大数据---Hadoop安装教程（二）

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解压

前期工作已经将Hadoop解压到/opt/soft/目录下
并且改名为hadoop313—这里hadoop安装的版本为3.1.3

配置文件目录

切换到该目录

[root@hadoop hadoop313]# cd ./etc/hadoop

添加JAVA_HOME目录

[root@hadoop hadoop]# vim ./hadoop-env.sh

export JAVA_HOME=/opt/soft/jdk180

修改core-site.xml

<configuration>
  <property>
    <name>fs.defaultFS</name>
    <value>hdfs://gree143:9000</value>
  </property>
  <property>
    <name>hadoop.tmp.dir</name>
    <value>/opt/soft/hadoop313/data</value>
    <description>namenode上本地的hadoop临时文件夹</description>
  </property>
  <property>
    <name>hadoop.http.staticuser.user</name>
    <value>root</value>
  </property>
  <property>
    <name>io.file.buffer.size</name>
    <value>131072</value>
    <description>读写队列缓存128K</description>
  </property>
  <property>
    <name>hadoop.proxyuser.root.hosts</name>
    <value>*</value>
  </property>
  <property>
    <name>hadoop.proxyuser.root.groups</name>
    <value>*</value>
  </property>
</configuration>

修改hdfs-site.xml

<configuration>
  <property>
    <name>dfs.replication</name>
    <value>1</value>
    <description>hadoop中每一个block文件的备份数量</description>
  </property>
  <property>
    <name>dfs.namenode.name.dir</name>
    <value>/opt/soft/hadoop313/data/dfs/name</value>
    <description>namenode上存储hdfsq名字空间元数据的目录</description>
  </property>
  <property>
    <name>dfs.datanode.data.dir</name>
    <value>/opt/soft/hadoop313/data/dfs/data</value>
    <description>datanode上数据块的物理存储位置目录</description>
  </property>
  <property>
    <name>dfs.permissions.enabled</name>
    <value>false</value>
    <description>关闭权限验证</description>
  </property>
</configuration>

修改mapred-site.xml

<configuration>
  <property>
    <name>mapreduce.framework.name</name>
    <value>yarn</value>
    <description>job执行框架 local, classic or yarn</description>
    <final>true</final>
  </property>
  <property>
    <name>mapreduce.application.classpath</name>
    <value>/opt/soft/hadoop313/etc/hadoop:/opt/soft/hadoop313/share/hadoop/common/lib/*:/opt/soft/hadoop313/share/hadoop/common/*:/opt/soft/hadoop313/share/hadoop/hdfs/*:/opt/soft/hadoop313/share/hadoop/hdfs/lib/*:/opt/soft/hadoop313/share/hadoop/mapreduce/*:/opt/soft/hadoop313/share/hadoop/mapreduce/lib/*:/opt/soft/hadoop313/share/hadoop/yarn/*:/opt/soft/hadoop313/share/hadoop/yarn/lib/*</value>
  </property>
 
  <property>
    <name>mapreduce.jobhistory.address</name>
    <value>gree143:10020</value>
  </property>
  <property>
    <name>mapreduce.jobhistory.webapp.address</name>
    <value>gree143:19888</value>
  </property>
 
  <property>
    <name>mapreduce.map.memory.mb</name>
    <value>1024</value>
  </property>
  <property>
    <name>mapreduce.reduce.memory.mb</name>
    <value>1024</value>
  </property>
</configuration>

修改yarn-site.xml

<configuration>
 
<!-- Site specific YARN configuration properties -->
 
  <property>
    <name>yarn.resourcemanager.connect.retry-interval.ms</name>
    <value>20000</value>
  </property>
 
  
  <property>
    <name>yarn.resourcemanager.scheduler.class</name>
    <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
  </property>
 
  <property>
    <name>yarn.nodemanager.localizer.address</name>
    <value>gree143:8040</value>
  </property>
 
  <property>
    <name>yarn.nodemanager.address</name>
    <value>gree143:8050</value>
  </property>
 
  <property>
    <name>yarn.nodemanager.webapp.address</name>
    <value>gree143:8042</value>
  </property>
 
 
  <property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
  </property>
 
  <property>
    <name>yarn.nodemanager.local-dirs</name>
    <value>/opt/soft/hadoop313/yarndata/yarn</value>
  </property>
 
  <property>
    <name>yarn.nodemanager.log-dirs</name>
    <value>/opt/soft/hadoop313/yarndata/log</value>
  </property>
 
</configuration>

修改profile文件

[root@hadoop etc]# vim /etc/profile

# HADOOP_HOME
export HADOOP_HOME=/opt/soft/hadoop313
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$HADOOP_HOME/lib
export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export HDFS_JOURNALNODE_USER=root
export HDFS_ZKFC_USER=root
export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export HADOOP_YARN_HOME=$HADOOP_HOME
export HADOOP_INSTALL=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_LIBEXEC_DIR=$HADOOP_HOME/libexec
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop

刷新配置文件

[root@hadoop hadoop]# source /etc/profile

格式化命令

[root@hadoop hadoop]# hdfs namenode -format

重启hadoop命令

[root@hadoop hadoop]# start-all.sh

查看当前进程

[root@hadoop hadoop]# jps

可视化界面

输入ip地址9870

192.168.95.150:9870