Mac hadoop伪分布式安装

原地址1
原地址2
Hadoop on Mac
在Mac OS x 10.11.6

以下操作基于Hadoop 2.8.0，
环境：Java version 1.8.0

1.开启ssh和远程登陆
- 偏好设置－>共享－>远程访问－>允许所有人

ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsacat ~/.ssh/id_dsa.pub >>~/.ssh/authorized_keys

2.安装hadoop

brew install hadoop

3.配置伪分布式
需要修改一系列文件，文件在/usr/local/Cellar/hadoop/2.8.0/libexec/etc/hadoop中

• 修改hadoop-env.sh
  注释掉

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"

添加

export HADOOP_OPTS="${HADOOP_OPTS} -Djava.security.krb5.realm= -Djava.security.krb5.kdc="export HADOOP_OPTS="${HADOOP_OPTS} -Djava.security.krb5.conf=/dev/null"

• 修改yarn-env.sh
  添加

YARN_OPTS="$YARN_OPTS -Djava.security.krb5.realm=OX.AC.UK -Djava.security.krb5.kdc=kdc0.ox.ac.uk:kdc1.ox.ac.uk"

• 修改 core-site.xml

<configuration> <property>   <name>hadoop.tmp.dir</name>   <value>/tmp/hadoop-${user.name}</value>   <description>A base for other temporary directories.</description> </property> <property>   <name>fs.default.name</name>   <value>hdfs://localhost:9000</value> </property></configuration>

• 修改 hdfs-site.xml

<configuration> <property>     <name>dfs.replication</name>     <value>1</value> </property> <property>  <name>dfs.namenode.name.dir</name>  <value>${user.home}/hadoop/data/namenode</value></property><property>  <name>dfs.datanode.data.dir</name>  <value>${user.home}/hadoop/data/datanode</value></property</configuration>

• 修改 mapred-site.xml

cp /usr/local/Cellar/hadoop/2.5.0/libexec/etc/hadoop/mapred-site.xml.template /usr/local/Cellar/hadoop/2.5.0/libexec/etc/hadoop/mapred-site.xml

<configuration>  <property>    <name>mapred.job.tracker</name>    <value>localhost:9001</value>  </property>  <property>  <name>mapreduce.framework.name</name>  <value>yarn</value></property></configuration>yarn-site.xml<configuration>        <property>                <name>yarn.resourcemanager.address</name>                <value>localhost:8032</value>        </property>        <property>                <name>yarn.nodemanager.aux-services</name>                <value>mapreduce_shuffle</value>        </property></configuration>

4.运行Hadoop

$ cd /usr/local/Cellar/hadoop/2.5.0/libexec/sbin$ ./start-dfs.sh$ ./start-yarn.sh

Tips: 如果出现Warning

WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform… using builtin-java classes where applicable
只是因为hadoop为32位，你的系统为64位，没什么大问题，不用管。

5.检查运行状态

jps

6.可以通过一下网址查看状态
Cluser status: http://localhost:8088
HDFS status: http://localhost:50070
Secondary NameNode status: http://localhost:50090