Github user ictmalili commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/120#discussion_r118811043
--- Diff: markdown/ranger/ranger-integration-config.html.md.erb ---
@@ -129,6 +129,62 @@ Once the connection between HAWQ and Ranger is
configured, you may choose to set
5. Click **Save** to save your changes.
6. Select **Service Actions > Restart All** and confirm that you want to
restart the HAWQ cluster.
+## <a id="enableha"></a>Step 3: (Optional) Register a Standby Ranger
Plug-in Service
+
+The HAWQ Ranger Plug-in Service runs on the HAWQ master node. If this
service goes down, all HAWQ database operations will fail. Configure a highly
available HAWQ Ranger Plug-in Service to eliminate possible downtime should
this situation occur.
+
+### Prerequisites <a id="rps_ha_cfg_prereq"></a>
+
+Before you configure HAWQ Ranger authentication in high availability mode,
ensure that you have:
+
+- Installed or upgraded to a version of HAWQ that includes support for
HAWQ Ranger Authentication.
+
+- Configured Ranger Admin for high availability.
+
+- Configured a HAWQ standby master node for your HAWQ cluster.
+
+ You must configure a standby master for your HAWQ deployment before
enabling HAWQ Ranger high availability mode. If you have not configured your
HAWQ standby master, follow the instructions in [Adding a HAWQ Standby
Master](../admin/ambari-admin.html#amb-add-standby) (if you manage your HAWQ
cluster with Ambari) or [Configuring Master
Mirroring](../admin/MasterMirroring.html#standby_master_configure) (for a
command-line-managed HAWQ cluster).
+
+- Registered the HAWQ Ranger Plug-in Service on your HAWQ master node.
+
+ The HAWQ Ranger Plug-in Service runs on the HAWQ master node. If you
have not yet enabled the Ranger Plug-in Service, refer to [Install Ranger
Connectivity to HAWQ](ranger-integration-config.html#jar) for registration
instructions. Make sure to identify the Ranger Admin HA proxy when you enable
the plug-in.
--- End diff --
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