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.

Steps to Configure

1. 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>

2. 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.

3. 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.

Result

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