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這篇文章主要介紹HDFS之偽分布式集群如何搭建,文中介紹的非常詳細(xì),具有一定的參考價(jià)值,感興趣的小伙伴們一定要看完!
1.安裝前準(zhǔn)備
1.1查看虛擬機(jī)ip [root@localhost ~]# ifconfig
得到hadoop01的ip:192.168.88.155
1.2修改ip映射關(guān)系
[root@localhost ~]# vi /etc/hosts
在里面添加如下記錄,保存退出
192.168.88.155 hadoop01
1.3關(guān)閉防火墻
查看防護(hù)墻狀態(tài)service iptables status
關(guān)閉service iptables stop
查看防火墻開(kāi)機(jī)啟動(dòng)狀態(tài) chkconfig iptables --list
關(guān)閉開(kāi)機(jī)啟動(dòng) chkconfig iptables off
1.4安裝JDK1.7參看另一篇文章
查看是否安裝成功[root@localhost ~]# java -version
java version "1.7.0_79"
Java(TM) SE Runtime Environment (build 1.7.0_79-b15)
Java HotSpot(TM) Client VM (build 24.79-b02, mixed mode)
出現(xiàn)以上信息表示安裝成功
2.配置hadoop
2.1下載hadoop包
[root@localhost ~]# wget http://apache.fayea.com/hadoop/common/hadoop-1.2.1/hadoop-1.2.1.tar.gz
2.2解壓
[root@localhost ~]# tar -zxvf hadoop-1.1.2.tar.gz -C /cloud/
2.3配置hadoop偽分布式(要修改4個(gè)文件)
第一個(gè):hadoop-env.sh
[root@localhost cloud]# cd /cloud/hadoop-1.2.1/conf/
添加下面的字段export JAVA_HOME=/usr/lib/java/java-7-sun
第二個(gè):core-site.xml
vim core-site.xml
<configuration>
<!-- destine HDFS's namenode address -->
<property>
<name>fs.default.name</name>
<value>hdfs://hadoop01:9000</value>
</property>
<!-- destine hadoop store directory when run the programe -->
<property>
<name>hadoop.tmp.dir</name>
<value>/cloud/hadoop-1.2.1/tmp</value>
</property>
</configuration>
第三個(gè):hdfs-site.xml
vim hdfs-site.xml
<configuration>
<!-- configurate amout about HDFS fuben-->
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
</configuration>
第四個(gè):mapred-site.xml
vim mapred-site.xml
<configuration>
<!-- 指定jobtracker地址 -->
<property>
<name>mapred.job.tracker</name>
<value>hadoop01:9001</value>
</property>
</configuration>
2.4將hadoop添加到環(huán)境變量
vim /etc/profile
export JAVA_HOME=/usr/lib/java/java-7-sun
export HADOOP_HOME=/cloud/hadoop-1.1.2
export PATH=$PATH:$JAVA_HOME/bin:$HADOOP_HOME/bin
source /etc/profile
2.5格式化HDFS
[root@localhost conf]# cd ../
[root@localhost hadoop-1.2.1]# cd bin
[root@localhost bin]# ./hadoop namenode -format
2.6啟動(dòng)hadoop
[root@localhost bin]# sh start-all.sh
2.7驗(yàn)證集群是否啟動(dòng)成功
2.7.1利用jps
[root@localhost sbin]# jps
12152 JobTracker
13835 Jps
11952 DataNode
12298 TaskTracker
11815 NameNode
12080 SecondaryNameNode
2.7.2利用netstat
[root@localhost sbin]# netstat -nltp
jpsActive Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 3605/portmap
tcp 0 0 0.0.0.0:851 0.0.0.0:* LISTEN 3637/rpc.statd
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN 3857/cupsd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 3964/sendmail: acce
tcp 0 0 :::50020 :::* LISTEN 11952/java
tcp 0 0 :::46087 :::* LISTEN 12080/java
tcp 0 0 ::ffff:192.168.88.155:9000 :::* LISTEN 11815/java
tcp 0 0 ::ffff:192.168.88.155:9001 :::* LISTEN 12152/java
tcp 0 0 :::50090 :::* LISTEN 12080/java
tcp 0 0 :::50060 :::* LISTEN 12298/java
tcp 0 0 :::50030 :::* LISTEN 12152/java
tcp 0 0 :::42256 :::* LISTEN 12152/java
tcp 0 0 ::ffff:127.0.0.1:42194 :::* LISTEN 12298/java
tcp 0 0 :::50070 :::* LISTEN 11815/java
tcp 0 0 :::48758 :::* LISTEN 11815/java
tcp 0 0 :::22 :::* LISTEN 3848/sshd
tcp 0 0 :::50010 :::* LISTEN 11952/java
tcp 0 0 :::50075 :::* LISTEN 11952/java
tcp 0 0 :::51163 :::* LISTEN 11952/java
還可以通過(guò)瀏覽器的方式驗(yàn)證
http://192.168.1.110:50070 (hdfs管理界面)
http://192.168.1.110:50030 (mr管理界面)
在這個(gè)文件中添加linux主機(jī)名和IP的映射關(guān)系
C:\Windows\System32\drivers\etc
3.配置ssh免登陸
生成ssh免登陸密鑰
ssh-keygen -t rsa
執(zhí)行完這個(gè)命令后,會(huì)生成兩個(gè)文件id_rsa(私鑰)、id_rsa.pub(公鑰)
將公鑰拷貝到要免登陸的機(jī)器上
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
4.配置ssh免登陸
生成ssh免登陸密鑰
cd ~,進(jìn)入到我的home目錄
cd .ssh/
ssh-keygen -t rsa (四個(gè)回車(chē))
執(zhí)行完這個(gè)命令后,會(huì)生成兩個(gè)文件id_rsa(私鑰)、id_rsa.pub(公鑰)
將公鑰拷貝到要免登陸的機(jī)器上
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys(文件)
或
ssh-copy-id -i localhost
補(bǔ)充
(2)修改sshd_config文件
# vi /etc/ssh/sshd_config //開(kāi)啟以下內(nèi)容
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys
service sshd restart
ssh username@serverhost
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