Configure HDFS Access for Pulse

This page describes how to configure a Kerberos-secured Hadoop cluster so that Pulse can request the NameNode API. To enable secure access, you must update the HDFS configuration.

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Steps to Configure

• Add the administrator property in hdfs-site.xml.

In the HDFS configuration, add the property dfs.cluster.administrators under Advanced or Custom hdfs-site.xml.

• Set the value to the Pulse Kerberos username.

Example:

<property> 
 <name>dfs.cluster.administrators</name> 
 <value>pulse-kerberos-user</value> 
</property>

• Provide a NameNode service keytab to Pulse.

Copy the NameNode service keytab to the Pulse server. Pulse uses this keytab to authenticate with the Hadoop NameNode through Kerberos and securely collect metrics.

• Apply the updated configuration.

• Restart all the HDFS services that use the updated hdfs-site.xml (such as the NameNode and DataNodes) so they load the new property.
• Use Ambari or CM to deploy the new client configuration to all nodes. This ensures Pulse automatically picks up the changes.

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Result

Pulse securely authenticates with the Kerberos-enabled Hadoop cluster and requests the NameNode API to collect required metrics.