hadoop2.2集群

1、ls -l
查看文件所有者，以及权限

2、网络配置、hosts配置(hostname配置)、ssh免密配置、环境变量配置、关闭防火墙

3、文件配置
配置文件1：hadoop-env.sh

配置文件2：yarn-env.sh

配置文件3：slaves
sniper2
sniper3

配置文件4：core-site.xml
<configuration>
       <property>
                <name>fs.defaultFS</name>
                <value>hdfs://sniper1:9000</value>
       </property>
       <property>
                <name>io.file.buffer.size</name>
                <value>131072</value>
        </property>
       <property>
               <name>hadoop.tmp.dir</name>
               <value>/home/grid/soft/java/hadoop/hadoop/tmp</value>
       </property>
        <property>
               <name>hadoop.proxyuser.grid.hosts</name>
               <value>*</value>
       </property>
       <property>
               <name>hadoop.proxyuser.grid.groups</name>
               <value>*</value>
       </property>
</configuration>

配置文件5：hdfs-site.xml
<configuration>
       <property>
               <name>dfs.namenode.secondary.http-address</name>
               <value>sniper1:9001</value>
       </property>
        <property>
                <name>dfs.namenode.name.dir</name>
               <value>/home/grid/soft/java/hadoop/hadoop/dfs/name</value>
       </property>
       <property>
               <name>dfs.datanode.data.dir</name>
               <value>/home/grid/soft/java/hadoop/hadoop/dfs/data</value>
       </property>
       <property>
               <name>dfs.replication</name>
               <value>2</value>
       </property>
       <property>
               <name>dfs.webhdfs.enabled</name>
               <value>true</value>
       </property>
</configuration>


配置文件6：mapred-site.xml
<configuration>
      <property>                                                                  
               <name>mapreduce.framework.name</name>
               <value>yarn</value>
      </property>
      <property>
               <name>mapreduce.jobhistory.address</name>
               <value>sniper1:10020</value>
      </property>
      <property>
               <name>mapreduce.jobhistory.webapp.address</name>
               <value>sniper1:19888</value>
      </property>
</configuration>

配置文件7：yarn-site.xml
<configuration>
      <property>
               <name>yarn.nodemanager.aux-services</name>
               <value>mapreduce_shuffle</value>
      </property>
      <property>                                                                
               <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
               <value>org.apache.hadoop.mapred.ShuffleHandler</value>
      </property>
      <property>
               <name>yarn.resourcemanager.address</name>
               <value>sniper1:8032</value>
      </property>
      <property>
               <name>yarn.resourcemanager.scheduler.address</name>
               <value>sniper1:8030</value>
      </property>
      <property>
            <name>yarn.resourcemanager.resource-tracker.address</name>
            <value>sniper1:8031</value>
      </property>
      <property>
              <name>yarn.resourcemanager.admin.address</name>
              <value>sniper1:8033</value>
      </property>
      <property>
              <name>yarn.resourcemanager.webapp.address</name>
              <value>sniper1:8088</value>
      </property>
</configuration>

格式化：hdfs namenode -format

启动hdfs：start-dfs.sh

查看hdfs状态：hdfs dfsadmin -safemode get

启动yarn：start-yarn.sh

hadoop jar helloworld.jar cn.sniper.hadoop.HelloWorld