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https://issues.apache.org/jira/browse/HAWQ-1473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16032143#comment-16032143
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ASF GitHub Bot commented on HAWQ-1473:
--------------------------------------
Github user dyozie commented on a diff in the pull request:
https://github.com/apache/incubator-hawq-docs/pull/120#discussion_r119490263
--- Diff: markdown/ranger/ranger-integration-config.html.md.erb ---
@@ -129,6 +129,64 @@ 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.
+
+Ranger Admin high availability and HAWQ Ranger Plug-in Service high
availability are independent; you can configure HAWQ Ranger Plug-in Service HA
without configuring HA for Ranger Admin.
+
+### 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.
+
+- (Optional) 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. (Optional) If you have configured Ranger Admin HA, 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 the service runs 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.
+
+**Note**: If you configured and registered the master HAWQ Ranger Plug-in
Service before you initialized your HAWQ standby master node, you do not need
to perform the steps in this section.
--- End diff --
This note is confusing. The last bullet under prerequisites specifically
states that they should have already registered the master plug-in and standby
master. If it's true that setting up the master plug-in first and then
configuring the standby master automatically registers the standby plug-in,
then this note should probably appear much earlier (before the prerequisites).
> document ranger plug-in service high availability
> -------------------------------------------------
>
> Key: HAWQ-1473
> URL: https://issues.apache.org/jira/browse/HAWQ-1473
> Project: Apache HAWQ
> Issue Type: Improvement
> Components: Documentation
> Reporter: Lisa Owen
> Assignee: David Yozie
>
> add RPS high availability information to the docs. include config info as
> well as failover scenarios.
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