Hadoop-HDFS的伪分布式和完全分布式集群搭建

逃离我推掉我的手 2021-12-14 09:37 372阅读 0赞

转自：  [https://blog.csdn.net/mhw666/article/details/91610598][https_blog.csdn.net_mhw666_article_details_91610598]

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Hadoop-HDFS  
HDFS伪分布式集群搭建步骤  
一、配置免密登录

ssh-keygen -t rsa  
1  
一句话回车到底

ssh-copy-id -i ~/.ssh/id\_rsa.pub root@node01  
1  
跟随提示进行，一般需要yes确认之后输入一次密码就成功了  
如果没配置免密登录的话，会出现登录和退出HDFS时，所有节点都需要输一遍密码。(本人亲身实践，虽然还是启动成功了)

二、上传jdk和hadoop压缩包  
可以使用ftp或者使用命令rz

yum install lrzsz -y  
1  
三、解压jdk和hadoop压缩包  
建议可以解压到统一的目录下  
tar -zxvf 压缩包名  
四、配置环境变量

export JAVA\_HOME=/opt/software/jdk1.8.0\_121  
export PATH=$PATH:$JAVA\_HOME/bin  
  
必须让环境变量生效，代码如下:

source /etc/profile  
1  
PS：用户变量 .bashrc  
系统变量    /etc/profile  
系统操作命令(文件的增删改查)    bin  
系统管理命令(集群的启动、关闭)    sbin  
hadoop配置信息    etc/hadoop  
五、修改配置文件  
① slaves配置Datanode节点  
② 修改hdfs-site.xml

//设置备份个数  
            <property>  
                <name>dfs.replication</name>       
                <value>1</value>  
            </property>  
     //secondaryNamenode  
            <property>       
                   <name>dfs.namenode.secondary.http-address</name>    
                   <value>node01:50090</value>  
               </property>  
  
③ 修改core-site.xml

//namenode  
           <property>  
                <name>fs.defaultFS</name>              
                <value>hdfs://node01:9000</value>      
            </property>  
         //namenode启动后产生的信息  
         <property>  
             <name>hadoop.tmp.dir</name>            
             <value>/var/abc/hadoop/local</value>  
         </property>  
  
④ 把\*-env.sh的文件内部所有的java路径改为绝对路径  
六、格式化  
让所有文件生效，此命令在/opt/software/hadoop/bin目录下

hdfs namenode -format  
1  
七、启动命令  
此命令在/opt/software/hadoop/sbin目录下

./start-dfs.sh  
1  
八、配置hadoop的环境变量  
配置完这两条环境变量之后，可以在任意目录下启动Hadoop集群

export HADOOP\_HOME=/opt/software/hadoop-2.6.5  
export PATH=$PATH:$HADOOP\_HOME/bin:$HADOOP\_HOME/sbin  
1  
2  
九、操作HDFS文件系统  
创建根目录，首先要写换到hadoop的bin目录下

./hdfs dfs -mkdir -p /user/root  
1  
通过命令hdfs dfs -put 文件名或目录名，上传文件

十、本人在配置时出现的一些问题  
/etc/hosts中的网络映射信息必须配置对  
配置完环境变量后必须使用source /ect/profile使它生效

HDFS完全分布式集群配置  
我是这么做的：  
先克隆一台虚拟机，进行一下操作  
一、修改hdfs-site.xml配置文件  
value的数量不能超过节点数  
第二个property标签配置的是secondarynamenode，节点要和主节点Namenode不同

<property>  
        <name>dfs.replication</name>  
        <value>3</value>  
</property>  
<property>     
    
 <name>dfs.namenode.secondary.http-address</name>  
     <value>node02:50090</value>  
</property>  
  
二、修改core-site.xml配置文件  
第一个property标签是配置主节点Namenode  
第二个property标签是配置集群启动时产生的信息

<property>  
        <name>fs.defaultFS</name>  
        <value>hdfs://node01:9000</value>  
</property>  
<property>  
        <name>hadoop.tmp.dir</name>  
        <value>/var/abc/hadoop/cluster</value>  
</property>  
  
三、修改slaves配置文件  
修改主节点的slaves配置文件如下

node02   
node03   
node04  
1  
2  
3  
进行完这三个操作后再克隆三台虚拟机，然后配置各自的网络  
四、配置网络

（之后补充）大概就是修改/ect/sysconfig/network的主机名，修改/ect/sysconfig/network-scripts/ifcfg-eth0中的IP地址，IPADDR修改为此虚拟机的IP，GATEWAY和DNS1为虚拟机的网关，DNS2随意，如下图也行，  
修改完成后使用命令service network restart重启网卡，如果还有问题就删掉第二行和地四行，删掉之后若还有问题，请自行百度

，删除rm -rf /etc/udev/rules.d/70-persistent-net.rules文件，重要的事情说三遍！  
重启虚拟机！！！！！！！！！！！！！！  
重启虚拟机！！！！！！！！！！！！！！  
重启虚拟机！！！！！！！！！！！！！！

在各自的/ect/hosts目录下配置四台虚拟机的网络映射  
代码可以参照如下:  
注意：IP不可以冲突，必须每台虚拟机都配置

192.168.145.131    node01  
192.168.145.132    node02  
192.168.145.133    node03  
192.168.145.134    node04  
  
五、格式化  
让所有文件生效，此命令在/opt/software/hadoop/bin目录下

hdfs namenode -format  
1  
六、启动命令  
此命令在主节点/opt/software/hadoop/sbin目录下

./start-dfs.sh  
\---------------------   
作者：MKing1994   
来源：CSDN   
原文：https://blog.csdn.net/mhw666/article/details/91610598   
版权声明：本文为博主原创文章，转载请附上博文链接！

[https_blog.csdn.net_mhw666_article_details_91610598]: https://blog.csdn.net/mhw666/article/details/91610598
[https_blog.csdn.net_lz6363_article_details_91883885]: https://blog.csdn.net/lz6363/article/details/91883885
[https_blog.csdn.net_LOYE_YOU_article_details_91615228]: https://blog.csdn.net/LOYE_YOU/article/details/91615228
[https_blog.csdn.net_huweijun_2012_article_details_91612956]: https://blog.csdn.net/huweijun_2012/article/details/91612956
[https_blog.csdn.net_weixin_43606158_article_details_91884859]: https://blog.csdn.net/weixin_43606158/article/details/91884859
[https_blog.csdn.net_weixin_44420511_article_details_91884834]: https://blog.csdn.net/weixin_44420511/article/details/91884834
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