Administering Ambari
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Terms and Definitions

The following basic terms help describe the key concepts associated with Ambari Administration.



Ambari Admin

Specific privilege granted to a user that enables the user to administer Ambari. The default user admin created by Ambari is flagged as an “Ambari Admin”. Users with the Ambari Admin privilege can grant, or revoke this privilege on other users.


User name, password and privileges.


Installation of a Hadoop cluster, based on a particular Stack, that is managed by Ambari.


Unique group of users in Ambari.

Group Type

Local and LDAP. Local groups are maintained in the Ambari database. LDAP groups are imported (and synchronized) with an external LDAP (if configured).


Represents the permission that can be granted to a principal (user or group) on a particular resource. For example, cluster resources support Operator and Read-Only permissions.


User or group that can be authenticated by Ambari.


Represents the mapping of a principal to a permission and a resource. For example: the user admin is granted the permission Operator on cluster DevCluster.


Represents the resource available and managed in Ambari. Ambari supports two types of resources: cluster and view. An Ambari Admin assigns permissions for a resource for users and groups.


Unique user in Ambari.

User Type

Local and LDAP. Local users are maintained in the Ambari database and authentication is performed against the Ambari database. LDAP users are imported (and synchronized) with an external LDAP (if configured).


Represents a Stack version, which includes a set of repositories to install that version on a cluster. For more information about Stack versions, see Manage Stack and Versions.


Defines a user interface component that is available to Ambari.