Hadoop-1.Centos6.4安装伪分布式Hadoop
2016-12-21 16:28
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1.hadoop的伪分布安装
1.1 设置ip地址
执行命令 service network restart
验证: ifconfig
1.2 关闭防火墙
执行命令 service iptables stop
验证: service iptables status
1.3 关闭防火墙的自动运行
执行命令 chkconfig iptables off// 永久生效
验证: chkconfig --list | grep iptables
1.4 设置主机名
执行命令 (1)hostname hang// 重启失效
(2)vi /etc/sysconfig/network// 永久生效
1.5 ip与hostname绑定
执行命令 vi /etc/hosts
>> 192.168.191.6 hang
验证: ping hang
1.6 设置ssh免密码登陆
执行命令 (1)ssh-keygen -t rsa
(2)cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys
验证: ssh hang
1.7 安装jdk
执行命令 (1)cd /usr/local
(2)chmod u+x jdk-6u24-linux-i586.bin
(3)./jdk-6u24-linux-i586.bin
(4)mv jdk-1.6.0_24 jdk
(5)vi /etc/profile 增加内容如下:
export JAVA_HOME=/usr/local/jdk
export PATH=.:$JAVA_HOME/bin:$PATH
(6)source /etc/profile
验证: java -version
1.8 安装hadoop
执行命令 (1)tar -zxvf hadoop-1.1.2.tar.gz
(2)mv hadoop-1.1.2 hadoop
(3)vi /etc/profile 增加内容如下:
export JAVA_HOME=/usr/local/jdk
export HADOOP_HOME=/usr/local/hadoop
export PATH=.:$HADOOP_HOME/bin:$JAVA_HOME/bin:$PATH
(4)source /etc/profile
(5)修改conf目录下的配置文件
hadoop-env.sh、core-site.xml、hdfs-site.xml、mapred-site.xml
1.hadoop-env.sh
export JAVA_HOME=/usr/local/jdk/
2.core-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://hang:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/usr/local/hadoop/tmp</value>
</property>
</configuration>
3.hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
</configuration>
4.mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>hang:9001</value>
</property>
</configuration>
(6)存储和计算: hadoop namenode -format
(7)start-all.sh
验证: (1)执行命令jps 如果看到5个新的java进程,分别是NameNode、SecondaryNameNode、DataNode、JobTracker、TaskTracker
(2)在浏览器查看,http://hang:50070 http://hang:50030
1.9 启动时没有NameNode的可能原因:
(1)没有格式化
(2)环境变量设置错误
(3)ip与hostname绑定失败
1.1 设置ip地址
执行命令 service network restart
验证: ifconfig
1.2 关闭防火墙
执行命令 service iptables stop
验证: service iptables status
1.3 关闭防火墙的自动运行
执行命令 chkconfig iptables off// 永久生效
验证: chkconfig --list | grep iptables
1.4 设置主机名
执行命令 (1)hostname hang// 重启失效
(2)vi /etc/sysconfig/network// 永久生效
1.5 ip与hostname绑定
执行命令 vi /etc/hosts
>> 192.168.191.6 hang
验证: ping hang
1.6 设置ssh免密码登陆
执行命令 (1)ssh-keygen -t rsa
(2)cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys
验证: ssh hang
1.7 安装jdk
执行命令 (1)cd /usr/local
(2)chmod u+x jdk-6u24-linux-i586.bin
(3)./jdk-6u24-linux-i586.bin
(4)mv jdk-1.6.0_24 jdk
(5)vi /etc/profile 增加内容如下:
export JAVA_HOME=/usr/local/jdk
export PATH=.:$JAVA_HOME/bin:$PATH
(6)source /etc/profile
验证: java -version
1.8 安装hadoop
执行命令 (1)tar -zxvf hadoop-1.1.2.tar.gz
(2)mv hadoop-1.1.2 hadoop
(3)vi /etc/profile 增加内容如下:
export JAVA_HOME=/usr/local/jdk
export HADOOP_HOME=/usr/local/hadoop
export PATH=.:$HADOOP_HOME/bin:$JAVA_HOME/bin:$PATH
(4)source /etc/profile
(5)修改conf目录下的配置文件
hadoop-env.sh、core-site.xml、hdfs-site.xml、mapred-site.xml
1.hadoop-env.sh
export JAVA_HOME=/usr/local/jdk/
2.core-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://hang:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/usr/local/hadoop/tmp</value>
</property>
</configuration>
3.hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
</configuration>
4.mapred-site.xml
<configuration>
<property>
<name>mapred.job.tracker</name>
<value>hang:9001</value>
</property>
</configuration>
(6)存储和计算: hadoop namenode -format
(7)start-all.sh
验证: (1)执行命令jps 如果看到5个新的java进程,分别是NameNode、SecondaryNameNode、DataNode、JobTracker、TaskTracker
(2)在浏览器查看,http://hang:50070 http://hang:50030
1.9 启动时没有NameNode的可能原因:
(1)没有格式化
(2)环境变量设置错误
(3)ip与hostname绑定失败
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