hadoop伪分布式
1、安装虚拟机
VMware workstation
CentOS 镜像
安装Linux虚拟机:(在Win7上)
1)安装VMwareWorkstations(可修改配置)
2)添加CentOS镜像(启动安装 ->配置网络)
网络配置:NAT模式
网络重启:service network restart
关闭系统:shutdown -h now
2、远程连接
Xshell5
Xftp5
3、在Linux上搭建Hadoop集群
下载软件
1. Jdk:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
2. Hadoop包:http://apache.fayea.com/hadoop/common/hadoop-2.7.2/
步骤:
1、修改/etc/hosts
2、配置JDK
安装:rpm -ivh jdk-8u101-linux-x64.rpm
vi /etc/profile
JAVA_HOME
source /etc/profile
java -version
3、配置SSH(免密码登录)
ssh-keygen -t rsa
cat xxx.pub >> authorized_keys
chmod 644 authorized_keys
ssh IP/HOSTNAME
配置环境JAVA_HOME, HADOOP_HOME
JAVA_HOME=/usr/java/default
HADOOP_HOME=/software/hadoop-2.8.0
PATH=$JAVA_HOME/bin:$HADOOP_HOME/bin:$PATH
Linux修改/etc/profile配置错误command is not found自救方法
# export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
执行完以上的命令后,你可以重新执行 source /etc/profile命令来让你的配置文件生效
如果不幸的是你的profile配置文件没有备份,在直接使用vi命令无法使用的情况下,你可以在vi前面加上命令的地址
#/bin/vi /etc/profile
虚拟机:/bin/vi 修改完profile ,直接重启虚拟机也可以
4、安装及配置Hadoop
tar zxf hadoop-2.7.2.tar.gz
cd /opt/hadoop-2.7.2/etc/hadoop/
core-site.xml
<property>
<name>fs.default.name</name>
<value>hdfs://bigdata:9000</value>
</property>
<property>
<name>hadoop.tmp.dir</name>
<value>/software/hadoop-2.8.0/current/tmp</value>
</property>
<property>
<name>fs.trash.interval</name>
<value>4320</value>
</property>
mkdir -p /software/hadoop-2.8.0/current/tmp
hdfs-site.xml
<property>
<name>dfs.namenode.name.dir</name>
<value>/software/hadoop-2.8.0/current/dfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>/software/hadoop-2.8.0/current/data</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.webhdfs.enabled</name>
<value>true</value>
</property>
<property>
<name>dfs.permissions.superusergroup</name>
<value>staff</value>
</property>
<property>
<name>dfs.permissions.enabled</name>
<value>false</value>
</property>
[root@bigdata hadoop]# mkdir -p /software/hadoop-2.8.0/current/dfs/name
[root@bigdata hadoop]# mkdir -p /software/hadoop-2.8.0/current/data
yarn-site.xml
<property>
<name>yarn.resourcemanager.hostname</name>
<value>bigdata</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
<value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
<property>
<name>yarn.resourcemanager.address</name>
<value>bigdata:18040</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.address</name>
<value>bigdata:18030</value>
</property>
<property>
<name>yarn.resourcemanager.resource-tracker.address</name>
<value>bigdata:18025</value>
</property> <property>
<name>yarn.resourcemanager.admin.address</name>
<value>bigdata:18141</