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Posted to users@httpd.apache.org by cgogineni <ch...@gmail.com> on 2011/04/11 19:58:19 UTC
[users@httpd] Load balancer worker status
I am using apache + mod_jk + jboss for load balancing. Everything is
configured and working properly.
mod_jk ping's JBOSS server to check the status of the server.
But, I want to configure apache to hit a html/jsp in my application to check
the status.
The reason for this is, when JBOSS is running and my application is not
deployed, then apache still uses this node for load balancing and a 404
error page is displayed to the user.
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Re: [users@httpd] Load balancer worker status
Posted by Thomas Freitag <th...@freit.ag>.
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Hello cgogineni,
On 04/11/2011 07:58 PM, cgogineni wrote:
>
> I am using apache + mod_jk + jboss for load balancing. Everything is
> configured and working properly.
Glad to hear that. :)
> mod_jk ping's JBOSS server to check the status of the server.
>
> But, I want to configure apache to hit a html/jsp in my application to check
> the status.
>
> The reason for this is, when JBOSS is running and my application is not
> deployed, then apache still uses this node for load balancing and a 404
> error page is displayed to the user.
You cannot specify a test JSP page as this is more expensive than doing
a cping/cpong. An option might be another functionality: mod_jk allows
you to configure a node as "disabled" or "stopped", if a worker is
disabled only requests with a session on this node are sent to this
worker, if a worker is stopped, no requests are sent to it. You can
alter the worker state using the mod_jk web GUI (aka mod_jk status
worker). If you want to deploy or undeploy just stop the appropriate worker.
The mod_jk config option fail_on_status (see
http://tomcat.apache.org/connectors-doc/reference/workers.html) might
look helpful, but I would strongly discourage you from using it for a
HTTP 404, because you will run into trouble if someone mistypes a URL or
some embedded content (i.e. /favicon.ico) is not found.
For a detailed discussion about mod_jk the tomcat-users list
(users@tomcat.apache.org) is a better place to ask.
Best regards,
- --
Thomas Freitag
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