Hadoop Install (1) ——Hadoop 伪分布式安装

参考: https://hadoop.apache.org/docs/r2.9.2/hadoop-project-dist/hadoop-common/SingleCluster.html

需要修改/etc/hostname、/etc/hosts、安装JDK、下载Hadoop tar包

1. 配置hadoop-env.sh

export JAVA_HOME=/opt/soft/jdk1.8.0_191

2. 配置core-site.xml
   编辑etc/hadoop/core-site.xml

<configuration>
<property>
    <!-- The name of the default file system. A URI whose scheme and authority determine the FileSystem implementation. default value: file:/// -->
        <name>fs.defaultFS</name>
        <value>hdfs://localhost:9000</value>
    </property>
<property>
    <!-- A base for other temporary directories.default value: /tmp/hadoop-${user.name} -->
        <name>hadoop.tmp.dir</name>
        <value>/opt/soft/hadoop-2.9.1/hadoop-tmp</value>
    </property>
</configuration>

3. 配置hdfs-site.xml
   编辑etc/hadoop/hdfs-site.xml

<configuration>
    <property>
    <!-- Default block replication. The actual number of replications can be specified when the file is created. The default is used if replication is not specified in create time. Default value: 3 -->
        <name>dfs.replication</name>
        <value>1</value>
    </property>
</configuration>

4.配置免密登陆本机
5.格式化namenode

hadoop namenode -format