五个节点：配置文件解析：
hadoop01 NameNode 、DataNode、NodeManager
hadoop02 ResourceManager
hadoop03 DataNode NodeManager、SecondaryNameNode
hadoop04 DataNode NodeManager
hadoop05 DataNode NodeManager
配置文件；
namenode:(core-site.xml，这里配哪一台，哪一台启动namenode)hadoop01
ResourceManager(yarn-site.xml，这里配哪一台，哪一台启动ResourceManager)hadoop02
DataNode、NodeManager决定于：slaves文件 01,03,04,05
NameNode：
core-site.xml配置hadoop01，hdfs-site.xml下dfs.http.address的value值配置hadoop01
ResourceManager：
yarn-site.xml下value值配置hadoop02
SecondaryNameNode:
hdfs-site.xml下dfs.secondary.http.address的value值配置hadoop03
并创建master文件，里面写上hadoop03
DataNode、NodeManager：
slaves文件中写：hadoop01，hadoop03 ,hadoop04 ,hadoop05
免密发送：
在hadoop01,下，发送到hadoop01，hadoop03 ,hadoop04 ,hadoop05(注：namenode启动datanode)
在hadoop01,下，发送到hadoop01，hadoop03 ,hadoop04 ,hadoop05(注：resourcemanager 启动datamanager)