查看服务器进程
查看java 进程脚本:jpsall
[hadoop@hadoop102 ~]$ cd /home/hadoop/bin
[hadoop@hadoop102 ~]$ vim jpsall
然后输入
#!/bin/bash
for host in hadoop102 hadoop103 hadoop104
do
echo =============== $host ===============
ssh $host jps $@ | grep -v Jps
done
保存后退出,然后赋予脚本执行权限
[hadoop@hadoop102 bin]$ chmod +x jpsall
hadoop 集群启停脚本
(包含 hdfs,yarn,historyserver):myhadoop.sh
[hadoop@hadoop102 ~]$ cd /home/hadoop/bin
[hadoop@hadoop102 ~]$ vim myhadoop.sh
然后输入
#!/bin/bash
if [ $# -lt 1 ]
then
echo "No Args Input..."
exit ;
fi
case $1 in
"start")
echo " =================== 启动 hadoop 集群 ==================="
echo " --------------- 启动 hdfs ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/sbin/start-dfs.sh"
echo " --------------- 启动 yarn ---------------"
ssh hadoop103 "/opt/module/hadoop-3.1.3/sbin/start-yarn.sh"
echo " --------------- 启动 historyserver ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/bin/mapred --daemon start
historyserver"
;;
"stop")
echo " =================== 关闭 hadoop 集群 ==================="
echo " --------------- 关闭 historyserver ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/bin/mapred --daemon stop
historyserver"
echo " --------------- 关闭 yarn ---------------"
ssh hadoop103 "/opt/module/hadoop-3.1.3/sbin/stop-yarn.sh"
echo " --------------- 关闭 hdfs ---------------"
ssh hadoop102 "/opt/module/hadoop-3.1.3/sbin/stop-dfs.sh"
;;
*)
echo "Input Args Error..."
;;
esac
保存后退出,然后赋予脚本执行权限
[hadoop@hadoop102 bin]$ chmod +x myhadoop.sh
分发/home/atguigu/bin 目录,保证自定义脚本在三台机器上都可以使用
[hadoop@hadoop102 ~]$ xsync /home/hadoop/bin/