Hadoop 2.5 伪分布安装

首先安装准备工具

 $ sudo apt-get install ssh
  $ sudo apt-get install rsync配置ssh  $ ssh localhostIf you cannot ssh to localhost without a passphrase, execute the following commands:  $ ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
  $ cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys

进入etc/hadoop/hadoop-env.sh 配置运行环境

  # set to the root of your Java installation
  export JAVA_HOME=/usr/java/latest

  # Assuming your installation directory is /usr/local/hadoop
  export HADOOP_PREFIX=/usr/local/hadoop

配置hdfs端口和备份数

etc/hadoop/core-site.xml:

<configuration>
    <property>
        <name>fs.defaultFS</name>
        <value>hdfs://localhost:9000</value>
    </property><property>#ClientDatanodeProtocol 调用getBlockLocalPathInfo的时候
          <name>dfs.block.local-path-access.user</name>
          <value>infomorrow</value>
    </property>
    <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
    <property>
        <name>hadoop.tmp.dir</name>
        <value>/home/infomorrow/hadoop-tmp</value>   
    </property> </configuration>
etc/hadoop/hdfs-site.xml:

<configuration>
    <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
</configuration>

配置使用yarn

etc/hadoop/mapred-site.xml:

<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
</configuration>
etc/hadoop/yarn-site.xml:

NodeManager 在 启 动 时 加 载shuffle server,shuffle server 实 际 上 是 Jetty/Netty Server,Reduce Task 通 过 该 server 从 各 个NodeManager 上远程复制 Map Task 产生的中间结果

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

启动过程：

hdfs

  $ bin/hdfs namenode -format （初次使用时）  $ sbin/start-dfs.sh进入监控页查看 - http://localhost:50070/在hdfs上创建文件夹

  $ bin/hdfs dfs -mkdir /user
  $ bin/hdfs dfs -mkdir /user/<username>查看hdfs上创建的文件夹 bin/hadoop fs -ls /yarn

$ sbin/start-yarn.sh进入监控页查看 - http://localhost:8088/关闭：

 $ sbin/stop-dfs.sh $ sbin/stop-yarn.sh

bin/hadoop dfsadmin -safemode leave  退出安全模式

如需使用spark 只需在集群节点安装scala,spark,并在spark-env.sh中添加配置

export SCALA_HOME=/home/juxinli/scala-2.11.5
export JAVA_HOME=/usr/lib/jvm/java-8-sun
export HADOOP_HOME=/home/juxinli/hadoop-2.5.0
export YARN_CONF_DIR=$HADOOP_HOME/etc/hadoop-2.5.0 
export SPARK_JAR=/home/juxinli/spark-1.2.0-bin-hadoop2.4/lib/spark-assembly-1.2.0-hadoop2.4.0.jar

在slaves添加节点主机名

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