HBASE & Java: Connecting Secure

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In this tutorial I will show you how to connect to an Secure HBASE using Java. It’s rather straight forward.

Import SSL Cert to Java:

Follow this tutorial to “Installing unlimited strength encryption Java libraries”

If on Windows do the following

#Import it
"C:\Program Files\Java\jdk1.8.0_171\bin\keytool" -import -file hadoop.csr -keystore "C:\Program Files\Java\jdk1.8.0_171\jre\lib\security\cacerts" -alias "hadoop"
 
#Check it
"C:\Program Files\Java\jdk1.8.0_171\bin\keytool" -list -v -keystore "C:\Program Files\Java\jdk1.8.0_171\jre\lib\security\cacerts"
 
#If you want to delete it
"C:\Program Files\Java\jdk1.8.0_171\bin\keytool" -delete -alias hadoop -keystore "C:\Program Files\Java\jdk1.8.0_171\jre\lib\security\cacerts"

POM.xml

<dependency>
	<groupId>org.apache.hbase</groupId>
	<artifactId>hbase-client</artifactId>
	<version>2.1.0</version>
</dependency>
<dependency>
	<groupId>org.apache.hbase</groupId>
	<artifactId>hbase</artifactId>
	<version>2.1.0</version>
	<type>pom</type>
</dependency>

Imports:

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.security.UserGroupInformation;

Initiate Kerberos Authentication

System.setProperty("java.security.auth.login.config", "C:\\data\\kafkaconnect\\kafka\\src\\main\\resources\\client_jaas.conf");
System.setProperty("https.protocols", "TLSv1,TLSv1.1,TLSv1.2");
System.setProperty("java.security.krb5.conf", "C:\\Program Files\\Java\\jdk1.8.0_171\\jre\\lib\\security\\krb5.conf");
System.setProperty("java.security.krb5.realm", "REALM.CA");
System.setProperty("java.security.krb5.kdc", "REALM.CA");
System.setProperty("sun.security.krb5.debug", "false");
System.setProperty("javax.net.debug", "false");
System.setProperty("javax.net.ssl.keyStorePassword", "changeit");
System.setProperty("javax.net.ssl.keyStore", "C:\\Program Files\\Java\\jdk1.8.0_171\\jre\\lib\\security\\cacerts");
System.setProperty("javax.net.ssl.trustStore", "C:\\Program Files\\Java\\jdk1.8.0_171\\jre\\lib\\security\\cacerts");
System.setProperty("javax.net.ssl.trustStorePassword", "changeit");
System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");

Config:

We will use the basic configuration here. You should secure the cluster and use appropriate settings for that.

// Setup the configuration object.
final Configuration config = HBaseConfiguration.create();
config.set("hbase.zookeeper.quorum", "hadoop");
config.set("hbase.zookeeper.property.clientPort", "2181");
config.set("hadoop.security.authentication", "kerberos");
config.set("hbase.security.authentication", "kerberos");
config.set("hbase.cluster.distributed", "true");
config.set("hbase.rpc.protection", "integrity");
config.set("zookeeper.znode.parent", "/hbase-secure");
config.set("hbase.master.kerberos.principal", "hbase/hadoop@REALM.CA");
config.set("hbase.regionserver.kerberos.principal", "hbase/hadoop@REALM.CA");

Connect:

Now we create the connection.

UserGroupInformation.setConfiguration(config);
UserGroupInformation.setLoginUser(UserGroupInformation.loginUserFromKeytabAndReturnUGI("hbase/hadoop@REALM.CA", "c:\\data\\hbase.service.keytab"));
 
System.out.println(UserGroupInformation.getLoginUser());
System.out.println(UserGroupInformation.getCurrentUser());
 
Connection conn = ConnectionFactory.createConnection(config);
 
//Later when we are done we will want to close the connection.
conn.close();

Hbase Admin:

Retrieve an Admin implementation to administer an HBase cluster. If you need it.

Admin admin = conn.getAdmin();
//Later when we are done we will want to close the connection.
admin.close();