Hadoop2.8.2安装与配置(单机)
下载Hadoop
解压并移动到/software目录:
tar -zxvf hadoop-2.8.2.tar.gz
mv hadoop-2.8.2 /software/hadoop
在/etc/profile
文件添加:
export HADOOP_HOME=/software/hadoop
export HADOOP_INSTALL=$HADOOP_HOME
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export PATH=$HADOOP_HOME/sbin:$HADOOP_HOME/bin:$PATH
export CLASSPATH=$($HADOOP_HOME/bin/hadoop classpath):$CLASSPATH
保存并且更新/etc/profile文件:source /etc/profile
。
编辑hadoop-env.sh
文件:vim $HADOOP_HOME/etc/hadoop/hadoop-env.sh
,在最后加上:
export JAVA_HOME=/software/jdk
修改Configuration文件:vim $HADOOP_HOME/etc/hadoop/core-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
修改hdfs-site.xml:vim $HADOOP_HOME/etc/hadoop/hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
</configuration>
修改mapred-site.xml:
cp $HADOOP_HOME/etc/hadoop/mapred-site.xml.template $HADOOP_HOME/etc/hadoop/mapred-site.xml
vim $HADOOP_HOME/etc/hadoop/mapred-site.xml
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
修改yarn-site.xml:vim $HADOOP_HOME/etc/hadoop/yarn-site.xml
<configuration>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
初始化hadoop:
hdfs namenode –format
启动
$HADOOP_HOME/sbin/start-all.sh
输入jps查看是否成功:
检查WebUI,浏览器打开端口:http://localhost:8088
这里是用宿主机访问虚拟机,所以ip是虚拟机的ip。
停止
$HADOOP_HOME/sbin/stop-all.sh
安装完成。
但是在启动时候有一个警告,提示hadoop不能加载本地库:
解决方法:
在/etc/profile中添加:
HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib:$HADOOP_COMMON_LIB_NATIVE_DIR"
保存并更新文件:source /etc/profile
并且在hadoop-env.sh添加: vim $HADOOP_HOME/etc/hadoop/hadoop-env.sh
export HADOOP_HOME=/software/hadoop
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib:$HADOOP_COMMON_LIB_NATIVE_DIR"