PowerScale OneFS HDFS Configuration Guide

Ambari agent

The Apache Ambari client and server framework, as part of the Hortonworks Data Platform (HDP), is an optional third-party tool that enables you to configure, manage, and monitor a Hadoop cluster through a browser-based interface. This section applies only to the OneFS Ambari agent through Ambari 2.6.

The OneFS Ambari agent is configured per access zone. You can configure the Ambari agent in any access zone that contains HDFS data. To start the Ambari agent in an access zone, you must specify the IPv4 address of the external Ambari server and the address of a NameNode. The NameNode acts as the point of contact for the access zone.

The Apache Ambari server receives communications from the Ambari agent. Once the Ambari agent is assigned to the access zone, it registers with the Ambari server. The agent then provides heartbeat status to the server. The Ambari server must be a resolvable hostname, FQDN, or IPv4 address and must be assigned to an access zone.

The NameNode is the designated point of contact in an access zone that Hadoop services manage through the Ambari interface. For example, if you manage services such as YARN or Oozie through the Ambari agent, the services connect to the access zone through the specified NameNode. The Ambari agent communicates the location of the designated NameNode to the Ambari server and to the Ambari agent. If you change the designated NameNode address, the Ambari agent updates the Ambari server. The NameNode must be a valid SmartConnect zone name or an IP address from the IP address pool that is associated with the access zone.

The OneFS Ambari agent is based on the Apache Ambari framework and is compatible with multiple Ambari server versions. For a complete list of supported versions, see the Hadoop Distributions and Products Supported by OneFS page.