ubuntu下hadoop单节点安装

1.安装准备

a.下载hadoop:hadoop下载地址
b.必须先安装好Java,参考:java安装
c.必须先安装好SSH服务,SSH服务安装:

  $ sudo apt-get install ssh
  $ sudo apt-get install rsync

2.解压安装包

tar -zxvf hadoop-2.7.3.tar.gz 

3.修改配置文件

a. vi /opt/hadoop-2.7.3/etc/hadoop/core-site.xml

<configuration>
    <property>
        <name>fs.defaultFSname>
        <value>hdfs://localhost:9000value>
    property>
configuration>

b. vi /opt/hadoop-2.7.3/etc/hadoop/hdfs-site.xml

<configuration>
    <property>
        <name>dfs.replicationname>
        <value>1value>
    property>
configuration>

c. vi /opt/hadoop-2.7.3/etc/hadoop/hadoop-env.sh
修改JAVA_HOME, HADOOP_CONF_DIR

# The java implementation to use.
export JAVA_HOME=/opt/jdk1.8.0_101

# The jsvc implementation to use. Jsvc is required to run secure datanodes
# that bind to privileged ports to provide authentication of data transfer
# protocol.  Jsvc is not required if SASL is configured for authentication of
# data transfer protocol using non-privileged ports.
#export JSVC_HOME=${JSVC_HOME}

export HADOOP_CONF_DIR=${HADOOP_CONF_DIR:-"/opt/hadoop-2.7.3/etc/hadoop"}

d. vi /opt/hadoop-2.7.3/etc/hadoop/mapred-site.xml

<configuration>
    <property>
        <name>mapred.job.trackername>
        <value>hdfs://localhost:9001value>
    property>
configuration>

4.修改ssh免秘钥

a. 使用ssh-keygen生成秘钥对
b.复制到信任用户中

cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys

5.设置HADOOP_HOME

vi /etc/profile

export HADOOP_HOME=/opt/hadoop-2.7.3

source /etc/profile

5.format文件系统

$HADOOP_HOME/bin/hdfs namenode -format

6.启动hadoop

$HADOOP_HOME/sbin/start-dfs.sh

7.查看是否启动成功

官方参考文档：

http://hadoop.apache.org/docs/r2.7.3/hadoop-project-dist/hadoop-common/SingleCluster.html