Connect to secure Hbase cluster in Java application

[#1]

Below are the high level requirements which are needed to connect to Secure Hbase cluster

- hbase-client

- Hbase config file

- Kerberos config files and keytab for user

Pom file and Sample Code are given below:

Java Class: (Change Paths for config files and kerberos related parameters):

package com.hortonworks.hbase;import java.io.IOException;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.fs.Path;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.TableName;import org.apache.hadoop.hbase.client.Connection;import org.apache.hadoop.hbase.client.ConnectionFactory;import org.apache.hadoop.hbase.client.ResultScanner;import org.apache.hadoop.hbase.client.Scan;import org.apache.hadoop.hbase.client.Table;import org.apache.hadoop.security.UserGroupInformation;public class HBaseConnection {  public
static void main(String ar[]) throws IOException {  //
System Properties (Change Path/Properties according to env)  //
copy krb5.conf from cluster  System.setProperty("java.security.krb5.conf",
"/Users/schhabra/krb5.conf");  System.setProperty("javax.security.auth.useSubjectCredsOnly",
"true");  //
Configuration (Change Path/Properties according to env)  Configuration
configuration = HBaseConfiguration.create();  configuration.set("hadoop.security.authentication",
"Kerberos");  //
copy hbase-site.xml and hdfs-site.xml from cluster and set paths  configuration.addResource(new
Path("file:///Users/schhabra/hbase-site.xml"));  configuration.addResource(new
Path("file:///Users/schhabra/hdfs-site.xml"));  UserGroupInformation.setConfiguration(configuration);  //
User information (Change Path/Properties according to env)  UserGroupInformation.loginUserFromKeytab("[email protected]",    "/Users/schhabra/smokeuser.headless.keytab");  //
Connection  Connection
connection =
ConnectionFactory.createConnection(HBaseConfiguration.create(configuration));   System.out.println(connection.getAdmin().isTableAvailable(TableName.valueOf("SYSTEM.STATS")));  Scan
scan1 = new Scan();  Table
table = connection.getTable(TableName.valueOf("test"));  ResultScanner
scanner = table.getScanner(scan1);  }}

POM: (Dependencies)

<project
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
<modelVersion>4.0.0</modelVersion>
 
<groupId>com.hortonworks</groupId>
 
<artifactId>hbase</artifactId>
 
<version>0.0.1-SNAPSHOT</version>
 
<packaging>jar</packaging>
 
<name>hbase</name>
 
<url>http://maven.apache.org</url>
  <properties>
 
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <repositories>
 
<repository>
 
<id>HDP</id>
 
<name>HDP Releases</name>
 
<!--url>http://repo.hortonworks.com/content/repositories/releases/</url-->
 
<url>http://repo.hortonworks.com/content/groups/public</url>
 
</repository>
 
</repositories>
  <dependencies>
  <dependency>
 
<groupId>junit</groupId>
 
<artifactId>junit</artifactId>
 
<version>3.8.1</version>
 
<scope>test</scope>
 
</dependency>
    <dependency>
 
<groupId>org.apache.hbase</groupId>
 
<artifactId>hbase-client</artifactId>
 
<version>1.1.2.2.5.0.0-1245</version>
  </dependency>
 
</dependencies>
</project>

[#2]

Hi @schhabra1,

Is there a way to connect HBase via Knox ?

I have posted the question in the below link. Can you please take a look at the below one?

https://community.cloudera.com/t5/Support-Questions/Connect-to-HBase-via-KNOX-using-HBase-Java-clien...

Thanks.