Support Video: How to enable HDFS Namenode High Availability with Ambari?

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To ensure that another NameNode in a cluster is always available when an active NameNode host fails, the NameNode high availability should be enabled and configured on the cluster from the Ambari Web User Interface.

This video explains how to  enable HA wizard and the steps that must be followed to set up NameNode high availability.

Open the YouTube video here

As a prerequisite, ensure the following:

• If the HDFS or ZooKeeper services are in Maintenance Mode the NameNode HA wizard will not complete successfully.
• HDFS and ZooKeeper must be stopped and started when enabling NameNode HA as the Maintenance Mode will prevent those start and stop operations from occurring.

The Enable NameNode high availability section from the documentation contains the steps mentioned in this video.

Recommended links:

• Product documentation page
• Community Forum