云服务器下Hadoop配置

在之前的文章中，我们已经讨论过虚拟机下的hadoop怎么写，在此基础上，由于云服务器的特殊性，才有了以下内容。

集群SSH免密登陆设置

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• hosts文件设置

vi /etc/hosts 添加内容

本机内网ip master
slave外网ip slave

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• hostname修改
• ssh设置

https://blog.csdn.net/No_Game_No_Life_/article/details/87969819#Hadoop_75

Hadoop安装配置

开放端口

50070 9000 9001 8088 10020

配置

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• Master上配置

vi etc/hadoop/slaves

slave
localhost  #下面这个可以不写

vi etc/hadoop/core-site.xml

<configuration>
<property>
                <name>fs.defaultFS</name>
                <value>hdfs://master:9000</value>
        </property>
</configuration>

vi etc/hadoop/hdfs-site.xml

<configuration>
        <property>
                <name>dfs.replication</name>
                <value>1</value>
        </property>
<property>
        <name>dfs.namenode.name.dir</name>
        <value>file:///root/hadoop/tmp/dfs/name</value>
</property>
</configuration>

vi etc/hadoop/mapred-site.xml

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

vi etc/hadoop/yarn-site.xml

<configuration>

<!-- Site specific YARN configuration properties -->
    <property>
        <name>yarn.resourcemanager.hostname</name>
        <value>master</value>
    </property>
<property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
  </property>
  <property>
    <name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
    <value>org.apache.hadoop.mapred.ShuffleHandler</value>
  </property>
</configuration>

vi etc/hadoop/hadoop-env.sh

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export JAVA_HOME=/opt/java/jdk1.8.0_162

---

• Slave上配置
  vi etc/hadoop/slaves

slave
localhost  #下面这个可以不写

vi etc/hadoop/core-site.xml

<configuration>
<property>
                <name>fs.defaultFS</name>
                <value>hdfs://master:9000</value>
        </property>
</configuration>

vi etc/hadoop/hdfs-site.xml

<configuration>
        <property>
                <name>dfs.replication</name>
                <value>1</value>
        </property>
<property>
        <name>dfs.datanode.data.dir</name>
        <value>file:///root/hadoop/tmp/dfs/data</value>
</property>
</configuration>

vi etc/hadoop/mapred-site.xml

<configuration>
        <property>
                <name>mapreduce.framework.name</name>
                <value>yarn</value>
        </property>
<property>
        <name>mapreduce.jobhistory.address</name>
        <value>master:10020</value>
</property>
</configuration>

vi etc/hadoop/yarn-site.xml

<configuration>

<!-- Site specific YARN configuration properties -->
        <property>
                <name>yarn.resourcemanager.hostname</name>
                <value>master</value>
        </property>
<property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
  </property>
  <property>
    <name>yarn.nodemanager.aux-services.mapreduce_shuffle.class</name>
    <value>org.apache.hadoop.mapred.ShuffleHandler</value>
  </property>
</configuration>

etc/hadoop/hadoop-env.sh

export JAVA_HOME=/opt/java/jdk1.8.0_162

格式化HDFS（Master，Slave）

hadoop namenode -format

启动Hadoop

sbin/start-all.sh
启动job history server
sbin/mr-jobhistory-daemon.sh start historyserver

验证是否安装成功

详见 https://blog.csdn.net/No_Game_No_Life_/article/details/87969819