hadoop的安装，主从设置及结合php的应用

最近又机会接触hadoop，顺便分享一下同事的记录

一、主服务器设置

1.创建用户

#useradd hadoop

2.设置密码

#passwd hadoop

3.切换hadoop登录

#su - hadoop

4.解压hadoop压缩包

#tar zxvf hadoop-1.0.3.tar.gz

5.设置目录权限

#chown -R hadoop.hadoop hadoop-1.0.3

6.编辑环境变量

#vim hadoop-1.0.3/conf/hadoop-env.sh

编辑“JAVA_HOME”路径：

export JAVA_HOME=/usr/local/jdk1.7.0_05

增加一行（取消过时警告）：

export HADOOP_HOME_WARN_SUPPRESS=1

7.编辑系统环境变量(使用root用户)

#vim /etc/profile

追加如下内容：

export JAVA_HOME=/usr/local/jdk1.7.0_05

export PATH=$JAVA_HOME/bin:$ANT_HOME/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export HADOOP_HOME=/home/hadoop/hadoop-1.0.3

export PATH=$PATH:$HADOOP_HOME/bin

8.执行环境设置

#source /etc/profile

9.设置主IP

#vim hadoop-1.0.3/conf/masters

把localhost替换成192.168.1.247

10.设置从IP

#vim hadoop-1.0.3/conf/slaves

把localhost替换成192.168.1.248

11.设置hdfs

#vim hadoop-1.0.3/conf/hdfs-site.xml

增加如下内容：

<configuration>

<property>

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

<value>/home/hadoop/hadoop-1.0.3/name</value>

</property>

<property>

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

<value>/home/hadoop/hadoop-1.0.3/data</value>

</property>

<property>

<name>dfs.replication</name>

<value>3</value>

</property>

</configuration>

12.配置任务

#vim hadoop-1.0.3/conf/mapred-site.xml

增加如下内容：

<configuration>

<property>

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

<value>
192.168.1.247:9001</value>

</property>

<property>

<name>mapred.local.dir</name>

<value>/home/hadoop/hadoop-1.0.3/var</value>

</property>

</configuration>

13.配置核心文件

#vim hadoop-1.0.3/conf/core-site.xml

<configuration>

<property>

<name>
fs.default.name</name>

<value>hdfs://
192.168.1.247:9000</value>

</property>

<property>

<name>fs.checkpoint.period</name>

<value>3600</value>

</property>

<property>

<name>fs.checkpoint.size</name>

<value>
67108864</value>

</property>

<property>

<name>hadoop.tmp.dir</name>

<value>/home/hadoop/hadoop-1.0.3/tmp</value>

</property>

</configuration>

14.实现主从自动登录（单方向）

创建公钥:

#ssh-keygen -t rsa

自己可以ssh：

#cat .ssh/id_rsa.pub >> .ssh/authorized_keys

设置文件权限：

#chmod 700 .ssh/authorized_keys

测试一下，不需要密码就表示成功

#ssh localhost

#exit

二、从服务器设置

1.创建用户

#useradd hadoop

2.设置密码

#passwd hadoop

3.编辑系统环境变量(使用root用户)

#vim /etc/profile

追加如下内容：

export JAVA_HOME=/usr/local/jdk1.7.0_05

export PATH=$JAVA_HOME/bin:$ANT_HOME/bin:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export HADOOP_HOME=/home/hadoop/hadoop-1.0.3

export PATH=$PATH:$HADOOP_HOME/bin

4.执行环境设置

#source /etc/profile

5.解压缩hadoop压缩包

#tar zxvf hadoop-1.0.3.tar.gz

6.设置目录权限

#chown -R hadoop.hadoop hadoop-1.0.3

三、回到主服务器

1.切换hadoop用户

#su - hadoop

2.复制公私到从服务器

#ssh-copy-id -i .ssh/id_rsa.pub
hadoop@192.168.1.248

3.测试

#ssh 192.168.1.248

配置正确的话是不需要密码就能登录的

4.向从服务器发送配置文件

#scp -r hadoop-1.0.3/conf hadoop@192.168.1.248:/home/hadoop/hadoop-1.0.3

5.格式化分布式文件系统

#hadoop-1.0.3/bin/hadoop namenode -format

6.启动hadoop服务

#hadoop-1.0.3/bin/start-dfs.sh

#hadoop-1.0.3/bin/start-mapred.sh

7.查看运行情况

web查询界面：
http://192.168.1.247:50030

四、安装hive(主服务器)

1.压缩包装包(hadoop用户)

#tar zxvf hive-0.9.0.tar.gz

#mv hive-0.9.0 hadoop-1.0.3

2.配置hive环境变量

#cp hadoop-1.0.3/hive-0.9.0/conf/hive-env.sh.template hadoop-1.0.3/hive-0.9.0/conf/hive-env.sh

#vim hadoop-1.0.3/hive-0.9.0/conf/hive-env.sh

增加一行：

HADOOP_HOME=$HADOOP_HOME

3.配置hive元数据保存到mysql

建立数据数用户，数据库使用latin1字符集：

mysql>CREATE DATABASE hive CHARACTER SET latin1;

mysql>GRANT ALL PRIVILEGES ON hive.* TO 'hive'@'%' IDENTIFIED BY 'hivepasswd';

修改配置文件：

#cp hadoop-1.0.3/hive-0.9.0/conf/hive-default.xml.template hadoop-1.0.3/hive-0.9.0/conf/hive-site.xml

#vim hadoop-1.0.3/hive-0.9.0/conf/hive-site.xml

修改四个地方：

<property>

<name>javax.jdo.option.ConnectionURL</name>

<value>jdbc:mysql://
192.168.1.247:3306/hive?createDatabaseIfNotExist=true</value>

<description>JDBC connect string for a JDBC metastore</description>

</property>

<property>

<name>javax.jdo.option.ConnectionDriverName</name>

<value>com.mysql.jdbc.Driver</value>

<description>Driver class name for a JDBC metastore</description>

</property>

<property>

<name>javax.jdo.option.ConnectionUserName</name>

<value>hive</value>

<description>username to use against metastore database</description>

</property>

<property>

<name>javax.jdo.option.ConnectionPassword</name>

<value>hivepasswd</value>

<description>password to use against metastore database</description>

</property>

5.复制mysql连接库包

#cp mysql-connector-java-5.1.11-bin.jar hadoop-1.0.3/hive-0.9.0/lib

4.启动hive

#hadoop-1.0.3/hive-0.9.0/bin/hive

5.去掉log4j过期警告

#cp hadoop-1.0.3/hive-0.9.0/conf/hive-log4j.properties.template hadoop-1.0.3/hive-0.9.0/conf/hive-log4j.properties

#vim hadoop-1.0.3/hive-0.9.0/conf/hive-log4j.properties

找到“log4j.appender.EventCounter”将他的值变更为：“org.apache.hadoop.log.metrics.EventCounter”

五、安装php访问hive数据库插件

1.解压缩thrift包

#tar zxvf thrift-0.8.0.tar.gz

2.不要ruby支持否则会报错

#cd thrift-0.8.0

#./configure --without-ruby

#make && make install

3.后台启动hive

#hadoop-1.0.3/hive-0.9.0/bin/hive --service hiveserver>/dev/null 2>&1 &

4.准备Thrifht库包放在/home/hadoop目录下，这个包可以在网上下载

5.编写php程序

[php]
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<?

//php连接hive thrift依赖包路径

$GLOBALS['THRIFT_ROOT'] = '/home/hadoop/Thrift/';

//load the required files for connecting to Hive

require_once $GLOBALS['THRIFT_ROOT'] . 'packages/hive_service/ThriftHive.php';

require_once $GLOBALS['THRIFT_ROOT'] . 'transport/TSocket.php';

require_once $GLOBALS['THRIFT_ROOT'] . 'protocol/TBinaryProtocol.php';

//Set up the transport/protocol/client

$transport = new TSocket('192.168.1.247', 10000);

$protocol = new TBinaryProtocol($transport);

$client = new ThriftHiveClient($protocol);

$transport->open();

//run queries, metadata calls etc

$client->execute('show tables');

var_dump($client->fetchAll());

$transport->close();

?>