節點的退役和服役
1、配置新節點的core-site.xml和yarn-site.xml,指向名稱節點
core-site.xml
<name>fs.defaultFS</name>
<value>hdfs://s201/</value>
yarn-site.xml
<name>yarn.resourcemanager.hostname</name>
<value>s201</value>
2、配置hdfs-site.xml和yarn-site.xml指定服役/退役文件,一般指向同一個文件
hdfs-site.xml
<name>dfs.hosts</name>
<value>/soft/hadoop/etc/hadoop/include</value>
<name>dfs.hosts.exclude</name>
<value>/soft/hadoop/etc/hadoop/exclude</value>
yarn-site.xml
<name>yarn.resourcemanager.nodes.include-path</name>
<value>/soft/hadoop/etc/hadoop/include</value>
<name>yarn.resourcemanager.nodes.exclude-path</name>
<value>/soft/hadoop/etc/hadoop/exclude</value>
3、創建include/exclude文件,並編輯服役/退役主機列表
4、刷新節點信息
hdfs dfsadmin -refreshNodes
yarn rmadmin -refreshNodes
5、啓動新節點/關閉舊節點
6、可以手動更新slaves文件。