hadoop2集群中关键配置文件的记录

配置HDFS  高可用

1.配置HDFS配置文件

$ vi hdfs-site.xml
#写入
<configuration>
#配置NameService 名字随便起
 <property>
  <name>dfs.nameservices</name>
  <value>raphael</value>
 </property>
# 这里的最后一个名字就是上面的nameService   value是两台NameNode的节点
<property>
  <name>dfs.ha.namenodes.raphael</name>
  <value>node5,node8</value>
</property>
# node5和node8的rpc地址
<property>
  <name>dfs.namenode.rpc-address.raphael.node5</name>
  <value>node5:8020</value>
</property>
<property>
  <name>dfs.namenode.rpc-address.raphael.node8</name>
  <value>node8:8020</value>
</property>
# node5和node8的http地址
<property>
  <name>dfs.namenode.http-address.raphael.node5</name>
  <value>node5:50070</value>
</property>
<property>
  <name>dfs.namenode.http-address.raphael.node8</name>
  <value>node8:50070</value>
</property>
# 3台JournalNode地址，后台跟名字，但后面的名字不能与nameService相同
<property>
  <name>dfs.namenode.shared.edits.dir</name>
 <value>qjournal://node6:8485;node7:8485;node8:8485/raphael5200</value>
</property>
#配置客户端调用接口
<property>
  <name>dfs.client.failover.proxy.provider.raphael</name>
 <value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>
</property>
<property>
  <name>dfs.ha.fencing.methods</name>
  <value>sshfence</value>
</property>
<property>
  <name>dfs.ha.fencing.ssh.private-key-files</name>
  <value>/root/.ssh/id_dsa</value>
</property>
<property>
  <name>dfs.ha.fencing.methods</name>
  <value>sshfence</value>
</property>
<property>
  <name>dfs.ha.fencing.ssh.connect-timeout</name>
  <value>30000</value>
</property>
#配置journalnode目录
<property>
  <name>dfs.journalnode.edits.dir</name>
  <value>/opt/journalnode</value>
</property>
<property>
   <name>dfs.ha.automatic-failover.enabled</name>
   <value>true</value>
 </property>

$ vi core-site.xml
#这里的value就是NameService的名字
   <property>
        <name>fs.defaultFS</name>
        <value>hdfs://raphael</value>
    </property>

    <property>
        <name>hadoop.tmp.dir</name>
        <value>/opt/hadoop</value>
    </property>
#3台zookeeper节点
 <property>
   <name>ha.zookeeper.quorum</name>
   <value>node5:2181,node6:2181,node7:2181</value>
 </property>

使用Yarn来调度HDFS

1.配置yarn-site.xml

$ cd /usr/local/hadoop/
$ vim etc/hadoop/yarn-site.xml
<property>
   <name>yarn.resourcemanager.ha.enabled</name>
   <value>true</value>
 </property>
# 该cluster-id不能与nameService相同
 <property>
   <name>yarn.resourcemanager.cluster-id</name>
   <value>raphael521</value>
 </property>
#指定2台Resource Manager (即Name Node )节点
 <property>
   <name>yarn.resourcemanager.ha.rm-ids</name>
   <value>rm1,rm2</value>
 </property>
 <property>
   <name>yarn.resourcemanager.hostname.rm1</name>
   <value>node5</value>
 </property>
 <property>
   <name>yarn.resourcemanager.hostname.rm2</name>
   <value>node8</value>
 </property>
#指定zookeeper 节点
 <property>
   <name>yarn.resourcemanager.zk-address</name>
   <value>node6:2181,node7:2181,node8:2181</value>
 </property>

  <property>

        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>

 </configuration>

2.配置etc/hadoop/mapred-site.xml

$ vim etc/hadoop/mapred-site.xml
<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
</configuration>