Hadoop伪分布式安装

卸载JDK：

[root@localhost mzsx]# rpm -qa | grep java
java-1.6.0-openjdk-1.6.0.0-1.45.1.11.1.el6.x86_64
tzdata-java-2012c-1.el6.noarch
[root@localhost mzsx]# rpm -e --nodeps tzdata-java-2012c-1.el6.noarch
[root@localhost mzsx]# rpm -e --nodeps  java-1.6.0-openjdk-1.6.0.0-1.45.1.11.1.el6.x86_64

安装JDK：

[root@localhost mzsx]# chmod 777 jdk-7u45-linux-x64.rpm
[root@localhost mzsx]# rpm -ivh jdk-7u45-linux-x64.rpm
Preparing...                ########################################### [100%]
   1:jdk                    ########################################### [100%]
Unpacking JAR files...
    rt.jar...
    jsse.jar...
    charsets.jar...
    tools.jar...
    localedata.jar...
    jfxrt.jar...

配置JDK环境：

[root@srv-dfh526 bin]#vim  /etc/profile
export JAVA_HOME=/usr/local/jdk
export JAVA_BIN=/usr/local/jdk/bin
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export HADOOP_HOME=/usr/local/hadoop
export PATH=/usr/local/hadoop/bin:$PATH
export HADOOP_HOME_WARN_SUPPRESS=1
[root@srv-dfh526 bin]#source /etc/profile

关闭防火墙的方法为：

. 永久性生效
开启：chkconfig iptables on
关闭：chkconfig iptables off
[root@localhost ~]# service network restart
关闭环回接口：                                             [确定]
弹出环回接口：                                             [确定]
[root@localhost ~]#

免密钥登录，注：一直回车

[root@localhost jdk1.7.0_45]# cd /root/
[root@localhost ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
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:
51:19:ce:ed:ae:f1:57:d4:30:c8:a2:a3:d7:8d:e1:2d root@localhost
The key‘s randomart image is:
+--[ RSA 2048]----+
|          o+ .   |
|         +o.o o  |
|        ..o..  o.|
|        o...    o|
|       .S+ =.  . |
|      . . E.o   .|
|       .  ...  . |
|           +  .  |
|          . ..   |
+-----------------+
[root@localhost ~]# cd .ssh
[root@localhost .ssh]# ll -a
总用量 16
drwx------.  2 root root 4096 11月  8 03:07 .
dr-xr-x---. 26 root root 4096 11月  8 03:03 ..
-rw-------.  1 root root 1675 11月  8 03:07 id_rsa
-rw-r--r--.  1 root root  408 11月  8 03:07 id_rsa.pub
[root@localhost .ssh]# cp id_rsa.pub authorized_keys
[root@localhost .ssh]# serv
servertool   service      serviceconf 
[root@localhost .ssh]# serv
servertool   service      serviceconf 
[root@localhost .ssh]# service sshd restart
停止 sshd：                                                [确定]
正在启动 sshd：                                            [确定]
[root@localhost .ssh]#

HADOOP配置：

core-site.xml

<configuration>
    <property>
        <name>hadoop.tem.dir</name>
        <value>/home/hadoop/tem</value>
    </property>
    <property>
        <name>fs.default.name</name>
        <value>hdfs://192.168.197.131:9000</value>
    </property>
</configuration>

hdfs-site.xml

<configuration>
    <property>
        <name>dfs.data.dir</name>
        <value>/home/hadoop/data</value>
    </property>
    <property>
        <name>dfs.replication</name>
        <value>1</value>
    </property>
    <property>
        <name>dfs.permissions</name>
        <value>false</value>
    </property>
</configuration>

mapred-site.xml

<configuration>
    <property>
        <name>mapred.job.tracker</name>
        <value>192.168.197.131:9001</value>
    </property>
</configuration>

hadoop-env.sh

# export JAVA_HOME=/usr/lib/j2sdk1.5-sun
export JAVA_HOME=/usr/local/jdk

格式化分布式文件系统

[root@localhost bin]# ./hadoop namenode -format
Warning: $HADOOP_HOME is deprecated.
13/11/08 03:30:03 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = localhost.localdomain/127.0.0.1
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 1.2.0
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2 -r 1479473; compiled by ‘hortonfo‘ on Mon May  6 06:59:37 UTC 2013
STARTUP_MSG:   java = 1.7.0_45
************************************************************/
13/11/08 03:30:03 INFO util.GSet: Computing capacity for map BlocksMap
13/11/08 03:30:03 INFO util.GSet: VM type       = 64-bit
13/11/08 03:30:03 INFO util.GSet: 2.0% max memory = 1013645312
13/11/08 03:30:03 INFO util.GSet: capacity      = 2^21 = 2097152 entries
13/11/08 03:30:03 INFO util.GSet: recommended=2097152, actual=2097152
13/11/08 03:30:03 INFO namenode.FSNamesystem: fsOwner=root
13/11/08 03:30:04 INFO namenode.FSNamesystem: supergroup=supergroup
13/11/08 03:30:04 INFO namenode.FSNamesystem: isPermissionEnabled=true
13/11/08 03:30:04 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100
13/11/08 03:30:04 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
13/11/08 03:30:04 INFO namenode.FSEditLog: dfs.namenode.edits.toleration.length = 0
13/11/08 03:30:04 INFO namenode.NameNode: Caching file names occuring more than 10 times
13/11/08 03:30:04 INFO common.Storage: Image file of size 110 saved in 0 seconds.
13/11/08 03:30:04 INFO namenode.FSEditLog: closing edit log: position=4, editlog=/tmp/hadoop-root/dfs/name/current/edits
13/11/08 03:30:04 INFO namenode.FSEditLog: close success: truncate to 4, editlog=/tmp/hadoop-root/dfs/name/current/edits
13/11/08 03:30:04 INFO common.Storage: Storage directory /tmp/hadoop-root/dfs/name has been successfully formatted.
13/11/08 03:30:04 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at localhost.localdomain/127.0.0.1
************************************************************/

启动Hadoop

[root@hadoop bin]# ./start-all.sh
starting namenode, logging to /home/mzsx/hadoop-0.20.2/bin/../logs/hadoop-root-namenode-hadoop.out
The authenticity of host ‘localhost (::1)‘ can‘t be established.
RSA key fingerprint is 0f:68:b7:e0:2d:13:38:4b:44:ac:ec:a3:7f:b8:f6:7e.
Are you sure you want to continue connecting (yes/no)? yes
localhost: Warning: Permanently added ‘localhost‘ (RSA) to the list of known hosts.
localhost: starting datanode, logging to /home/mzsx/hadoop-0.20.2/bin/../logs/hadoop-root-datanode-hadoop.out
localhost: starting secondarynamenode, logging to /home/mzsx/hadoop-0.20.2/bin/../logs/hadoop-root-secondarynamenode-hadoop.out
starting jobtracker, logging to /home/mzsx/hadoop-0.20.2/bin/../logs/hadoop-root-jobtracker-hadoop.out
localhost: starting tasktracker, logging to /home/mzsx/hadoop-0.20.2/bin/../logs/hadoop-root-tasktracker-hadoop.out

查看与Java相关的线程信息

[root@srv-dfh526 bin]# jps
14828 DataNode
15600 Bootstrap
23062 Bootstrap
15232 TaskTracker
18636 Jps
2935 Bootstrap
14982 SecondaryNameNode
23445 Bootstrap
14652 NameNode
15080 JobTracker

fs操作

查看目录和文件
[root@srv-dfh526 bin]# ./hadoop fs -lsr /
drwxr-xr-x   - root supergroup          0 2014-04-23 17:57 /tmp
drwxr-xr-x   - root supergroup          0 2014-04-23 17:57 /tmp/hadoop-root
drwxr-xr-x   - root supergroup          0 2014-04-23 18:38 /tmp/hadoop-root/mapred
drwxr-xr-x   - root supergroup          0 2014-04-23 18:38 /tmp/hadoop-root/mapred/staging
drwxr-xr-x   - root supergroup          0 2014-04-23 18:38 /tmp/hadoop-root/mapred/staging/root
drwx------   - root supergroup          0 2014-04-23 18:38 /tmp/hadoop-root/mapred/staging/root/.staging
drwx------   - root supergroup          0 2014-04-23 18:38 /tmp/hadoop-root/mapred/system
-rw-------   1 root supergroup          4 2014-04-23 17:57 /tmp/hadoop-root/mapred/system/jobtracker.info

上传文件
[root@srv-dfh526 bin]# ./hadoop fs -put /home/hadoop/aoman.txt ./

执行wordcount
[root@srv-dfh526 bin]# bin/hadoop jar hadoop-examples-1.2.1.jar  wordcount /user/root/aoman.txt ./in

下载文件

[root@srv-dfh526 bin]# ./hadoop fs -get /user/root/in/part-r-00000 /home/hadoop/wordcount.txt

Hadoop伪分布式安装,布布扣,bubuko.com

Hadoop伪分布式安装

原文：http://qiangmzsx.blog.51cto.com/2052549/1401341