@Reed Villanueva Regarding your query: 1. What is the point of these ambari users / groups? Ambari-level administrators can assign user and group access to Ambari-, Cluster-, Host-, Service-, and User- (view-only) level permissions. Access levels allow administrators to categorised cluster users and groups based on the permissions that each level includes. Permissions that an Ambari-level administrator assigns each user or group define each role. These roles can be understood using the following table mentioned in the following doc. To understand which ambari role holder can do what. https://docs.hortonworks.com/HDPDocuments/Ambari-2.7.3.0/administering-ambari/content/amb_roles_and_authorizations.html 2. What is the context they are intended to be used in? When a user wants to login to Ambari UI or say in a Specific View like File View / Hive View ...etc then in that case the Users created in Ambari DB (listed in the "users" table) can perform the actions according to their roles defined. For Local users ambari will authenticate them using the password listed inside the "users" table. But for the LDAP users the authentication will be done at the LDAP level (because ambari does not store the LDAP Sync users passwords in it's DB). .
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