_home/sbin/stop-yarn.sh"
        echo " --------------- 关闭 hdfs ---------------"
        ssh test01 "$hadoop_home/sbin/stop-dfs.sh"
;;
*)
    echo "Input Args Error...[start,stop]"
;;
esac

3. 给脚本赋予权限

chmod 777 myhadoop