Hadoop 集群群起

矫情吗；* 2022-02-25 01:30 262阅读 0赞

### 文章目录 ###

*   *  配置 slaves
     *  启动 HDFS
     *  启动 Yarn
     *  查看
     *  停止

<table> 
 <thead> 
  <tr> 
   <th></th> 
   <th>hadoop102</th> 
   <th>hadoop103</th> 
   <th>hadoop104</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>HDFS</td> 
   <td>NameNode <br>DataNode</td> 
   <td>DataNode</td> 
   <td>SecondaryNameNode<br> DataNode</td> 
  </tr> 
  <tr> 
   <td>YARN</td> 
   <td>NodeManager</td> 
   <td>ResourceManager<br> NodeManager</td> 
   <td>NodeManager</td> 
  </tr> 
 </tbody> 
</table>

## 配置 slaves ##

/opt/module/hadoop-2.7.2/etc/hadoop/slaves

[root@hadoop102 hadoop] vim slaves 
    hadoop102
    hadoop103
    hadoop104

分发

[root@hadoop102 hadoop] xsync slaves 
    fname=slaves
    pdir=/opt/module/hadoop-2.7.2/etc/hadoop
    --------------------- hadoop102 ----------------
    sending incremental file list
    
    sent 29 bytes  received 12 bytes  82.00 bytes/sec
    total size is 30  speedup is 0.73
    --------------------- hadoop103 ----------------
    sending incremental file list
    slaves
    
    sent 102 bytes  received 37 bytes  92.67 bytes/sec
    total size is 30  speedup is 0.22
    --------------------- hadoop104 ----------------
    sending incremental file list
    slaves
    
    sent 102 bytes  received 37 bytes  278.00 bytes/sec
    total size is 30  speedup is 0.22

确认103配置已更新

[root@hadoop103 hadoop] cat slaves 
    hadoop102
    hadoop103
    hadoop104

## 启动 HDFS ##

[root@hadoop102 hadoop] start-dfs.sh 
    Starting namenodes on [hadoop102]
    hadoop102: starting namenode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-namenode-hadoop102.out
    hadoop102: starting datanode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop102.out
    hadoop104: starting datanode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop104.out
    hadoop103: starting datanode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-datanode-hadoop103.out
    Starting secondary namenodes [hadoop104]
    hadoop104: starting secondarynamenode, logging to /opt/module/hadoop-2.7.2/logs/hadoop-root-secondarynamenode-hadoop104.out

查看

[root@hadoop102 hadoop] jps
    2896 NameNode
    3025 DataNode
    3226 Jps
    [root@hadoop103 hadoop] jps
    2614 Jps
    2541 DataNode
    [root@hadoop104 ~] jps
    2885 Jps
    2742 DataNode
    2838 SecondaryNameNode

## 启动 Yarn ##

[root@hadoop103 hadoop] start-yarn.sh 
    starting yarn daemons
    starting resourcemanager, logging to /opt/module/hadoop-2.7.2/logs/yarn-root-resourcemanager-hadoop103.out
    hadoop102: starting nodemanager, logging to /opt/module/hadoop-2.7.2/logs/yarn-root-nodemanager-hadoop102.out
    hadoop104: starting nodemanager, logging to /opt/module/hadoop-2.7.2/logs/yarn-root-nodemanager-hadoop104.out
    hadoop103: starting nodemanager, logging to /opt/module/hadoop-2.7.2/logs/yarn-root-nodemanager-hadoop103.out

查看

[root@hadoop103 hadoop] jps
    2674 ResourceManager
    2773 NodeManager
    3068 Jps
    2541 DataNode
    [root@hadoop102 hadoop] jps
    2896 NameNode
    3025 DataNode
    3379 Jps
    3277 NodeManager
    [root@hadoop104 ~] jps
    2742 DataNode
    2838 SecondaryNameNode
    3081 Jps
    2972 NodeManager

## 查看 ##

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## 停止 ##

先在hadoop103停止yarn

[root@hadoop103 ~]# stop-yarn.sh
    stopping yarn daemons
    stopping resourcemanager
    hadoop103: stopping nodemanager
    hadoop102: stopping nodemanager
    hadoop104: stopping nodemanager
    no proxyserver to stop

然后在hadoop102停止hdfs

[root@hadoop102 ~]# stop-dfs.sh 
    Stopping namenodes on [hadoop102]
    hadoop102: stopping namenode
    hadoop103: stopping datanode
    hadoop102: stopping datanode
    hadoop104: stopping datanode
    Stopping secondary namenodes [hadoop104]
    hadoop104: stopping secondarynamenode

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