Centos6.X虚拟机配置Hadoop2.6的步骤

1. 通过xmanager的Xftp上传hadoop-2.6.4.tar.gz文件到/opt目录

2. 解压缩hadoop-2.6.4.tar.gz 文件

   tar -zxf hadoop-2.6.4.tar.gz -C /usr/local

解压后即可，看到/usr/local/hadoop-2.6.4文件夹

3. 配置Hadoop

进入目录：

cd /usr/local/hadoop-2.6.4/etc/hadoop/

依次修改下面的文件：

4.1 core-site.xml（在底部Configuration标签内添加以下Configuration标签内的内容，其他文件也是）

<configuration>

<property>

<name>fs.defaultFS</name>

<value>hdfs://master:8020</value>

</property>

<property>

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

<value>/var/log/hadoop/tmp</value>

</property>

</configuration>

4.2 hadoop-env.sh

export JAVA_HOME=/usr/java/jdk1.7.0_80

4.3 hdfs-site.xml

<configuration>

<property>

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

<value>file:///data/hadoop/hdfs/name</value>

</property>

<property>

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

<value>file:///data/hadoop/hdfs/data</value>

</property>

<property>

<name>dfs.namenode.secondary.http-address</name>

<value>master:50090</value>

</property>

<property>

<name>dfs.replication</name>

<value>3</value>

</property>

</configuration>

4.4 mapred-site.xml

复制cp mapred-site.xml.template mapred-site.xml

<configuration>

<property>

<name>mapreduce.framework.name</name>

<value>yarn</value>

</property>

<!-- jobhistory properties -->

<property>

<name>mapreduce.jobhistory.address</name>

<value>master:10020</value>

</property>

<property>

<name>mapreduce.jobhistory.webapp.address</name>

<value>master:19888</value>

</property>

</configuration>

4.5 yarn-site.xml

<configuration>

<property>

<name>yarn.resourcemanager.hostname</name>

<value>master</value>

</property>

<property>

<name>yarn.resourcemanager.address</name>

<value>${yarn.resourcemanager.hostname}:8032</value>

</property>

<property>

<name>yarn.resourcemanager.scheduler.address</name>

<value>${yarn.resourcemanager.hostname}:8030</value>

</property>

<property>

<name>yarn.resourcemanager.webapp.address</name>

<value>${yarn.resourcemanager.hostname}:8088</value>

</property>

<property>

<name>yarn.resourcemanager.webapp.https.address</name>

<value>${yarn.resourcemanager.hostname}:8090</value>

</property>

<property>

<name>yarn.resourcemanager.resource-tracker.address</name>

<value>${yarn.resourcemanager.hostname}:8031</value>

</property>

<property>

<name>yarn.resourcemanager.admin.address</name>

<value>${yarn.resourcemanager.hostname}:8033</value>

</property>

<property>

<name>yarn.nodemanager.local-dirs</name>

<value>/data/hadoop/yarn/local</value>

</property>

<property>

<name>yarn.log-aggregation-enable</name>

<value>true</value>

</property>

<property>

<name>yarn.nodemanager.remote-app-log-dir</name>

<value>/data/tmp/logs</value>

</property>

<property>

<name>yarn.log.server.url</name>

<value>http://master:19888/jobhistory/logs/</value>

<description>URL for job history server</description>

</property>

<property>

<name>yarn.nodemanager.vmem-check-enabled</name>

<value>false</value>

</property>

<property>

<name>yarn.nodemanager.aux-services</name>

<value>mapreduce_shuffle</value>

</property>

<property>

<name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>

<value>org.apache.hadoop.mapred.ShuffleHandler</value>

</property>

<property>

<name>yarn.nodemanager.resource.memory-mb</name>

<value>2048</value>

</property>

<property>

<name>yarn.scheduler.minimum-allocation-mb</name>

<value>512</value>

</property>

<property>

<name>yarn.scheduler.maximum-allocation-mb</name>

<value>4096</value>

</property>

<property>

<name>mapreduce.map.memory.mb</name>

<value>2048</value>

</property>

<property>

<name>mapreduce.reduce.memory.mb</name>

<value>2048</value>

</property>

<property>

<name>yarn.nodemanager.resource.cpu-vcores</name>

<value>1</value>

</property>

</configuration>

4.6 yarn-env.sh

export JAVA_HOME=/usr/java/jdk1.7.0_80

4.7 slaves

删除localhost，添加：

slave1

slave2

slave3

4.8 设置IP映射

编辑各节点/etc/hosts

添加：

192.168.128.130 master master.centos.com

192.168.128.131 slave1 slave1.centos.com

192.168.128.132 slave2 slave2.centos.com

192.168.128.133 slave3 slave3.centos.com

4.9 克隆虚拟机，如果在配置前已提前克隆，则需拷贝hadoop安装文件到集群slave节点

scp -r /usr/local/hadoop-2.6.4 slave1:/usr/local

scp -r /usr/local/hadoop-2.6.4 slave2:/usr/local

scp -r /usr/local/hadoop-2.6.4 slave3:/usr/local

5.配置SSH无密码登录

（1）使用ssh-keygen产生公钥与私钥对。

输入命令“ssh-keygen -t rsa”，接着按三次Enter键

[root@master ~]# ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa):

Created directory '/root/.ssh'.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /root/.ssh/id_rsa.

Your public key has been saved in /root/.ssh/id_rsa.pub.

The key fingerprint is:

a6:13:5a:7b:54:eb:77:58:bd:56:ef:d0:64:90:66:d4 root@master.centos.com

The key's randomart image is:

+--[ RSA 2048]----+

| .. |

| . .E|

| . = |

| . . o o |

| o S . . =|

| o * . o ++|

| . + . . o ooo|

| o . ..o |

| .|

+-----------------+

生成私有密钥id_rsa和公有密钥id_rsa.pub两个文件。

（2）用ssh-copy-id将公钥复制到远程机器中

ssh-copy-id -i /root/.ssh/id_rsa.pub master//依次输入yes,123456（root用户的密码）

ssh-copy-id -i /root/.ssh/id_rsa.pub slave1

ssh-copy-id -i /root/.ssh/id_rsa.pub slave2

ssh-copy-id -i /root/.ssh/id_rsa.pub slave3

（3）验证是否设置无密码登录

依次输入

ssh slave1

ssh slave2

ssh slave3

6.配置时间同步服务

（1）安装NTP服务。在各节点：

yum -y install ntp

（2）设置master节点为NTP服务主节点，

使用命令“vim /etc/ntp.conf”打开/etc/ntp.conf文件，注释掉以server开头的行，并添加:

restrict 192.168.0.0 mask 255.255.255.0 nomodify notrap

server 127.127.1.0

fudge 127.127.1.0 stratum 10

（3）在所有slave节点中配置NTP，同样修改/etc/ntp.conf文件，注释掉server开头的行，并添加:

server master

（4）执行命令“service iptables stop & chkconfig iptables off”永久性关闭防火墙，主节点和从节点都要关闭。

（5）启动NTP服务。

① 在master节点执行命令“service ntpd start & chkconfig ntpd on”

② 在slave1、slave2、slave3上执行命令“ntpdate master”即可同步时间

③ 在slave1、slave2、slave3上分别执行“service ntpd start & chkconfig ntpd on”即可启动并永久启动NTP服务。

7.在/etc/profile添加JAVA_HOME和Hadoop路径

export HADOOP_HOME=/usr/local/hadoop-2.6.4

export JAVA_HOME=/usr/java/jdk1.7.0_80

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

source /etc/profile使修改生效

8. 格式化NameNode

   进入目录

   cd /usr/local/hadoop-2.6.4/bin

执行格式化

./hdfs namenode -format

9.启动集群

进入目录

cd /usr/local/hadoop-2.6.4/sbin

执行启动：

./start-dfs.sh

./start-yarn.sh

./mr-jobhistory-daemon.sh start historyserver

使用jps，查看进程

[root@master sbin]# jps

1765 NameNode

1929 SecondaryNameNode

2378 JobHistoryServer

2412 Jps

2077 ResourceManager

[root@slave1 ~]# jps

1844 Jps

1612 DataNode

1711 NodeManager

10. 关闭防火墙（在所有节点执行）：

    service iptables stop

    chkconfig iptables off

11.在Windows下C:\Windows\System32\drivers\etc\hosts添加IP映射

192.168.128.130 master master.centos.com

192.168.128.131 slave1 slave1.centos.com

192.168.128.132 slave2 slave2.centos.com

192.168.128.133 slave3 slave3.centos.com

12. 浏览器查看：

http://master:50070

http://master:8088