Wednesday, 5 October 2016

How To Stream JSON Data Into HBase Using Apache Flume

Pre-Requisites of Flume Project:

Project Compatibility :
1. hadoop-2.6.0 + hbase-0.98.4 + flume-1.6.0
2. hadoop-2.7.2 + hbase-1.1.2 + flume-1.7.0

NOTE: Make sure that install all the above components

Flume Project Download Links:

`hadoop-2.6.0.tar.gz` ==> link
`apache-flume-1.6.0-bin.tar.gz` ==> link
`kalyan-json-hbase-agent.conf` ==> link
`kalyan-flume-project-0.1.jar` ==> link
`bigdata-examples-0.0.1-SNAPSHOT-dependency-jars.jar` ==> link


1. create "kalyan-json-hbase-agent.conf" file with below content

agent.sources = EXEC
agent.channels = MemChannel
agent.sinks = HBASE

agent.sources.EXEC.type = exec
agent.sources.EXEC.command = tail -F /tmp/users.json
agent.sources.EXEC.channels = MemChannel

agent.sinks.HBASE.type = hbase
agent.sinks.HBASE.table = users2
agent.sinks.HBASE.columnFamily = cf
agent.sinks.HBASE.serializer = com.orienit.kalyan.flume.sink.JsonHbaseEventSerializer
agent.sinks.HBASE.serializer.colNames=userid,username,password,email,country,state,city,dt = MemChannel

agent.channels.MemChannel.type = memory
agent.channels.MemChannel.capacity = 1000
agent.channels.MemChannel.transactionCapacity = 100

2. Copy "kalyan-json-hbase-agent.conf" file into "$FUME_HOME/conf" folder

3. Copy "kalyan-flume-project-0.1.jar and bigdata-examples-0.0.1-SNAPSHOT-dependency-jars.jar" files into "$FLUME_HOME/lib" folder

4. Generate Large Amount of Sample JSON data follow this article.

5. Execute Below Command to Generate Sample JSON data with 100 lines. Increase this number to get more data ...

java -cp $FLUME_HOME/lib/bigdata-examples-0.0.1-SNAPSHOT-dependency-jars.jar \
com.orienit.kalyan.examples.GenerateUsers \
-f /tmp/users.json \
-n 100 \
-s 1

6. Verify the Sample JSON data in Console, using below command

cat /tmp/users.json

7. To work with Flume + HBase Integration

Follow the below steps

1. start the hbase using below 

2. verify the hbase is running or not with "jps" command

3. connect to hbase using below command 

hbase shell

4. list out all the tables in hbase using 'list' command

5. create the hbase table name is 'users2' with column family name is 'cf' using below command.

create 'users2', 'cf'

6. read the data from hbase table 'users2' using below command.
scan 'users2'

8. Execute the below command to `Extract data from JSON data into HBase using Flume`

$FLUME_HOME/bin/flume-ng agent -n agent --conf $FLUME_HOME/conf -f $FLUME_HOME/conf/kalyan-json-hbase-agent.conf -Dflume.root.logger=DEBUG,console

9. Verify the data in console

10. Verify the data in HBase

Execute below command to get the data from hbase table 'users2'

count 'users2'

scan 'users2'

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