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Hadoop 2.2.0安装及配置

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Pre-installation

保证所有主机上已经安装 JDK 1.6+和 ssh。

添加主机名到/etc/hosts

修改/etc/hosts

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sudo vi /etc/hosts

添加

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192.168.56.101 zhenlong-master
192.168.56.102 zhenlong-slave1

配置无密码的 ssh 连接

在所有主机上生成 ssh 的公钥和私钥

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ssh-keygen -t rsa

在 master 主机上，生成 authorized_keys

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cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys
chmod 644 ~/.ssh/authorized_keys

，并 copy 到所有 slaves 的~/.ssh/目录。

Installation

Download Apache Hadoop

Apache Hadoop: http://www.apache.org/dyn/closer.cgi/hadoop/common/

保证 master 和 slaves 上面的 hadoop 解压的相同的目录

Set Environment Variables

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export HADOOP_HOME=/home/hadoop/hadoop-2.2.0
export JAVA_HOME=/home/hadoop/jdk1.6.0_45

Hadoop Configuration

修改 conf 文件夹下面的几个文件：

  • core-site.xml
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<configuration>
	<property>
		<name>fs.default.name</name>
		<value>hdfs://zhenlong-master:9000</value>
	</property>
	<property>
		<name>hadoop.tmp.dir</name>
		<value>/home/hadoop/hadoop_tmp/hadoop2</value>
	</property>
</configuration>
  • hdfs-site.xml
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<configuration>
	<property>
		<name>dfs.namenode.name.dir</name>
		<value>/home/hadoop/hadoop_dfs/hadoop2/name</value>
		<description>Path on the local filesystem where the NameNode stores the namespace and transactions logs persistently.</description>
	</property>
	<property>
		<name>dfs.datanode.data.dir</name>
		<value>/home/hadoop/hadoop_dfs/hadoop2/data</value>
		<description>Comma separated list of paths on the local filesystem of a DataNode where it should store its blocks.</description>
	</property>
	<property>
		<name>dfs.permissions</name>
		<value>false</value>
	</property>
</configuration>
  • mapred-site.xml
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<configuration>
	<property>
		<name>mapreduce.framework.name</name>
		<value>yarn</value>
	</property>
</configuration>
  • yarn-site.xml
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<configuration>
	<property>
		<name>yarn.resourcemanager.resource-tracker.address</name>
		<value>zhenlong-master:8031</value>
		<description>host is the hostname of the resource manager and    port is the port on which the NodeManagers contact the Resource Manager.          </description>
	</property>
	<property>
		<name>yarn.resourcemanager.scheduler.address</name>
		<value>zhenlong-master:8030</value>
		<description>host is the hostname of the resourcemanager and port is the port    on which the Applications in the cluster talk to the Resource Manager.          </description>
	</property>
	<property>
		<name>yarn.resourcemanager.scheduler.class</name>
		<value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler</value>
		<description>In case you do not want to use the default scheduler</description>
	</property>
	<property>
		<name>yarn.resourcemanager.address</name>
		<value>zhenlong-master:8032</value>
		<description>the host is the hostname of the ResourceManager and the port is the port on    which the clients can talk to the Resource Manager. </description>
	</property>
	<property>
		<name>yarn.nodemanager.local-dirs</name>
		<value>${hadoop.tmp.dir}/nodemanager/local</value>
		<description>the local directories used by the nodemanager</description>
	</property>
	<property>
		<name>yarn.nodemanager.address</name>
		<value>0.0.0.0:8034</value>
		<description>the nodemanagers bind to this port</description>
	</property>
	<property>
		<name>yarn.nodemanager.remote-app-log-dir</name>
		<value>${hadoop.tmp.dir}/nodemanager/remote</value>
		<description>directory on hdfs where the application logs are moved to </description>
	</property>
	<property>
		<name>yarn.nodemanager.log-dirs</name>
		<value>${hadoop.tmp.dir}/nodemanager/logs</value>
		<description>the directories used by Nodemanagers as log directories</description>
	</property>
	<!-- Use mapreduce_shuffle instead of mapreduce.suffle (YARN-1229)-->
	<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>
</configuration>
  • slaves
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zhenlong-slave1
  • hadoop-env.sh
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export JAVA_HOME=/home/hadoop/jdk1.6.0_45

此处 JAVA_HOME 可以根据每天 Server 情况设定。

格式化 NameNode

第一次启动，需要先格式化 NameNode。

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hadoop namenode -format

Start Hadoop

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~/hadoop-2.2.0/sbin/start-all.sh

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  • In master

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  • In slaves

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 Test

  • HDFS Web UI: http://zhenlong-master:50070

  • YARN Web UI: http://zhenlong-master:8088

  • YARN && MapReduce 测试：

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~/hadoop-2.2.0/bin/hadoop jar ~/hadoop-2.2.0/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.2.0.jar wordcount file wordcount_out

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