1.NN重复初始化后使用的clean.sh

#!/bin/bash
for host in hadoop102 hadoop103 hadoop104
do
    #删除内容
    ssh $host rm -rf $HADOOP_HOME/data $HADOOP_HOME/logs
    ssh $host sudo rm -rf /tmp/* 
done

2.查看所有节点的java进程jpsall.sh

#!/bin/bash
for host in hadoop102 hadoop103 hadoop104
do
    echo "=========================$host============================"
    ssh $host jps
done

3.集群启动，停止mycluster.sh

#!/bin/bash

if [ $# -ne 1 ]
    then    
        echo "args number error!!!"
        exit
fi

case $1 in
"start")
    ssh hadoop102 $HADOOP_HOME/sbin/start-dfs.sh
    ssh hadoop103 $HADOOP_HOME/sbin/start-yarn.sh
    ;;
"stop")
    ssh hadoop102 $HADOOP_HOME/sbin/stop-dfs.sh
    ssh hadoop103 $HADOOP_HOME/sbin/stop-yarn.sh
    ;;
*)
    echo "args info error!!!"
    ;;
esac

可考虑添加历史服务器的启动：
echo “ ———————- 启动 historyserver ———————-“
ssh hadoop102 “/opt/module/hadoop-3.1.3/bin/mapred —daemon start historyserver”
;;

echo “ ———————- 关闭 historyserver ———————-“
ssh hadoop102 “/opt/module/hadoop-3.1.3/bin/mapred —daemon stop historyserver”

4.集群分发脚本xsync

#!/bin/bash
#1. 判断参数个数
if [ $# -lt 1 ]
then
  echo Not Enough Arguement!
  exit;
fi
#2. 遍历集群所有机器
for host in hadoop102 hadoop103 hadoop104
do
  echo ====================  $host  ====================
  #3. 遍历所有目录，挨个发送
  for file in $@
  do
    #4 判断文件是否存在
    if [ -e $file ]
    then
      #5. 获取父目录
      pdir=$(cd -P $(dirname $file); pwd)
      #6. 获取当前文件的名称
      fname=$(basename $file)
      ssh $host "mkdir -p $pdir"
      rsync -av $pdir/$fname $host:$pdir
    else
      echo $file does not exists!
    fi
  done
done

for((host=103; host<105; host++)); do
echo —————————- hadoop$host ———————
rsync -rvl $pdir/$fname $user@hadoop$host:$pdir
done

另一种脚本编写思路，用循环的方式依次登录每个节点。

5.zookeeper群起脚本

#!/bin/bash

if [ $# -ne 1 ]
    then
        echo "args number error!!!"
        exit
fi

var=""

case $1 in
"start")
    var="start"
    ;;
"stop")
    var="stop"
    ;;
"status")
    var="status"
    ;;
*)
    echo "args info error!!!"
    exit
    ;;
esac


for host in hadoop102 hadoop103 hadoop104
do
    echo "==========================$host======================"
    ssh $host /opt/module/zookeeper-3.5.7/bin/zkServer.sh $var
done