Configure for KMS for Sentry

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This section describes how to configure the Designer Cloud Powered by Trifacta® platform for integration with KMS system for Cloudera. It assumes that access to the cluster is gated by Sentry.

Before you begin, please verify the pre-requisites. See Configure for KMS.

Configure Hadoop Cluster

NOTE: These changes should be applied through the management console for the Hadoop cluster before pushing the client configuration files to the nodes of the cluster.

In the following sections:

[hadoop.user (default=trifacta)] - the userID accessing the cluster component
[hadoop.group (default=trifactausers)] -the appropriate group of user accessing the cluster component

Enable HDFS Encryption

On the Cloudera cluster, you may enable HDFS encryption using a designated Java KeyStore. For more information, see http://www.cloudera.com/documentation/enterprise/latest/topics/sg_hdfs_encryption_wizard.html?scroll=concept_n2p_5vq_vt#concept_fcq_phr_wt_unique_1.

Java KMS Configuration

Additional configuration for the Java KMS is required. See http://www.cloudera.com/documentation/enterprise/latest/topics/cdh_sg_kms.html.

Java KeyStore KMS Configuration

In the kms-site.xml configuration file, please locate the following properties:

NOTE: If you have deployed Cloudera Manager for your cluster, do not modify these properties in the file. Make any modifications through the Cloudera Manager console.

<property>
  <name>hadoop.kms.authentication.kerberos.keytab</name>
  <value>${user.home}/kms.keytab</value>
</property>

In Cloudera Manager, you may wish to change the following safety value value. Navigate to KMS service > Configuration > Advanced > Key Management Server Proxy Advanced Configuration Snippet (Safety Valve) for kms-site.xml. Modify the following:

<property>
    <name>hadoop.kms.aggregation.delay.ms</name>
    <value>10000</value>
</property>

In the kms-site.xml file, insert the following properties, which are required properties for the Key Management Server Advanced Configuration safety value:

<property>
  <name>hadoop.kms.authentication.kerberos.principal</name>
  <value>*</value>
</property>
<property>
  <name>hadoop.kms.proxyuser.[hadoop.user].groups</name>
  <value>[hadoop.group]</value>
</property>
<property>
  <name>hadoop.kms.proxyuser.[hadoop.user].hosts</name>
  <value>*</value>
</property>

HDFS Configuration

In httpfs-site.xml, please insert the following properties, which are the safety value for HttpFS Advanced Configuration:

<property>
  <name>httpfs.proxyuser.[hadoop.user].groups</name>
  <value>[hadoop.group]</value>
</property>
<property>
  <name>httpfs.proxyuser.[hadoop.user].hosts</name>
  <value>*</value>
</property>

Save the files.

Validate

After the configuration is complete, you can try to import a dataset from a source stored in a cluster location managed by KMS, assuming that any required authentication configuration has been completed. See Import Data Page.

For more information, see Configure Hadoop Authentication.

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