hadoop安装与配置

#生成密钥(node1,node2,node3,node4)
ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
cd ~/.ssh/
ls
#说明
##id_ds 私钥
##is_dsa.pub 公钥
#将公钥文件追加到本地的认证文件中(node1,node2,node3,node4)
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
ssh 192.168.2.136
#Last login: Sun Jul  9 14:14:35 2017 from 192.168.2.136,表示登录成功,并且是不需要输入密码的
exit
#logout 退出
将node1中的公钥复制到node2,node3,node4中
 scp ./id_dsa.pub root@192.168.2.137:/opt/
 scp ./id_dsa.pub root@192.168.2.138:/opt/
 scp ./id_dsa.pub root@192.168.2.139:/opt/
将/opt/id_dsa.pub添加到node2,node3,node4的认证文件中
 cat /opt/id_dsa.pub >> ~/.ssh/authorized_keys

将hadoop压缩包上传到node1的/root目录
tar -zxvf hadoop-2.5.1_x64.tar.gz

mv hadoop-2.5.1 /home/
cd /home/
ls
cd hadoop-2.5.1
ls
cd etc/hadoop

#配置1,修改hadoopenv.sh
vi hadoop-env.sh
#将jdk的安装目录添加到这个文件
export JAVA_HOME=/usr/java/jdk1.7.0_79

#配置2,修改core-site.xml
    vi core-site.xml
		<configuration>
		    <property>
		        <name>fs.defaultFS</name>
		        <value>hdfs://192.168.2.136:9000</value>
		    </property>
		    <property>
		        <name>hadoop.tmp.dir</name>
		        <value>/opt/hadoop-2.5</value>
		    </property>
		</configuration>

	#配置3,修改hdfs-site.xml
		vi hdfs-site.xml
		<configuration>
		    <property>
		        <name>dfs.namenode.secondary.http-address</name>
		        <value>192.168.2.137:50090</value>
		    </property>
		    <property>
		        <name>dfs.namenode.secondary.https-address</name>
		        <value>192.168.2.137:50091</value>
		    </property>
		</configuration>

	#配置4,修改slaves
		vi slaves
		192.168.2.137
		192.168.2.138
		192.168.2.139

	#配置5,修改masters
		vi masters
		192.168.2.137

scp -r hadoop-2.5.1/ root@192.168.2.137:/home/
scp -r hadoop-2.5.1/ root@192.168.2.138:/home/
scp -r hadoop-2.5.1/ root@192.168.2.139:/home/

vi ~/.bash_profile
export HADOOP_HOME=/home/hadoop-2.5.1
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin

scp ~/.bash_profile root@192.168.2.137:/root/
scp ~/.bash_profile root@192.168.2.138:/root/
scp ~/.bash_profile root@192.168.2.139:/root/

source ~/.bash_profile

hdfs namenode -format

cd /opt/hadoop-2.5/dfs/name/current
ls -l

start-dfs.sh
#start-all.sh

service iptables stop

http://192.168.2.136:50070/dfshealth.html#tab-overview