After you create a cluster, users with Admin Admin privileges automatically get Operator permission on the cluster. By default, no users have access to the cluster. You can grant permissions on the cluster to other users and groups from the Ambari Administration interface.

Ambari manages the following permissions for a cluster: Operator and Read-Only. Users and Groups with Operator permission are granted access to the cluster. Operator permission provides full control of the following services:

Users and Groups with Read-Only permission can only view, not modify, services and configurations.

Users with Ambari Admin privileges are implicitly granted Operator permission. Plus, Ambari Admin users have access to the Ambari Administration interface which allows them to control permissions for the cluster.

To modify user and group permissions for a cluster:

For more information about managing users and groups, see Managing Users and Groups.

	Warning
	Assigning permissions to a group having no members is possible.

	Note
	Verify user permissions, group membership, and group permissions to ensure that each user and group has appropriate permissions.