本文(亲测实录)主要列出在安装hadoop 2.4.1过程中各个文件配置情况,其他步骤请参考网络其他资源进行操作
1、JDK安装和SSH互信(略过)
2、各节点IP和hostname如下(各节点需配置)
[hadoop@master ~]$ cat /etc/hosts
127.0.0.1 localhost
100.12.56.221 slave-1
100.12.56.222 slave-2
100.12.56.223 slave-3
100.12.56.224 slave-4
100.12.56.227 slave-5
100.12.56.228 master
3、各节点操作使用hadoop用户进行,hadoop安装目录在/home/hadoop/hadoop-2.4.1下
4、JAVA环境变量配置如下
[hadoop@master hadoop-2.4.1]$ cat /etc/profile(各节点需配置)
export JAVA_HOME=/usr/java/jdk1.7.0_51
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=.:$JAVA_HOME/bin:$PATH
export PATH=/home/hadoop/hadoop-2.4.1/bin:/home/hadoop/hadoop-2.4.1/bin:$PATH
#该环境变量的配置,让shell能够查找到hadoop的类路径
5、master创建下这几个目录(这几个目录不知道是否必须创建,本例实验时创建了目录,实验成功)
mkdir -p /home/hadoop/tmp
mkdir -p /home/hadoop/dfs/name
mkdir -p /home/hadoop/dfs/data
6、编辑hadoop-env.sh(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/hadoop-env.sh
#添加如下内容
export JAVA_HOME=/usr/java/jdk1.7.0_51
7、编辑yarn-env.sh(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/yarn-env.sh
#添加如下内容
export JAVA_HOME=/usr/java/jdk1.7.0_51
8、编辑slaves(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/slaves
#添加如下内容
slave-1
slave-2
slave-3
slave-4
slave-5
9、编辑core-site.xml(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/core-site.xml
#添加如下内容
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://master:8020</value>
</property>
<property>
<name>io.file.buffer.size</name>
<value>131072</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>file:/home/hadoop/tmp</value>
<description>Abase for other temporary directories.</description>
</property>
<property>
<name>hadoop.proxyuser.hadoop.hosts</name>
<value>*</value>
</property>
<property>
<name>hadoop.proxyuser.hadoop.groups</name>
<value>*</value>
</property>
</configuration>
10、编辑hdfs-site.xml(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/hdfs-site.xml
<configuration>
<property>
<name>dfs.namenode.secondary.http-address</name>
<value>master:9001</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/home/hadoop/dfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/home/hadoop/dfs/data</value>
</property>
<property>
<name>dfs.replication</name>
<value>3</value>
</property>
<property>
<name>dfs.webhdfs.enabled</name>
<value>true</value>
</property>
</configuration>
11、编辑mapred-site.xml(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/mapred-site.xml
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>master:10020</value>
</property>
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>master:19888</value>
</property>
</configuration>
12、编辑yarn-site.xml(master节点)
vi /home/hadoop/hadoop-2.4.1/etc/hadoop/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>master:8032</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>master:8030</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>master:8031</value>
</property>
<property>
<name>yarn.resourcemanager.admin.address</name>
<value>master:8033</value>
</property>
<property>
<name>yarn.resourcemanager.webapp.address</name>
<value>master:8088</value>
</property>
</configuration>
13、拷贝软件到其他节点(master节点)
scp -r /home/hadoop/hadoop-2.4.1 slave-1:/home/hadoop/
scp -r /home/hadoop/hadoop-2.4.1 slave-2:/home/hadoop/
scp -r /home/hadoop/hadoop-2.4.1 slave-3:/home/hadoop/
scp -r /home/hadoop/hadoop-2.4.1 slave-4:/home/hadoop/
scp -r /home/hadoop/hadoop-2.4.1 slave-5:/home/hadoop/
14、格式化hdfs文件系统(master节点)
hdfs namenode –format
15、启动yarn
/home/hadoop/hadoop-2.4.1/sbin/start-yarn.sh(master节点)
16、jps
master节点:
[hadoop@master sbin]$ jps
8783 NameNode
8981 SecondaryNameNode
9759 Jps
9132 ResourceManager
slave节点:
[hadoop@slave-5 ~]$ jps
6911 DataNode
7035 NodeManager
7281 Jps
17、网页上访问
http://master:8088/
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