hadoop2.7.2修改配置文件，配置linux java环境变量

Posted 2020-08-16

1.修改core-site.xml，加上

<property>

        <name>fs.defaultFS</name>

        <value>hdfs://backup02:9000</value>

    </property>

    <property>

        <name>hadoop.tmp.dir</name>

        <value>file:/home/zhongml/hadoop-2.7.2/tmp</value>

    </property>

    <property>

        <name>io.file.buffer.size</name>

        <value>131702</value>

    </property>

2.修改hdfs-site.xml，加上

<property>

        <name>dfs.namenode.name.dir</name>

        <value>file:/home/zhongml/hadoop-2.7.2/hdfs/name</value>

    </property>

    <property>

        <name>dfs.datanode.data.dir</name>

        <value>file:/home/zhongml/hadoop-2.7.2/hdfs/data</value>

    </property>

    <property>

        <name>dfs.replication</name>

        <value>2</value>

    </property>

    <property>

        <name>dfs.namenode.secondary.http-address</name>

        <value>backup02:9001</value>

    </property>

    <property>

        <name>dfs.webhdfs.enabled</name>

        <value>true</value>

    </property>

3.先复制一个mapred-site.xml

    cp mapred-site.xml.template mapred-site.xml

修改mapred-site.xml，加上

<property>

        <name>mapreduce.framework.name</name>

        <value>yarn</value>

    </property>

    <property>

        <name>mapreduce.jobhistory.address</name>

        <value>backup02:10020</value>

    </property>

    <property>

        <name>mapreduce.jobhistory.webapp.address</name>

        <value>backup02:19888</value>

    </property>

4.修改yarn-site.xml，加上

<property>

        <name>yarn.nodemanager.aux-services</name>

        <value>mapreduce_shuffle</value>

    </property>

    <property>

        <name>yarn.nodemanager.auxservices.mapreduce.shuffle.class</name>

        <value>org.apache.hadoop.mapred.ShuffleHandler</value>

    </property>

    <property>

        <name>yarn.resourcemanager.address</name>

        <value>backup02:8032</value>

    </property>

    <property>

        <name>yarn.resourcemanager.scheduler.address</name>

        <value>backup02:8030</value>

    </property>

    <property>

        <name>yarn.resourcemanager.resource-tracker.address</name>

        <value>backup02:8031</value>

    </property>

    <property>

        <name>yarn.resourcemanager.admin.address</name>

        <value>backup02:8033</value>

    </property>

    <property>

        <name>yarn.resourcemanager.webapp.address</name>

        <value>backup02:8088</value>

    </property>

    <property>

        <name>yarn.nodemanager.resource.memory-mb</name>

        <value>768</value>

    </property>

5.配置/home/zhongml/hadoop-2.7.2/etc/hadoop目录下hadoop-env.sh、yarn-env.sh的JAVA_HOME

6.配置/home/zhongml/hadoop-2.7.2/etc/hadoop目录下slaves

7.验证启动是否成功

bin/hadoop fs -ls

http://localhost:50030(MapReduce的页面)

http://localhost:50070(HDFS的页面)

8.如果是64位的linux，需要覆盖native

9.配置java环境变量/etc/profile

先卸载linux自带的jdk，

执行以下命令查看需要卸载的选项:

rpm -qa | grep gcj

执行卸载操作:

yum -y remove java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

将以下内容添加到/etc/profile末尾

JAVA_HOME=/jdk/jdk1.8.0_101/

PATH=$JAVA_HOME/bin:$PATH

CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export JAVA_HOME

export PATH

export CLASSPATH

注意:装好hadoop环境必须关闭防火墙:

关闭防火墙服务
[[email protected] hadoop]# service iptables stop
关闭开机自动启动

[[email protected] hadoop]# chkconfig iptables off

安装以下软件:

yum install svn

yum install autoconfautomake libtool cmake

yum install ncurses-devel

yum install openssl-devel

yum install gcc*

本文出自 “钟茂霖博客” 博客，请务必保留此出处http://zhongml.blog.51cto.com/4808277/1867786