Hadoop集群配置

刘小小尘

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一,安装java

1，下载java (以下为下载在/work目录下操作)

wgethttp://download.oracle.com/otn-pub/java/jdk/7u2-b13/jdk-7u2-linux-i586.tar.gz

2，解压下载文件并改名

tar-zxvf jdk-7u2-linux-i586.tar.gz

mvjdk1.7.0_02 java

rmjdk-7u2-linux-i586.tar.gz

3，在/etc/profile中加入以下语句：

exportJAVA_HOME=/work/java

exportJRE_HOME=$JAVA_HOME/jre

exportPATH=$PATH:$JAVA_HOME/bin

二，安装hadoop

1，下载hadoop压缩包（下载在/work目录下）

wget http://mirror.bit.edu.cn/apache//hadoop/common/hadoop-1.0.0/hadoop-1.0.0.tar.gz

2，解压压缩包并改名

tar -zxvf hadoop-1.0.0.tar.gz

mv hadoop-1.0.0 hadoop

rm hadoop-1.0.0.tar.gz

3，修改/etc/profile至

exportJAVA_HOME=/work/java

exportJRE_HOME=$JAVA_HOME/jre

exportHADOOP_HOME=/work/hadoop

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

三，配置hadoop

1，配置conf/hadoop-env.sh

export JAVA_HOME=/work/java

export HADOOP_HEAPSIZE=2000

2，配置conf/core-site.xml

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

</property>

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

<value>/work/hadoopneed/tmp</value>

</property>

<name>dfs.hosts.exclude</name>

<value>/work/hadoop/conf/dfs.hosts.exclude</value>

</property>

</configuration>

3，配置hdfs-site.xml

<value>/work/hadoopneed/name</value>

</property>

<value>/work/hadoopneed/data/data</value>

</property>

<name>dfs.replication</name>

</property>

<name>dfs.namenode.handler.count</name>

</property>

<name>dfs.datanode.handler.count</name>

</property>

<name>dfs.datanode.du.reserved</name>

</property>

<name>dfs.block.size</name>

</property>

</configuration>

4，配置mapred-site.xml

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

</property>

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

<value>/work/hadoopneed/mapred/local</value>

</property>

<name>mapred.system.dir</name>

<value>/tmp/hadoop/mapred/system</value>

</property>

<name>mapred.child.java.opts</name>

</property>

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

</property>

<name>mapred.map.tasks</name>

</property>

<name>mapred.tasktracker.map.tasks.maximum</name>

</property>

<name>mapred.reduce.tasks</name>

</property>

<name>mapred.tasktracker.reduce.tasks.maximum</name>

</property>

5，配置masters

da-free-test1

6，配置slaves

da-free-test2

da-free-test3

da-free-test4

四，其他节点的安装

1，将hadoo和java目录拷贝到其他三个节点对应目录下

scp -rhadoop da-free-test2:/work

scp -rhadoop da-free-test3:/work

scp -rhadoop da-free-test4:/work

scp -rjava da-free-test2:/work

scp -rjava da-free-test3:/work

scp -r java da-free-test4:/work

2，修改三个节点的/etc/profile，加入以下语句并执行一遍。

exportJAVA_HOME=/work/java

exportJRE_HOME=$JAVA_HOME/jre

exportHADOOP_HOME=/work/hadoop

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

至此，算是安装完成，之后遇到的都当问题来处理。

六，格式化文件系统

1，遇到问题：

[root@da-free-test1bin]# ./hadoop namenode -format

Warning:$HADOOP_HOME is deprecated.

Error: dlfailure on line 875

Error:failed /work/java/jre/lib/i386/server/libjvm.so, because/work/java/jre/lib/i386/server/libjvm.so: cannot restore segment prot afterreloc: Permission denied

Error: dlfailure on line 875

Error: failed /work/java/jre/lib/i386/server/libjvm.so,because /work/java/jre/lib/i386/server/libjvm.so: cannot restore segment protafter reloc: Permission denied

解决方法：关闭selinux：

修改/etc/selinux/config

SELINUX=disabled

更改其他三个节点，并重启系统。

解决报警

Warning: $HADOOP_HOME is deprecated.

将刚才添加到/etc/profile中的关于$HADOOP_HOME的删除并重新登录。

2，成功格式化

[root@da-free-test1~]# hadoop namenode -format

12/02/0812:01:21 INFO namenode.NameNode: STARTUP_MSG:

/************************************************************

STARTUP_MSG:Starting NameNode

STARTUP_MSG: host = da-free-test1/172.16.18.202

STARTUP_MSG: args = [-format]

STARTUP_MSG: version = 1.0.0

STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.0-r 1214675; compiled by 'hortonfo' on Thu Dec 15 16:36:35 UTC 2011

************************************************************/

12/02/0812:01:21 INFO util.GSet: VM type =32-bit

12/02/0812:01:21 INFO util.GSet: 2% max memory = 35.55625 MB

12/02/0812:01:21 INFO util.GSet: capacity =2^23 = 8388608 entries

12/02/0812:01:21 INFO util.GSet: recommended=8388608, actual=8388608

12/02/0812:01:21 INFO namenode.FSNamesystem: fsOwner=root

12/02/0812:01:21 INFO namenode.FSNamesystem: supergroup=supergroup

12/02/0812:01:21 INFO namenode.FSNamesystem: isPermissionEnabled=true

12/02/0812:01:21 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100

12/02/0812:01:21 INFO namenode.FSNamesystem: isAccessTokenEnabled=falseaccessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)

12/02/0812:01:21 INFO namenode.NameNode: Caching file names occuring more than 10 times

12/02/0812:01:22 INFO common.Storage: Image file of size 110 saved in 0 seconds.

12/02/0812:01:22 INFO common.Storage: Storage directory /work/hadoopneed/name has beensuccessfully formatted.

12/02/0812:01:22 INFO namenode.NameNode: SHUTDOWN_MSG:

/************************************************************

SHUTDOWN_MSG:Shutting down NameNode at da-free-test1/172.16.18.202

************************************************************/

七，启动hadoop

1，启动hadoop日志报错

./start-all.sh

WARN org.apache.hadoop.hdfs.DFSClient: DataStreamerException: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File/tmp/hadoop/mapred/system/jobtracker.info could only be replicated to 0 nodes,instead of 1

解决方法：关闭hadoop安全模式：hadoop dfsadmin -safemode leave（此时并未关闭hadoop）。

等待一会，hadoop自动恢复成功。

观察日志hadoop-root-jobtracker-da-free-test1.log，可以看到：

2012-02-08 12:14:07,804 INFOorg.apache.hadoop.ipc.Server: IPC Server Responder: starting

2012-02-08 12:14:07,804 INFOorg.apache.hadoop.ipc.Server: IPC Server listener on 9001: starting

2012-02-08 12:14:07,805 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 0 on 9001: starting

2012-02-08 12:14:07,805 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 1 on 9001: starting

2012-02-08 12:14:07,805 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 2 on 9001: starting

2012-02-08 12:14:07,805 INFO org.apache.hadoop.ipc.Server:IPC Server handler 3 on 9001: starting

2012-02-08 12:14:07,805 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 4 on 9001: starting

2012-02-08 12:14:07,805 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 5 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 6 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 7 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 8 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 9 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 10 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 11 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 12 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 13 on 9001: starting

2012-02-08 12:14:07,806 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 14 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 15 on 9001: starting

2012-02-08 12:14:07,807 INFO org.apache.hadoop.ipc.Server:IPC Server handler 16 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 17 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 18 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 19 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 20 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 21 on 9001: starting

2012-02-08 12:14:07,807 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 22 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 23 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 25 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 26 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 27 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 28 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.mapred.JobTracker: Starting RUNNING

2012-02-08 12:14:07,808 INFO org.apache.hadoop.ipc.Server:IPC Server handler 29 on 9001: starting

2012-02-08 12:14:07,808 INFOorg.apache.hadoop.ipc.Server: IPC Server handler 24 on 9001: starting

2012-02-08 12:14:12,623 INFOorg.apache.hadoop.net.NetworkTopology: Adding a new node: /default-rack/da-free-test4

2012-02-08 12:14:12,625 INFOorg.apache.hadoop.mapred.JobTracker: Adding trackertracker_da-free-test4:da-free-test1/127.0.0.1:42182 to host da-free-test4

2012-02-08 12:14:12,743 INFOorg.apache.hadoop.net.NetworkTopology: Adding a new node:/default-rack/da-free-test3

2012-02-08 12:14:12,744 INFOorg.apache.hadoop.mapred.JobTracker: Adding trackertracker_da-free-test3:da-free-test1/127.0.0.1:53695 to host da-free-test3

2012-02-08 12:14:12,802 INFOorg.apache.hadoop.net.NetworkTopology: Adding a new node:/default-rack/da-free-test2

2012-02-08 12:14:12,802 INFOorg.apache.hadoop.mapred.JobTracker: Adding trackertracker_da-free-test2:da-free-test1/127.0.0.1:47259 to host da-free-test2

打开浏览器，输入http://172.16.18.202:50030，可以看到节点数量为3。

上传一个文件：dfs -put hadoop-root-namenode-da-free-test1.log /usr/testfile

查看上传的文件：hadoop dfs -ls /usr/

Found 1 items

-rw-r--r--3 root supergroup 845332012-02-08 12:20 /usr/testfile

查看http://172.16.18.202:50070，发现已用空间为396k。

暂时验证通过。

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