hadoop 分布式集群启动命令 停止命令 hadoop jps查看每个节点状态命令

#!/bin/bash

# 判断参数个数
if [ $# -lt 1 ]
then
    echo "使用方法: ./myhadoop.sh {start|stop}"
    exit
fi

case $1 in
"start")
    echo "=================== 启动 Hadoop 集群 ==================="
    
    echo "--------------- 启动 HDFS ---------------"
    # 请将 hadoop102 替换为你的 NameNode 所在的主机名
    ssh hadoop01 "$HADOOP_HOME/sbin/start-dfs.sh"
    
    echo "--------------- 启动 YARN ---------------"
    # 请将 hadoop103 替换为你的 ResourceManager 所在的主机名
    ssh hadoop02 "$HADOOP_HOME/sbin/start-yarn.sh"
    
    echo "--------------- 启动 HistoryServer ---------------"
    ssh hadoop03 "$HADOOP_HOME/bin/mapred --daemon start historyserver"
    ;;
    
"stop")
    echo "=================== 停止 Hadoop 集群 ==================="
    
    echo "--------------- 停止 HistoryServer ---------------"
    ssh hadoop03 "$HADOOP_HOME/bin/mapred --daemon stop historyserver"
    
    echo "--------------- 停止 YARN ---------------"
    ssh hadoop02 "$HADOOP_HOME/sbin/stop-yarn.sh"
    
    echo "--------------- 停止 HDFS ---------------"
    ssh hadoop01 "$HADOOP_HOME/sbin/stop-dfs.sh"
    ;;
    
*)
    echo "输入参数错误！"
    echo "使用方法: ./myhadoop.sh {start|stop}"
    ;;
esac

　　jpsall.sh查看每个节点状态

#!/bin/bash
for host in hadoop01 hadoop02 hadoop03  # 请替换为你的实际主机名
do
    echo "=============== $host ==============="
    ssh $host 'jps -ml'  # 或者使用jps的完整路径，例如 /opt/module/jdk1.8.0_144/bin/jps
done
echo "======================执行完毕===================="