hadoop2.6伪分布式配置

软件的安装目录：
/opt/modules/

安装: 
0）说明
SSH本机免登陆密码
ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
1、系统：CentOS 6.4 64位

2、关闭防火墙和SELinux
service iptables status
service iptables stop
chkconfig iptables off


vi /etc/sysconfig/selinux          
设置 SELINUX=disabled


3、设置静态IP地址
vi /etc/sysconfig/network-scripts/ifcfg-eth0

4、修改HostName
hostname hadoop-yarn.dragon.org       
vi /etc/sysconfig/network


5、IP与HostName绑定
vi /etc/hosts
内容：
192.168.48.128 hadoop-yarn.dragon.org hadoop-yarn
6、安装JDK
安装目录：/opt/modules/jdk1.6.0_45
版本：jdk-6u45-linux-x64.bin
命令：
chmod u+x jdk-6u45-linux-x64.bin
./jdk-6u45-linux-x64.bin
设置环境变量：
vi /etc/profile
添加内容：
export JAVA_HOME=/opt/modules/jdk1.6.0_45
export PATH=$PATH:$JAVA_HOME/bin
生效：
# source /etc/profile
##JAVA
export JAVA_HOME=/opt/modules/jdk1.7
export PATH=$PATH:$JAVA_HOME/bin
##HADOOP
export HADOOP_HOME=/opt/modules/hadoop-2.6.0
export PATH=$PATH:/opt/modules/hadoop-2.6.0/sbin:/opt/modules/hadoop-2.6.0/bin


slaves
hadoop-master.dragon.org
1、hadoop-env.sh
export JAVA_HOME=/opt/modules/jdk1.7

2、yarn-env.sh
export JAVA_HOME=/opt/modules/jdk1.7

3、mapred-env.sh
export JAVA_HOME=/opt/modules/jdk1.7

core-site.xml
<property>
<name>hadoop.tmp.dir</name>
<value>/opt/hadoopdata/tmp</value>
</property>
<property>
<name>fs.defaultFS</name>
<value>hdfs://hadoop-master.dragon.org:9000</value>
</property>


hdfs-site.xml
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>/opt/hadoopdata/dfs/name</value>
</property>
<property>
<name>dfs.datannode.data.dir</name>
<value>/opt/hadoopdata/dfs/data</value>
</property>
</configuration>


yarn-site.xml
<configuration>
<property>
<name>yarn.resourcemanager.hostname</name>
<value>hadoop-master.dragon.org</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
<!-- Site specific YARN configuration properties -->
</configuration>


mapred-site.xml
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>


4）启动 start-dfs.sh  start-yarn.sh  mr-jobhistory-daemon.sh   start historyserver
1、启动HDFS 
NameNode、DataNode、SecondaryNameNode
* NameNode 格式化
bin/hdfs namenode -format -- 产生一个Cluster ID

拓展：
* 指定Cluster ID
bin/hdfs namenode -format -clusterid yarn-cluster

* Block Pool ID
数据块池ID

* NameNode Fedaration
* 启动NameNode
sbin/hadoop-daemon.sh start namenode
* 启动DataNode
sbin/hadoop-daemon.sh start datanode
* 启动SecondaryNameNode
sbin/hadoop-daemon.sh start secondarynamenode

2、启动YARN
ResourceManager、NodeManager
* 启动ResourceManger
sbin/yarn-daemon.sh start resourcemanager
* 启动NodeManager
sbin/yarn-daemon.sh start nodemanager