linux centos/debian下hadoop2.6.5单机伪分布式安装

柔情只为你懂 2023-10-05 15:19 6阅读 0赞

### 官方文档 ###

[hadoop2.6.5官方安装文档][hadoop2.6.5]

### 配置`/etc/hosts` ###

增加节点名称`node01`  
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### 修改hdp配置文件 ###

`cd /opt/hadoop-2.6.5/etc/hadoop`  
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**第一个：hadoop-env.sh**

vim hadoop-env.sh
    export JAVA_HOME=${JAVA_HOME}
    export JAVA_HOME=/opt/jdk1.8.0_271

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**第二个：core-site.xml**

<configuration>
            
            <property>
                    <name>fs.defaultFS</name>
                    <value>hdfs://node01:9000</value>
            </property>
            
            <property>
                    <name>hadoop.tmp.dir</name>
                    <value>/opt/hadoop-2.6.5/tmp</value>
            </property>
    </configuration>

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**第三个：hdfs-site.xml**

<configuration>
             
            <property>
                    <name>dfs.replication</name>
                    <value>1</value>
            </property>
            <property>
            	<name>dfs.secondary.http.address</name>
    			
            	<value>node01:50090</value>
        	</property>
    </configuration>

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对于目录更详尽的配置：

<property>
            <name>dfs.replication</name>
            <value>1</value>
    </property>
    <property>
            <name>dfs.namenode.name.dir</name>
            <value>/opt/hadoop-2.6.5/local/dfs/name</value>
    </property>
    <property>
            <name>dfs.datanode.data.dir</name>
            <value>/opt/hadoop-2.6.5/local/dfs/data</value>
    </property>
    <property>
            <name>dfs.namenode.secondary.http-address</name>
            <value>node01:50090</value>
    </property>
    <property>
            <name>dfs.namenode.checkpoint.dir</name>
            <value>/opt/hadoop-2.6.5/local/dfs/secondary</value>
    </property>

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**第四个：mapred-site.xml (需要从此文件复制mapred-site.xml.template)**

cp mapred-site.xml.template mapred-site.xml

<configuration>
        
        <property>
                <name>mapreduce.framework.name</name>
                <value>yarn</value>
        </property>
     </configuration>

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**第五个：yarn-site.xml**

<configuration>
            
            <property>
                    <name>yarn.nodemanager.aux-services</name>
                    <value>mapreduce_shuffle</value>
            </property>
            
            <property>
                    <name>yarn.resourcemanager.hostname</name>
                    <value>node01</value>
            </property>
    </configuration>

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### 初始化namenode ###

执行下述命令没有报错即为初始化正常：

hdfs namenode -format

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### 启动文HDFS和YARN ###

> 1.  为了避免`start-all.sh`脚本执行时需要多次输入密码，需配置`ssh localhost`免密登录。
> 2.  debian上最好以普通用户来执行该脚本。

start-all.sh

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接下来，使用jps查看进程情况
    jps（jps 在Linux/unix平台上简单察看当前java进程的一些简单情况），如果有以下进程则表示测试通过
    Jps （java进程）
    SecondaryNameNode （相当于NameNode的助理）
    DataNode （hdfs部门的小弟，负责存放数据）
    NameNode （hdfs部门的老大）
    ResourceManager （yarn部门的老大，yarn负责资源管理）
    NodeManager （yarn部门的小弟，可以一个，集群的话会有很多）

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[hadoop2.6.5]: https://hadoop.apache.org/docs/r2.6.5/hadoop-project-dist/hadoop-common/SingleCluster.html
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