Hadoop单机版环境部署

矫情吗；* 2023-10-06 17:54 71阅读 0赞

#### 前言 ####

#### Hadoop 部署 ####

##### 1. 环境 centos7 + Java8 + hadoop3.2.2 #####

wget https://dlcdn.apache.org/hadoop/common/hadoop-3.2.2/hadoop-3.2.2.tar.gz

运行需要Java 环境依赖，我之前已经配置过了。这里简单说下。

#这里 配置java的环境 还要配置 Hadoop的环境
    vi /etc/profile

#java environment
    export JAVA_HOME=/usr/local/java/jdk1.8.0_291
    export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
    export PATH=$PATH:$JAVA_HOME/bin
    
    #hadoop 
    export HADOOP_HOME=/usr/local/work/hadoop/hadoop-3.2.2
    export PATH=$PATH:$HADOOP_HOME/bin:/$HADOOP_HOME/sbin

配置生效

source /etc/profile

##### 2.解压jar,创建hadoop 存放数据的目录 #####

tar -zxf hadoop-3.2.2.tar.gz

我在解压后的文件下创建 flhaddop ，然后创建对应的 Hadoop 不同数据存放为文件。

# 在flhadoop 文件下依次创建 hdfs（在这个文件下 在创建 data 和 name ） log（存放日志） tmp(临时文件) 
    mkdir hdfs

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70]

##### 3.修改hadoop-env.sh #####

cd hadoop-3.2.2/etc/hadoop/
    
    vi hadoop-env.sh

加上一句 命令

export JAVA_HOME=/usr/local/java/jdk1.8.0_291/

##### 4.core-site.xml，这个文件是配置hdfs访问路劲，和namenode临时文件夹路劲 #####

<configuration>
    <property>
         <name>fs.defaultFS</name>
         <value>hdfs://10.26.118.120:9001</value>
    </property>
    
    <property>
          <name>hadoop.tmp.dir</name>
          <value>file:/usr/local/work/hadoop/hadoop-3.2.2/flhadoop/tmp</value>
    </property>
    </configuration>

##### 5.hdfs-site.xml。这文件是配置元数据和datanode数据的存放路径 #####

<configuration>
    <property>
         <name>dfs.namenode.name.dir</name>
         <value>file:/usr/local/work/hadoop/hadoop-3.2.2/flhadoop/hdfs/name</value>
    </property>
    
    <property>
         <name>dfs.datanode.data.dir</name>
         <value>file:/usr/local/work/hadoop/hadoop-3.2.2/flhadoop/hdfs/data</value>
    </property>
    
    <property>
          <name>dfs.replication</name>
          <value>1</value>
    </property>
    </configuration>

#### 6.初始化 ####

cd /usr/local/work/hadoop/hadoop-3.2.2/bin/
    ## 执行
    hdfs namenode -format

出现下图说明成功了，此时jps查看是没有namenode，需要去启动  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 1]

##### 7. 启动Hadoop #####

分别启动namenode，datanode，secondarynamenode。  
在 sbin 目录下执行

./hadoop-daemon.sh start namenode

./hadoop-daemon.sh start datanode

./hadoop-daemon.sh start secondarynamenode

hadoop 常用启动和停止命令总结：  
[https://blog.csdn.net/weixin\_43975771/article/details/119993527][https_blog.csdn.net_weixin_43975771_article_details_119993527]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 2]  
验证:  
输入 ./hadoop fs -ls / 没报错 说明部署成功。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 3]

##### 特别注意：HaDoop3.0之前web访问端口是50070 hadoop3.0之后web访问端口为9870 #####

ip:9870/dfshealth.html\#tab-overview 看下  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 4]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20210608092910838.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20210608094108862.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ==,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_weixin_43975771_article_details_119993527]: https://blog.csdn.net/weixin_43975771/article/details/119993527
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20210608094511824.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20210608094630749.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ_size_16_color_FFFFFF_t_70 4]: https://img-blog.csdnimg.cn/20210608094800564.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80Mzk3NTc3MQ==,size_16,color_FFFFFF,t_70