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Posted to users@tomcat.apache.org by frannack Guimard <fr...@hotmail.com> on 2008/02/27 17:03:02 UTC

Tomcat load balanced with Apache HTTP Server and mod_jk



Hello,

Is there a way to add a Balancer Member to Apache HTTP Server on the fly?

I'm using Apache 2.2, Tomcat 5.5 and mod_jk. I have a Apache HTTP Server load balance request on the pool of workers (tomcat instances).
When I add a new worker, I would like Apache HTTP Server to be notify so it can add it on its balancer member list. I don't care if it's not persistent after reboot of the Apache HTTP Server.

Thank you,

Frannack

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RE: Tomcat load balanced with Apache HTTP Server and mod_jk

Posted by frannack Guimard <fr...@hotmail.com>.
Rainer,

I'm trying your solution of using apachectl graceful. The only problem is that it needs to be executed as root. I tried to write a perl cgi script to change automatically my worker.properties which works fine, but then, if I tried to run the apachectl command from inside the cgi script, I get a permission denied. I even tried to set the httpd user "nobody" in sudoers without password but it does not work either (I don't know why). I'm so close since when I manually do the apachectl command it does work, I just need to find a way to run this from the cgi script.

Does anyone could help?

Thank you.

Franck
----------------------------------------
> Date: Fri, 29 Feb 2008 10:43:56 +0100
> From: rainer.jung@kippdata.de
> To: users@tomcat.apache.org
> Subject: Re: Tomcat load balanced with Apache HTTP Server and mod_jk
> 
> Hi Frannack,
> 
> No, not at the moment.
> 
> A partial workaround: add all balamncer members you are assuming to 
> become valid in the future and put those, which don't yet exist into 
> activation=Stopped
> 
> Then you can put them into active without restart, once you build them up.
> 
> BTW: apachectl graceful is not *that* bad any more (but it destroys 
> non-persistent JK activation).
> 
> Regards,
> 
> Rainer
> 
> frannack Guimard wrote:
>> 
>> 
>> Hello,
>> 
>> Is there a way to add a Balancer Member to Apache HTTP Server on the fly?
>> 
>> I'm using Apache 2.2, Tomcat 5.5 and mod_jk. I have a Apache HTTP Server load balance request on the pool of workers (tomcat instances).
>> When I add a new worker, I would like Apache HTTP Server to be notify so it can add it on its balancer member list. I don't care if it's not persistent after reboot of the Apache HTTP Server.
>> 
>> Thank you,
>> 
>> Frannack
> 
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Re: Tomcat load balanced with Apache HTTP Server and mod_jk

Posted by Rainer Jung <ra...@kippdata.de>.
Hi Frannack,

No, not at the moment.

A partial workaround: add all balamncer members you are assuming to 
become valid in the future and put those, which don't yet exist into 
activation=Stopped

Then you can put them into active without restart, once you build them up.

BTW: apachectl graceful is not *that* bad any more (but it destroys 
non-persistent JK activation).

Regards,

Rainer

frannack Guimard wrote:
> 
> 
> Hello,
> 
> Is there a way to add a Balancer Member to Apache HTTP Server on the fly?
> 
> I'm using Apache 2.2, Tomcat 5.5 and mod_jk. I have a Apache HTTP Server load balance request on the pool of workers (tomcat instances).
> When I add a new worker, I would like Apache HTTP Server to be notify so it can add it on its balancer member list. I don't care if it's not persistent after reboot of the Apache HTTP Server.
> 
> Thank you,
> 
> Frannack

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