-安装JDK1.8
https://abc.htmltoo.com/thread-46002.htm
-配置SSH免密登录
https://abc.htmltoo.com/thread-46001.htm
-hadoop: https://mirrors.bfsu.edu.cn/apache/hadoop/common/
cd /data/site/htmltoo.opt
wget https://mirrors.bfsu.edu.cn/apache/hadoop/common/hadoop-3.3.6/hadoop-3.3.6.tar.gz
tar -zxvf hadoop-3.3.6.tar.gz -C /opt/
mv /opt/hadoop-3.3.6 /opt/hadoop
echo 'export HADOOP_HOME=/opt/hadoop/' >> /etc/profile
echo 'export PATH=$PATH:$HADOOP_HOME/bin' >> /etc/profile
echo 'export PATH=$PATH:$HADOOP_HOME/sbin' >> /etc/profile
source /etc/profile
echo "export JAVA_HOME=/usr/java/default" >> /opt/hadoop/etc/hadoop/yarn-env.sh
echo "export JAVA_HOME=/usr/java/default" >> /opt/hadoop/etc/hadoop/hadoop-env.sh
hadoop version
---配置Hadoop
vim /opt/hadoop/etc/hadoop/core-site.xml
-在<configuration></configuration>节点内，插入如下内容
<property>
<name>hadoop.tmp.dir</name>
<value>file:/opt/hadoop/tmp</value>
<description>location to store temporary files</description>
</property>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
vim /opt/hadoop/etc/hadoop/hdfs-site.xml
-在<configuration></configuration>节点内，插入如下内容
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>file:/opt/hadoop/tmp/dfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>file:/opt/hadoop/tmp/dfs/data</value>
</property>
---启动Hadoop
-初始化namenode 。
hadoop namenode -format
-启动Hadoop。
start-dfs.sh
-在弹出的提示中，依次输入yes
start-yarn.sh
---可查看成功启动的进程。
jps
11620 DataNode
11493 NameNode
11782 SecondaryNameNode
11942 ResourceManager
12344 Jps
12047 NodeManager
---浏览器访问
http://<ECS公网IP>:8088和http://<ECS公网IP>:50070。
显示如下界面，则表示Hadoop伪分布式环境已搭建完成。
