Hadoop 集群单点启动

系统管理员 2022-02-25 01:28 267阅读 0赞

### 文章目录 ###

*   *  格式化 NameNode
     *  启动
     *   *  启动 HDFS
     *  查看

## 格式化 NameNode ##

如果集群是第一次启动，需要格式化 NameNode。

##删除之前留下的data、log
    [root@hadoop102 hadoop-2.7.2]# rm -rf data/ logs/ 
    [root@hadoop103 hadoop-2.7.2]# rm -rf data/ logs/
    [root@hadoop104 hadoop-2.7.2]# rm -rf data/ logs/

hdfs namenode -format

## 启动 ##

### 启动 HDFS ###

##在 hadoop102 上启动 NameNode、DataNode
    [root@hadoop102 hadoop-2.7.2]# hadoop-daemon.sh start namenode
    starting namenode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-namenode-hadoop102.out
    [root@hadoop102 hadoop-2.7.2]# hadoop-daemon.sh start datanode
    starting datanode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop102.out
    [root@hadoop102 hadoop-2.7.2]# 
    ##在 hadoop103 上启动 DataNode
    [root@hadoop103 hadoop-2.7.2]#  hadoop-daemon.sh start datanode
    starting datanode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop104.out
    ##在 hadoop104 上启动 DataNode
    [root@hadoop104 hadoop-2.7.2]#  hadoop-daemon.sh start datanode
    starting datanode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop104.out

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## 查看 ##

[http://hadoop102:50070][http_hadoop102_50070]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lsanBocA_size_16_color_FFFFFF_t_70 1]  
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单点启动需要到每个服务上去启动，非常麻烦。  
[下一篇是《集群群起》。][Link 1]

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[http_hadoop102_50070]: http://hadoop102:50070/dfshealth.html#tab-overview
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lsanBocA_size_16_color_FFFFFF_t_70 1]: /images/20220225/751c1c9ebbd24746bad33a2bb592a688.png
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[Link 1]: https://blog.csdn.net/yljphp/article/details/88926677