Decommission a data node in HDP

From Ambari :

Manually :
[root@namenode1 conf]# pwd
/etc/hadoop/conf
[root@namenode1 conf]# ll | grep dfs.exclude
-rw-r--r--. 1 hdfs hadoop     1 Jan 12 15:32 dfs.exclude
[root@namenode1 conf]# cat dfs.exclude

[root@namenode1 conf]# vi dfs.exclude
[root@namenode1 conf]# cat dfs.exclude
edgenode.hdp.cn
[root@namenode1 conf]# su - hdfs
Last login: Sun Jan 12 15:33:08 EST 2020
[hdfs@namenode1 ~]$ hdfs dfsadmin -refreshNodes
Refresh nodes successful

[hdfs@namenode1 ~]$