1 #!/bin/bash
 2 case $1 in
 3 "start")
 4 echo "————————————启动 hadoop 集群————————"
 5 ssh hadoop106 "/opt/module/hadoop/sbin/start-dfs.sh"
 6 ssh hadoop107 "/opt/module/hadoop/sbin/start-yarn.sh"
 7 ;;
 8 "stop")
 9 echo "—————————关闭 Hadoop 集群———————————"
10 ssh hadoop106 "/opt/module/hadoop/sbin/stop-dfs.sh"
11 ssh hadoop107 "/opt/module/hadoop/sbin/stop-yarn.sh"
12 ;;
13 esac

在 /opt/module/hadoop/etc/hadoop/hadoop-env.sh 里添加

export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root