规划：

[hadoop@db01 ~]$ cat /etc/hosts

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4

::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.100.231         db01        #(namenode，datanode,JobHistoryServer,nodemanager)

192.168.100.232         db02        #(resourcemanager,datanode,nodemanager)

192.168.100.233         db03        #(SecondaryNameNode,datanode,nodemanager)

192.168.100.234         db04        #(nodemanager,datanode)

192.168.100.235         db05        #(nodemanager,datanode)

配置文件：

[hadoop@db01 hadoop-2.5.0]$ cat etc/hadoop/core-site.xml

<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!--

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

   

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License. See accompanying LICENSE file.

-->

<!-- Put site-specific property overrides in this file. -->

<configuration>

    <property>

            <name>fs.defaultFS</name>

            <value>hdfs://db01:9000</value>

    </property>

        <property>

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

                <value>/usr/local/hadoop-2.5.0/data/tmp</value>

        </property>

        <property>

                <name>fs.trash.interval</name>

                <value>7000</value>

        </property>

</configuration>

[hadoop@db01 hadoop-2.5.0]$ cat etc/hadoop/hdfs-site.xml

<?xml version="1.0" encoding="UTF-8"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!--

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

   

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License. See accompanying LICENSE file.

-->

<!-- Put site-specific property overrides in this file. -->

<configuration>

        <property>

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

                <value>db03:50090</value>

        </property>

</configuration>

[hadoop@db01 hadoop-2.5.0]$ cat etc/hadoop/yarn-site.xml

<?xml version="1.0"?>

<!--

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

   

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License. See accompanying LICENSE file.

-->

<configuration>

    <property>

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

                <value>mapreduce_shuffle</value>

    </property>

        <property>

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

                <value>db02</value>

        </property>

    <property>

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

                <value>true</value>

        </property>

        <property>

                <name>yarn.log-aggregation.retain-seconds</name>

                <value>600000</value>

        </property>

</configuration>

[hadoop@db01 hadoop-2.5.0]$ cat etc/hadoop/mapred-site.xml

<?xml version="1.0"?>

<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>

<!--

  Licensed under the Apache License, Version 2.0 (the "License");

  you may not use this file except in compliance with the License.

  You may obtain a copy of the License at

   

  Unless required by applicable law or agreed to in writing, software

  distributed under the License is distributed on an "AS IS" BASIS,

  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

  See the License for the specific language governing permissions and

  limitations under the License. See accompanying LICENSE file.

-->

<!-- Put site-specific property overrides in this file. -->

<configuration>

    <property>

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

                <value>yarn</value>

    </property>

        <property>

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

                <value>db01:10020</value>

        </property>

        <property>

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

                <value>db01:19888</value>

        </property>

</configuration>

[hadoop@db01 hadoop-2.5.0]$ cat etc/hadoop/slaves

db01

db02

db03

db04

db05

并且在(etc/hadoop/hadoop-env.sh  etc/hadoop/mapred-env.sh  etc/hadoop/yarn-env.sh)文件中配置相应的JAVA_HOME信息。