Hadoop集群启动/停止方式

1.各个模块分开启动/停止（配置 ssh 是前提）

（1）整体启动/停止 HDFS

start-dfs.sh/stop-dfs.sh

（2）整体启动/停止 YARN

start-yarn.sh/stop-yarn.sh

2. 各个服务组件逐一启动/停止

（1）分别启动/停止 HDFS 组件

hdfs --daemon start/stop namenode/datanode/secondarynamenode

（2）启动/停止 YARN

yarn --daemon start/stop resourcemanager/nodemanager

2. 编写 Hadoop 集群常用脚本

Hadoop 集群启停脚本（包含 HDFS，Yarn，Historyserver）：

vim /home/yhd/bin/myhadoop.sh

#!/bin/bash
if [ $# -lt 1 ]
then
 echo "No Args Input..."
 exit ;
fi
case $1 in
"start")
 echo " =================== 启动 hadoop 集群 ==================="
 echo " --------------- 启动 hdfs ---------------"
 ssh hadoop102 "/opt/module/hadoop-3.1.3/sbin/start-dfs.sh"
 echo " --------------- 启动 yarn ---------------"  
 ssh hadoop103 "/opt/module/hadoop-3.1.3/sbin/start-yarn.sh"
 echo " --------------- 启动 historyserver ---------------"
 ssh hadoop102 "/opt/module/hadoop-3.1.3/bin/mapred --daemon start 
historyserver"
;;
"stop")
 echo " =================== 关闭 hadoop 集群 ==================="
 echo " --------------- 关闭 historyserver ---------------"
 ssh hadoop102 "/opt/module/hadoop-3.1.3/bin/mapred --daemon stop 
historyserver"
 echo " --------------- 关闭 yarn ---------------"
 ssh hadoop103 "/opt/module/hadoop-3.1.3/sbin/stop-yarn.sh"
 echo " --------------- 关闭 hdfs ---------------"
 ssh hadoop102 "/opt/module/hadoop-3.1.3/sbin/stop-dfs.sh"
;;
*)
 echo "Input Args Error..."
;;
esac

3.查看三台服务器 Java 进程脚本：jpsall

vim /home/yhd/bin/jpsall.sh

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

常用端口号说明