hadoo集群启动，shell脚本！！
#!/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/ha/hadoop-3.1.3/sbin/start-dfs.sh"
echo " --------------- 启动 yarn ---------------"
ssh hadoop103 "/opt/ha/hadoop-3.1.3/sbin/start-yarn.sh"
;;
"stop")
echo " =================== 关闭 hadoop集群 ==================="
echo " --------------- 关闭 yarn ---------------"
ssh hadoop103 "/opt/ha/hadoop-3.1.3/sbin/stop-yarn.sh"
echo " --------------- 关闭 hdfs ---------------"
ssh hadoop102 "/opt/ha/hadoop-3.1.3/sbin/stop-dfs.sh"
;;
*)
echo "Input Args Error..."
;;
esac