# 退休手冊 * 新增一台DataNode ``` kubectl apply –f wka04.yml ``` * 確認新增 Data Node 是否加入 HDFS ``` hdfs dfsadmin –refreshNodes ``` > 顯示Refresh nodes successful ``` hdfs dfsadmin -printTopology ``` ![](https://i.imgur.com/eEpp9BD.png) * 設定 Data Node 1. 編輯白名單 ``` nano /opt/hadoop-2.10.1/etc/hadoop/hdfs.allow ``` 2. 編輯除役名單 ``` nano /opt/hadoop-2.10.1/etc/hadoop/hdfs.decommission ``` 3. 設定白名單、除役名單路徑 ``` nano /opt/hadoop-2.10.1/etc/hadoop/hdfs-site.xml ``` * 重新啟動HDFS ``` stophdfs; starthdfs ``` * 檢視 HDFS 運作資訊 ``` hdfs dfsadmin -report ``` ![](https://i.imgur.com/B47fmNB.png)