[Hadoop] Install Hadoop as Standalone in CentOS 7

1. Install RSync

#> yum -y install rsync

2. Download Hadoop

http://hadoop.apache.org/releases.html

#> cd /usr/local
#> wget http://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-2.8.1/hadoop-2.8.1.tar.gz

3. Unzip Hadoop file

#> tar zxf hadoop-2.8.1.tar.gz

4. Setup environment variables

#> cd /usr/local/hadoop-2.8.1/etc/hadoop
#> vi hadoop-env.sh

#> vi ~/.bash_profile

5. Configure core-site.xml file

#> cd /usr/local/hadoop-2.8.1/etc/hadoop
#> vi core-site.xml

6. Configure hdfs-site.xml

#> cd /usr/local/hadoop-2.8.1/etc/hadoop
#> vi hdfs-site.xml

7. Create SSH key

#> ssh-keygen -t rsa
#> cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys

8. Test SSH

#> ssh localhost

9. Format NameNode

#> hadoop namenode -format

10. Startup Hadoop

#> start-all.sh

11. Connect on Web browser

http://hadoophost:50070