Adding Tag-Based Policies

Tag-based policies enable you to control access to resources across multiple Hadoop components without creating separate services and policies in each component. You can also use Ranger TagSync to synchronize the Ranger tag store with an external metadata service such as Apache Atlas.

1. Select Access Manager > Tag Based Policies, then select a tag-based service.
   
2. On the List of Policies page, click Add New Policy.
   
   The Create Policy page appears:
3. Enter information on the Create Policy page as follows:

   Table 1. Policy Details

   Field	Description
   Policy Type	Set to Access by default.
   Policy Name	Enter an appropriate policy name. This name cannot be duplicated across the system. This field is mandatory.
   TAG	Enter the applicable tag name.
   Description	(Optional) Describe the purpose of the policy.
   Audit Logging	Specify whether this policy is audited. (De-select to disable auditing).
   Policy Label	Specify a label for this policy. You can search reports and filter policies based on these labels.

   Table 2. Allow, Exclude from Allow, Deny, and Exclude from Deny Conditions

   Label	Description
   Select Group	Specify the group to which this policy applies. To designate the group as an Administrator for the chosen resource, specify Admin permissions. (Administrators can create child policies based on existing policies). The public group contains all users, so setting a condition for the public group applies to all users.
   Select User	Specify a particular user to which this policy applies (outside of an already-specified group) OR designate a particular user as Admin for this policy. (Administrators can create child policies based on existing policies).
   Policy Conditions	Click Add Conditions to add or edit policy conditions. "Accessed after expiry_date (yes/no)?": To set this condition, type yes in the text box, then select the green check mark button to add the condition. Enter boolean expression: Available for allow or deny conditions on tag-based policies. For examples and details, see “Using Tag Attributes and Values in Ranger Tag-Based Policy Conditions”.
   Component Permissions	Click Add Permissions to add or edit component conditions. To add component permissions, enter the component name in the text box, then use the check boxes to specify component permissions. Select the green check mark button to add the chosen component conditions to the policy.

   	Note
   	Currently there is no Atlas hook for HBase, HDFS, or Kafka. For these components, you must “Manually Creating Entities in Atlas”. You can then associate tags with these entities and control access using Ranger tag-based policies.

4. You can use the Plus (+) symbols to add additional conditions. Conditions are evaluated in the order listed in the policy. The condition at the top of the list is applied first, then the second, then the third, and so on.
5. Click Add to add the new policy.