hadoop 2.3.0 配置 Single Node Cluster

下载

文档地址[url]http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/SingleCluster.html[/url]

[url]http://www.diaryfolio.com/hadoop-install-steps/[/url]


[size=large][b]前期准备[/b][/size]

解压到指定目录

tar -zxvf hadoop-2.3.0.tar.gz -C /data/javadev

添加hadoop用户和用户组

useradd hadoop
usermod -g hadoop hadoop

查看hadoop用户

id hadoop

将解压的hadoop文件目录所属用户改为hadoop

chown -R hadoop:hadoop hadoop-2.3.0/

将hadoop添加到sudo中

visudo

在末尾添加一行

hadoop          ALL=(ALL)               ALL

保存

切换到hadoop用户

su - hadoop

[size=large][b]环境变量和SSH配置[/b][/size]

以下操作都使用hadoop用户

修改环境变量

vi .bashrc

export JAVA_HOME=/usr/java/jdk1.6.0_31/

#hadoop var
HADOOP_COMMON_HOME=/data01/javaapp/hadoop-2.3.0
HADOOP_HDFS_HOME=/data01/javaapp/hadoop-2.3.0
HADOOP_MAPRED_HOME=/data01/javaapp/hadoop-2.3.0
HADOOP_YARN_HOME=/data01/javaapp/hadoop-2.3.0
HADOOP_CONF_DIR=/data01/javaapp/hadoop-2.3.0/etc/hadoop
YARN_CONF_DIR=/data01/javaapp/hadoop-2.3.0/etc/hadoop

export HADOOP_COMMON_HOME HADOOP_HDFS_HOME HADOOP_MAPRED_HOME HADOOP_YARN_HOME HADOOP_CONF_DIR  YARN_CONF_DIR

export PATH=$PATH:$HADOOP_COMMON_HOME/bin

保存

使环境变量立即生效

source .bashrc

设置SSH

ssh-keygen -t rsa -P ""   

cat id_dsa.pub >> ~/.ssh/authorized_keys 


chmod 644 authorized_keys
cd ~
chmod 700 .ssh

[size=large][b]
hadoop配置文件[/b][/size]

connect to host localhost port 22: Connection refused

SSH端口不是默认的22端口，修改环境配置文件

 hadoop-2.3.0/etc/hadoop/hadoop-env.sh

追加一行

export HADOOP_SSH_OPTS="-p <num>"

The authenticity of host 'localhost (127.0.0.1)' can't be established.

SSH认证文件权限不正确
切换到su hadoop 到/home/hadoop目录
执行

chmod 644 authorized_keys
cd ~
chmod 700 .ssh

创建 hadoop-2.3.0/tmp目录

mkdir tmp

修改hadoop-2.3.0/etc/hadoop/mapred-site.xml


修改四个配置文件

#hadoop-2.3.0/etc/hadoop/core-site.xml

 <configuration>
 <property>
 <name>hadoop.tmp.dir</name>
 <value>/data01/javaapp/hadoop-2.3.0/tmp</value>
 <description>A base for other temporary directories.</description>
 </property>
 <property>
 <name>fs.default.name</name>
 <value>hdfs://localhost:54310</value>
 </property>
</configuration>

#vi etc/hadoop/mapred-site.xml

<configuration>
<property>
 <name>mapred.job.tracker</name>
 <value>localhost:54311</value>
 </property>
 <property>
 <name> mapreduce.framework.name</name>
 <value>yarn</value>
 </property>
</configuration>

#vi etc/hadoop/hdfs-site.xml

<configuration>
 <property>
 <name>dfs.replication</name>
 <value>1</value>
 </property>
 <property>
 <name>dfs.permissions</name>
 <value>false</value>
 </property>
</configuration>

#vi 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>
</configuration>

[size=large][b]hadoop启动和停止[/b][/size]

格式化HDFS文件系统

$HADOOP_HOME/bin/hadoop namenode -format  

启动系统

$HADOOP_HOME/sbin/hadoop-daemon.sh start namenode
$HADOOP_HOME/sbin/hadoop-daemon.sh start datanode
$HADOOP_HOME/sbin/hadoop-daemon.sh start secondarynamenode

$HADOOP_HOME/sbin/yarn-daemon.sh start resourcemanager
$HADOOP_HOME/sbin/yarn-daemon.sh start nodemanager
$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver

查看运行日志：
[quote] less logs/hadoop-hadoop-datanode-UAT.log[/quote]


停止系统

$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh stop historyserver
$HADOOP_HOME/sbin/yarn-daemon.sh stop nodemanager
$HADOOP_HOME/sbin/yarn-daemon.sh stop resourcemanager

$HADOOP_HOME/sbin/hadoop-daemon.sh stop secondarynamenode
$HADOOP_HOME/sbin/hadoop-daemon.sh stop datanode
$HADOOP_HOME/sbin/hadoop-daemon.sh stop namenode

查看Java虚拟机里运行的hadoop进程

# Java Virtual Machine Process Status Tool (jps) acts like a ps command and 
# shows various java process running. Hence running would show all hadoop processes.
hduser@diaryfoliovm:/opt/hadoop$ jps
2243 TaskTracker
2314 JobTracker
1923 DataNode
2895 SecondaryNameNode
1234 Jps
1788 NameNode

[size=large][b]运行wordcount实例[/b][/size]

创建空文件

vi hadoop-2.3.0/tmp/input 

复制以下内容进去

Read: Father of Santa Barbara Victim Sobs and Rails Against Son's Death
That "last chance" turned bleak – a night that reflected his ambitions,
 fury and warped perspectives. It became a flashpoint leading up to last 
 Friday's attacks that left six others dead and 13 injured.
WATCH: Massive Crowd Comes to Mourn Santa Barbara Shooting Victims
Rodger bought a bottle of vodka that night, taking a few shots for 
courage, maybe downing one too many. Other students were partying – 
"good looking popular kids," as he identified them. Without the buzz, 
he would have been too intimidated to mingle.

启动hadoop，

$HADOOP_HOME/sbin/hadoop-daemon.sh start namenode
$HADOOP_HOME/sbin/hadoop-daemon.sh start datanode
$HADOOP_HOME/sbin/hadoop-daemon.sh start secondarynamenode

$HADOOP_HOME/sbin/yarn-daemon.sh start resourcemanager
$HADOOP_HOME/sbin/yarn-daemon.sh start nodemanager
$HADOOP_HOME/sbin/mr-jobhistory-daemon.sh start historyserver

执行wordcount命令

 bin/hadoop jar share/hadoop/mapreduce/hadoop-mapreduce-examples-2.3.0.jar wordcount file:///data01/javaapp/hadoop-2.3.0/tmp/input output2

查看生成的文件

 bin/hadoop fs  -ls -R output2

 14/05/28 14:06:39 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
-rw-r--r--   1 hadoop supergroup          0 2014-05-28 13:58 output2/_SUCCESS
-rw-r--r--   1 hadoop supergroup       4574 2014-05-28 13:58 output2/part-r-00000

查看统计结果

bin/hadoop fs -cat output2/part-r-00000

删除已生成的结果文件

bin/hadoop fs -rmr output*

运行状态：

 bin/hadoop dfsadmin -report

webl界面
[url]http://192.168.1.22:50075/dataNodeHome.jsp[/url]

hfs文件管理
[url]http://192.168.1.22:50070/dfshealth.html[/url]

[url]http://192.168.1.22:50090/status.jsp[/url]

节点管理
[url]http://192.168.1.22:8042/node[/url]

应用管理
[url]http://192.168.1.22/node:8088[/url]

hadoop缺省端口
http://hsrong.iteye.com/blog/1374734

[url="http://powertech.iteye.com/admin/blogs/2082204"]hadoop2.3集群[/url]