hadoop 开发环境搭建

一，安装java环境

添加java环境变量

vi /etc/profile

# add by tank
export JAVA_HOME=/data/soft/jdk/jdk1.7.0_71
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin

二，修改文件句柄数

vi  /etc/security/limits.conf

# add by tank

* soft nofile 65536
* hard nofile  65536

三，设置ssh无密码登录

参考：http://www.cnblogs.com/tankaixiong/p/4172942.html

四，安装hadoop 环境

这里用的是hadoop2.20版本

目录结构：

修改配置文件：

[[email protected] hadoop]$ vi 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

http://www.apache.org/licenses/LICENSE-2.0

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.default.name</name>
     <value>hdfs://192.168.149.128:9000</value>
  </property>
</configuration>

[[email protected] hadoop]$ vi 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

http://www.apache.org/licenses/LICENSE-2.0

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.replication</name>
    <value>1</value>
  </property>
  <property>
      <name>dfs.namenode.name.dir</name>
      <value>file:/data/soft/hadoop/hadoop-2.2.0/hdfs/name</value>
        <final>true</final>
   </property>
   <property>
        <name>dfs.datanode.data.dir</name>
        <value>file:/data/soft/hadoop/hadoop-2.2.0/hdfs/data</value>
   </property>
</configuration>

文件必须已经存在

[[email protected] hadoop]$ vi 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

http://www.apache.org/licenses/LICENSE-2.0

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>mapred.job.tracker</name>
     <value>192.168.149.128:9001</value>
   </property>
</configuration>
~
~

注意上面一定要填Ip,不要填localhost，不然eclipse会连接不到！

启动:

sbin/start-all.sh

查看状态：

[[email protected] hadoop-2.2.0]$ jps
5402 NodeManager
24718 Jps
4885 NameNode
5155 SecondaryNameNode

5295 ResourceManager

总共有5个hadoop线程

访问地址查看：

http://192.168.149.128:50070/dfshealth.jsp