hadoop安装与配置

1.检查JDK版本

2.时间同步

3.设置免密码登录

#生成密钥(node1,node2,node3,node4)ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsacd ~/.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_keysssh 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

4.设置node1为NameNode,node2,node3,node4为datanode

将hadoop压缩包上传到node1的/root目录tar -zxvf hadoop-2.5.1_x64.tar.gzmv hadoop-2.5.1 /home/cd /home/lscd hadoop-2.5.1lscd etc/hadoop#配置1,修改hadoopenv.shvi 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                                                            fs.defaultFS                        hdfs://192.168.2.136:9000                                                                hadoop.tmp.dir                        /opt/hadoop-2.5                                            #配置3,修改hdfs-site.xml                vi hdfs-site.xml                                                            dfs.namenode.secondary.http-address                        192.168.2.137:50090                                                                dfs.namenode.secondary.https-address                        192.168.2.137:50091                                            #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

5.复制文件

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/

6.配置hadoop环境变量

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

7.复制文件

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/

8.重新加载~/.bash_profile

source ~/.bash_profile

9.格式化hdf文件系统,只能在NameNode(node1)上使用

hdfs namenode -format

10.查看生成文件fsp_w_picpath

cd /opt/hadoop-2.5/dfs/name/currentls -l

11.启动节点

start-dfs.sh#start-all.sh

12.关闭防火墙

service iptables stop

13.监控页面进行访问

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

14.说明:保证/etc/hosts下的配置正确