1. 三台机器： hadoop22, hadoop23, hadoop24

2. hdfs在22机器启动，yarn在hadoop23机器

3. 脚本需要hadoop用户启动才可以

4. 脚本：

#!/bin/bash
 
HADOOP_PATH="/opt/module/hadoop-3.3.4"

# 检查脚本执行用户是否为 hadoop
if [ "$(whoami)" != "hadoop" ]; then
    echo "错误: 该脚本需要以 hadoop 用户身份执行"
    exit 1
fi

# 检查输入参数
if [ "$#" -ne 1 ]; then
    echo "使用方法: $0 <start|stop>"
    exit 1
fi
 
function start_cluster() {

		echo "****************************************************************"
		echo "*                                                              *"
		echo "***********************启动hadoop集群.**************************"
		echo "*                                                              *"
		echo "****************************************************************"

		cd $HADOOP_PATH
		sbin/start-dfs.sh
		echo "已启动hdf."
		ssh -T hadoop23 << EOF
		cd "$HADOOP_PATH"
		sbin/start-yarn.sh
		echo "已启动yarn."
		exit
EOF

}
 
function stop_cluster() {

		echo "****************************************************************"
		echo "*                                                              *"
		echo "***********************关闭hadoop集群.**************************"
		echo "*                                                              *"
		echo "****************************************************************"

		cd $HADOOP_PATH
		sbin/stop-dfs.sh
		echo "已关闭hdf."
		ssh -T hadoop23 << EOF
		cd "$HADOOP_PATH"
		sbin/stop-yarn.sh
		echo "已关闭yarn."
		exit
EOF
		
}
 
# 判断输入参数是start还是stop
case "$1" in
	"start")
		start_cluster
		;;
	"stop")
		stop_cluster
		;;
	*)
		echo "未知操作：$1"
		exit 1
		;;
esac