Github user ictmalili commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/120#discussion_r118811114
--- 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.
+
+
+### Configuring the Standby Ranger Plug-in Service <a
id="rps_ha_cfg_standbyrps"></a>
+
+The standby Ranger Plug-in Service runs on the HAWQ standby master node,
utilizing the same port number as that when running on the master node. To
enable HAWQ Ranger high availability, you must register the standby Ranger
Plug-in Service on the standby master node, and then restart the standby.
+
--- End diff --
I think it's not "restart standby".
If there was only a HAWQ master configured with Ranger, the user wants to
configure standby master, he only needs to do "hawq init standby
--standby-host=$standbyHost".
If there was a HAWQ cluster with standby master, the user wants to enable
Ranger on whole HAWQ cluster, he needs run the script "enable-ranger-plugin.sh"
on both master and standby master, and then restart HAWQ cluster.
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