将hadoop-0.21.0.tar.gz通过SSH Secure File Transfer Client上传到usr目录下
1、修改/usr/hadoop-0.21.0/conf/目录下的master文件,内容如下:
192.168.1.616、修改/usr/hadoop-0.21.0/conf/目录下的slaves文件,内容如下:
192.168.1.62192.168.1.637、修改/usr/hadoop-0.21.0/conf/hadoop-env.sh文件的环境变量:
# The java implementation to use. Required. export JAVA_HOME=/usr/java/jdk1.6.0_208、修改/usr/hadoop-0.21.0/conf/core-site.xml配置文件,内容如下:
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>hadoop.tmp.dir</name> <value>/hadoopdata</value> <description>A base for other temporary directories.</description> </property> <property> <name>fs.default.name</name> <value>hdfs://radhat1:9000</value> <description>The name of the default file system. A URI whose scheme and authority determine the FileSystem implementation. The uri's scheme determines the config property (fs.SCHEME.impl) naming the FileSystem implementation class. The uri's authority is used to determine the host, port, etc. for a filesystem.</description> </property> <property> <name>dfs.hosts.exclude</name> <value>excludes</value> </property> </configuration>9、修改/usr/hadoop-0.21.0/conf/hdfs-site.xml配置文件,内容如下:
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --><configuration> <property> <name>dfs.replication</name> <value>1</value> </property> </configuration>10、修改/jz/hadoop-0.21.0/conf/mapred-site.xml配置文件,内容如下:
<?xml version="1.0"?> <?xml-stylesheet type="text/xsl" href="configuration.xsl"?> <!-- Put site-specific property overrides in this file. --> <configuration> <property> <name>mapred.job.tracker</name> <value>m131:9001</value> <description>The host and port that the MapReduce job tracker runs at. If "local", then jobs are run in-process as a single map and reduce task. </description> </property> </configuration>11、修改ect/hosts配置文件,内容如下:
# Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost 192.168.1.61 redhat1 192.168.1.62 redhat2 192.168.1.63 redhat312、修改/ect/profile配置文件,在末尾追加以下内容,并输入source/etc/profile使之生效:
export JAVA_HOME=/usr/java/jdk1.6.0_20 export JRE_HOME=/usr/java/jdk1.6.0_20/jre export CLASSPATH=.:$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH export PATH=$JAVA_HOME/bin:$PATH export HADOOP_HOME=/usr/hadoop-0.21.0export PATH=$HADOOP_HOME/bin:$PATH export PATH=$PATH:$HIVE_HOME/bin13、将/usr/hadoop-0.21.0拷贝到192.168.1.62和192.168.1.63对应的目录下。将/ect/profile和/etc/hosts也拷贝到62和63机器上。注意profile需要做生效操作。
三、启动/停止hadoop
1、通过shell脚本启动hadoop。sh /usr/hadoop-0.21.0/bin/start-all.sh2、停止hadoop
sh /usr/hadoop-0.21.0/bin/stop-all.sh或者hdfs namenode -formatstart-dfs.shstart-mapred.sh
四、初始配置
1、格式化HDFS文件系统。进入/usr/hadoop-0.21.0/bin目录。执行:
hadoop namenode –format2、在/jz/hadoop-0.21.0/bin目录下,执行:
hadoop fs -ls /
如果控制台返回结果,表示初始化成功。可以向里面录入数据。
3、通过WEB查看hadoop
查看集群状态 http://192.168.1.61:50070/dfshealth.jsp 查看JOB状态 http://192.168.1.61:50030/jobtracker.jsp
五、注意事项
1、hadoop的安装千万计的修改/etc/hosts文件。修改之后最好是重启机器。
2、master和slaves这2个配置文件可以不拷贝到redhat2和redhat3机器上,只在master上保存即可。
3、通过web查看hadoop的时候,如果使用IE一些图形工具显示不出来,建议使用opera或是chrome。