Managing and Monitoring a Cluster
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Delete a host from a cluster

Use Host Actions > Delete Host to remove a host from the cluster.

Deleting a host removes the host from the cluster.
Before deleting a host, you must:
  • Stop all components running on the host.

  • Decommission any DataNodes running on the host.

  • Move from the host any master components, such as NameNode or ResourceManager, running on the host.

  • Turn off host Maintenance Mode, if it is on.

  1. Using Ambari Web, browse the hosts page to find and click the FQDN of the host that you want to delete.
  2. On the Host page, click Host Actions.
  3. Click Delete Host.
    The host is removed from the cluster.