Apache HBase - Pseudo-distributed (Part II)

                Pseudo-distributed mode means that HBase still runs completely on a single host, but each HBase daemon (HMaster, HRegionServer, and ZooKeeper) runs as a separate process

Prepare HDFS and permission of directory

hadoop@45883500b170:~/hadoop-2.7.3$ bin/hdfs dfs -mkdir /user/hbase
hadoop@45883500b170:~/hadoop-2.7.3/bin$ ./hdfs dfs -chown -R hbase:hbase /user/hbase
hadoop@45883500b170:~/hadoop-2.7.3/bin$ ./hdfs dfs -ls /user      
Found 2 items
drwxr-xr-x   - hadoop supergroup          0 2016-08-28 12:27 /user/hadoop
drwxr-xr-x   - hbase  hbase               0 2016-08-29 06:20 /user/hbase

Re-configuration HBase

hbase-site.xml:

<configuration>
  <property>
    <name>hbase.rootdir</name>
    <!-- value>file:///home/hbase/hbase-1.2.2</value -->
    <value>hdfs://localhost:9000/user/hbase</value>
  </property>
  <property>
    <name>hbase.zookeeper.property.dataDir</name>
    <value>/home/hbase/zookeeper</value>
  </property>
  <property>
    <name>hbase.cluster.distributed</name>
    <value>true</value>
  </property>
</configuration>

hbase-env.sh:
...
export JAVA_HOME=/usr/lib/jvm/java-8-oracle
...


SSH bypass a passphrase

hbase@45883500b170:~/hbase-1.2.2/bin$ ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
Generating public/private rsa key pair.
Your identification has been saved in /home/hbase/.ssh/id_rsa.
Your public key has been saved in /home/hbase/.ssh/id_rsa.pub.
The key fingerprint is:
57:57:7d:53:3d:54:3e:c5:fe:ef:58:db:1e:07:c1:51 hbase@45883500b170
The key's randomart image is:
+--[ RSA 2048]----+
|              o+E|
|             . **|
|            . +o=|
|           . . .o|
|        S .   . .|
|         .     ..|
|               .+|
|               o*|
|              .++|
+-----------------+
hbase@45883500b170:~/hbase-1.2.2/bin$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
hbase@45883500b170:~/hbase-1.2.2/bin$ chmod 0600 ~/.ssh/authorized_keys

Starting up HBase

hbase@45883500b170:~/hbase-1.2.2/bin$ ./start-hbase.sh 
localhost: starting zookeeper, logging to /home/hbase/hbase-1.2.2/bin/../logs/hbase-hbase-zookeeper-45883500b170.out
starting master, logging to /home/hbase/hbase-1.2.2/bin/../logs/hbase--master-45883500b170.out
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=128m; support was removed in 8.0
starting regionserver, logging to /home/hbase/hbase-1.2.2/bin/../logs/hbase--1-regionserver-45883500b170.out

Whiling start up HBase it creates required files and directory in HDFS as below


Open and Hadoop Web Interface

Testing

hbase@45883500b170:~/hbase-1.2.2/bin$ ./hbase shell
2016-08-29 06:47:10,665 WARN  [main] util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
HBase Shell; enter 'help<RETURN>' for list of supported commands.
Type "exit<RETURN>" to leave the HBase Shell
Version 1.2.2, r3f671c1ead70d249ea4598f1bbcc5151322b3a13, Fri Jul  1 08:28:55 CDT 2016

hbase(main):001:0> create 'test', 'cf'
0 row(s) in 4.8240 seconds

=> Hbase::Table - test
hbase(main):002:0> list 'test'
TABLE                                                                                                                                                     
test                                                                                                                                                      
1 row(s) in 0.0280 seconds

=> ["test"]
hbase(main):003:0> put 'test', 'row1', 'cf:a', 'value1'
0 row(s) in 0.1310 seconds

hbase(main):004:0> put 'test', 'row2', 'cf:b', 'value2'
0 row(s) in 0.0200 seconds

hbase(main):005:0> put 'test', 'row3', 'cf:c', 'value3'
0 row(s) in 0.0150 seconds

hbase(main):006:0> scan 'test'
ROW                                     COLUMN+CELL                                                                                                       
 row1                                   column=cf:a, timestamp=1472453260190, value=value1                                                                
 row2                                   column=cf:b, timestamp=1472453264719, value=value2                                                                
 row3                                   column=cf:c, timestamp=1472453270502, value=value3                                                                
3 row(s) in 0.0350 seconds

hbase(main):007:0> get 'test', 'row1'
COLUMN                                  CELL                                                                                                              
 cf:a                                   timestamp=1472453260190, value=value1                                                                             
1 row(s) in 0.0350 seconds

hbase(main):008:0> exit