mac Hadoop安装

一、 下载jdk

选择最新版本下载，地址：http://www.oracle.com/technetwork/java/javase/downloads/index.html

安装完成之后，打开终端，输入java -version ,出现类似如下说明安装成功。

java version "1.8.0"

Java(TM) SE Runtime Environment (build 1.8.0-b132)

Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)

二、 配置hadoop

下载hadoop，自己可到官网下载稳定版本，本次搭建用的是hadoop-2.6.0

配置hadoop 里面hadoop-2.6.0/etc/hadoop文件夹四个文件（hadoop-env.sh,core-site.xml,mapred-site.xml,hdfs-site.xml）

下载完hadoop之后，把它解压到你想存放的文件夹，然后进入hadoop的etc/hadoop目录

1.   配置hadoop-env.sh

修改为：

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.7.0_79.jdk/Contents/Home

export HADOOP_HEAPSIZE=2000

export HADOOP_OPTS=-server

即去掉前面的解释符#，mac的jdk安装在根目录Libray文件夹下面。

2.   配置core-site.xml

<configuration>

    <property>

        <name>hadoop.tmp.dir</name>

        <value>file:/Users/duwei/software/hadoop-2.6.0/tmp</value>

    </property>

    <property>

        <name>fs.default.name</name>

        <value>hdfs://hadoop0:9000</value>

    </property>

</configuration>

3.   配置mapred-site.xml

<configuration>

    <property>

        <name>mapred.job.tracker</name>

        <value>hdfs://localhost:9001</value>

    </property>

</configuration>

4.   配置hdfs-site.xml

<configuration>

    <property>

        <name>dfs.namenode.name.dir</name>

        <value>/Users/duwei/software/hadoop-2.6.0/hdfs/namenode</value>

    </property>

    <property>

        <name>dfs.datanode.data.dir</name>

        <value>/Users/duwei/software/hadoop-2.6.0/hdfs/datanode</value>

    </property>

    <property>

        <name>dfs.replication</name>

        <value>1</value>

    </property>

</configuration>

三、 配置ssh，无密码登录

mac上已经ssh了，在终端输入ssh-keygen -t rsa命令，碰到需要输入密码的直接按enter健即可。出现如下成功

·       Enter passphrase (empty for no passphrase):

·       Enter same passphrase again:

·       Your identification has been saved in /Users/jia/.ssh/id_rsa.

·       Your public key has been saved in /Users/jia/.ssh/id_rsa.pub.

·       The key fingerprint is:

·       d4:85:aa:83:ae:db:50:48:0c:5b:dd:80:bb:fa:26:a7 [email protected]

·       The key's randomart image is:

·       +--[ RSA 2048]----+

·       |. .o.o     ..    |

·       | =. . .  ...     |

·       |. o.    ...      |

·       | ...   ..        |

·       |  .... .S        |

·       |  ... o          |

·       | ...   .         |

·       |o oo.            |

·       |E*+o.            |

·       +-----------------+

在终端输入cd ~进入用户目录，再输入cd .ssh目录，输入命令

cp id_rsa.pub authorized_keys即可

四、 启动hadoop

1.    进入hadoop文件夹，用如下命令格式化

cd bin

./hadoop namenode –format

/************************************************************

STARTUP_MSG: Starting NameNode

STARTUP_MSG:   host = JIAS-MacBook-Pro.local/192.168.1.3

STARTUP_MSG:   args = [-format]

STARTUP_MSG:   version = 0.20.2

STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r 911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010

************************************************************/

Re-format filesystem in /tmp/hadoop-jia/dfs/name ? (Y or N) Y

14/07/14 13:55:17 INFO namenode.FSNamesystem: fsOwner=jia,staff,everyone,localaccounts,_appserverusr,admin,_appserveradm,_lpadmin,com.apple.sharepoint.group.1,_appstore,_lpoperator,_developer,com.apple.access_screensharing,com.apple.access_ssh

14/07/14 13:55:17 INFO namenode.FSNamesystem: supergroup=supergroup

14/07/14 13:55:17 INFO namenode.FSNamesystem: isPermissionEnabled=true

14/07/14 13:55:17 INFO common.Storage: Image file of size 93 saved in 0 seconds.

14/07/14 13:55:17 INFO common.Storage: Storage directory /tmp/hadoop-jia/dfs/name has been successfully formatted.

14/07/14 13:55:17 INFO namenode.NameNode: SHUTDOWN_MSG:

/************************************************************

SHUTDOWN_MSG: Shutting down NameNode at JIAS-MacBook-Pro.local/192.168.1.3

************************************************************/

2.   启动hadoop守护进程

bin/start-all.sh

3.   停止hadoop守护进程

bin/stop-all.sh

五、 环境配置

~  cat .bash_profile

export JAVA_HOME=$(/usr/libexec/java_home -v 1.7)

export HADOOP_HOME=/Users/duwei/software/hadoop-2.6.0

export PATH=$PATH:$HADOOP_HOME/bin

用如下命令使其生效

source ~/.bash_profile