> Date: Tue, 15 May 2012 01:18:06 +0200
> From: a...@ice-sa.com
> To: users@tomcat.apache.org
> Subject: Re: Multiple tomcat Instances on Same Server and One Apache Instance
>
> Apologies, I probably confused you too. See below.
>
> Vickie Troy-McKoy wrote:
> ...
>
> >>>>>>
> >>>>>> When I call abc*, it goes to instance1; and when I call xyz*, it goes
> >>>>>> to instance2. However, both instances have apps that start with
> >>>>>> "tsa". How do I configure the apache webserver to service the "tsa"
> >>>>>> app for both tomcat instances?
> >>>>> configure a load balancer (worker) that uses the (other) two workers,
> >>>>> in addition to the
> >>>>> two workers, and add it to the worker list.
> >>>> I think that rather than be added to the workers list, the load-balancer
> >>>> worker must be the only one in the list. You then tell the balancer to
> >>>> balance the two other workers.
> >>> Then the two individual apps won't work, as they're not present on both
> >>> servers.
> >> Oh. I did not read the OP's requirements carefully enough. Apologies,
> >> your instructions
> >> were correct for the OP.
> > ---------------------------------------------------
> >
> > Thank you all for your suggestions. I tried configuring a load balancer
> > worker; however, I'm getting HTTP 500 messages--Internal Server Error. I
> > reviewed the reference page; however, apparently, I'm missing something.
> > Also in the mod_jk.log, there's an error stating: "Could not find worker
> > with name 'instance2' in uri map post processing". Any ideas? Thank you...
> >
> > On the apache server in httpd.conf, I changed the JKMount statements
> > because I wanted to access all content.
> >
> > Listen 80
> > .
> > .
> > .
> > LoadModule jk_module modules/mod_jk.so
> >
> > #
> > JkWorkersFile conf/workers.properties
> > JkMount /* instance1
> > JkMount /* instance2
>
> That is probably not what you want (and the one contradicts the other).
> You should probably have instead :
>
> # forward "/abc*" requests to Tomcat "instance1" only
> JkMount /abc instance1
> JkMount /abc* instance1
>
> # forward "/xyz*" requests to Tomcat "instance2" only
> JkMount /xyz instance2
> JkMount /xyz* instance2
>
> # forward "/tsa*" requests to either Tomcat, as selected by the balancer
> worker
> JkMount /tsa balance1
> JkMount /tsa* balance1
>
> Note: if you really want to forward everything to Tomcat, and it doesn't
> matter which
> Tomcat, and you want to let the balancer decide when to forward any request
> to either
> Tomcat-1 or Tomcat-2, then just use the single line :
> JkMount /* balance1
>
>
>
>
> >
> > In workers.properties, added the load balancer information; it reflects
> > the following:
> >
> You seem to be missing :
>
> workers.list=instance1,instance2,balance1
>
> (as per Pid's earlier instructions, not as per my erroneous comment)
>
> > worker.balance1.type=lb
> > worker.balance1.balance_workers=instance1, instance2 <-- mod_jk may not
> > like the space after comma
> > #
> > worker.instance1.port=8009
> > worker.instance1.host=server.xxxx.com
> > worker.instance1.type=ajp13
> >
> > #
> > worker.instance2.port=7009
> > worker.instance2.host=server.xxxx.com
> > worker.instance2.type=ajp13
> >
> >
> > On the tomcat server (which is the same server), I added the jvmRoute
> > setting in server.xml. For instance one, I added:
> >
> > <Engine name="Catalina" defaultHost="localhost" jvmRoute="instance1">
> >
> > For instance two, I added: <Engine name="Catalina"
> > defaultHost="localhost" jvmRoute="instance2">
> >
>
>
> ---------------------------------------------------------------------
Thanks again. I'll try this tomorrow. I just want to forward based on the
port that the Tomcat instance is running on. The 2 tomcat instances running on
the same server is really the same application--but different versions. And, I
thought that I could use the existing Apache instance to forward requests to
the new version of the app running on tomcat as well. But, if I want (e.g. the
tsademo app) the tomcat instance running on port 8009; and tsademo is being
forwarded to both ports--how can I be sure that I would get the tsademo running
on port 8009 and not the one running on 7009? I tried using the Virtual host
in Apache; but, ran into issues with that. Or, should I just go ahead and
create an entirely new apache instance for the new tomcat instance?
Regards,
