hadoop僞分佈式的安裝

1. 解壓縮hadoop.tar
tar -zxvf hadoop2.5.2.tar.gz -C /opt/install
2. 修改配置文件 6個
HADOOP_HOME/etc/hadoop/...
2.1 hadoop-evn.sh
export JAVA_HOME=/usr/java/jdk1.7.0_80
2.2 core-site.xml
<!--namenode的總入口，須要修改成當期主機的主機名-->
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop1.baizhiedu.com:8020</value>
</property>
<!--hadoop臨時目錄，須要建立 data/tmp-->
<property>
<name>hadoop.tmp.dir</name>
<value>/opt/install/hadoop-2.5.2/data/tmp</value>
</property>
2.3 hdfs-site.xml
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
2.4 yarn-site.xml
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
2.5 mapred-site.xml
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
2.6 slaves (datanode)
hadoop1.baizhiedu.com
3. 格式化文件系統 hadoop_home
bin/hdfs namenode -format
4. 啓動hadoop相關進程
sbin/hadoop-daemon.sh start namenode
sbin/hadoop-daemon.sh start datanode
sbin/yarn-daemon.sh start resourcemanager
sbin/yarn-daemon.sh start nodemanager
5. 驗證
ps -ef | grep java