Re: Apache as front-end for several tomcat

Christophe Lemaire Thu, 31 Mar 2005 03:52:09 -0800

Oh, I forgot to say I can't see which virtual host is used in the access_log. How can I do that?

Here is what I have in the access log :
194.78.221.136 - - [31/Mar/2005:13:41:11 +0200] "GET / HTTP/1.1" 401 942
194.78.221.136 - - [31/Mar/2005:13:41:11 +0200] "GET / HTTP/1.1" 401 942

Christophe

There are 3 backend servers, 2 servers run one Tomcat on standard ports and 1 server runs two Tomcat on different ports (see file workers.porperties).

For the log file, I have only 1 log file for all the workers defined in mod_jk.conf by the following line :
# Where to put jk logs
JkLogFile logs/mod_jk.log
So I don't have any info about the other workers.
If you are talking about the other tomcat, I can access them directly via their IP and port with a browser on the LAN. So I can say all the tomcat servers are up and running.

The strange thing is that this setup works fine with mod_JK2. But I would like to have a setup with JK1 since JK2 is not supported anymore.
Regards,
Christophe
On 31-mars-05, at 01:28, Montz, James C. (James Tower) wrote:
Are the Tomcat instance running on the same physical server and you are just using IP Aliases, or are the workers running on 3 sperate backend machines?

You apache config looks OK, so I don't believe its an issue with Apache Virtual Host configuration. I believe all work in being forwarded to Demo1 only.

I believe you can have multiple instances of tomcat listening on the same port by specifying an IP address in the connector. But I find it much easier just to congigure each instance to listen on a different port. If you check your other 2 workers log files, you will probably see an error similar to "Bind address already in use". Modify each Tomcat instance to the SHUTDOWN and AJP listener are each on unique ports;
For example, In each respective instance server.xml use;
Demo1 Shutdown: 8001
Demo1 HTTP: 8081
Demo1 AJP Listener: 8101
Demo2 Shutdown: 8002
Demo2 HTTP: 8082
Demo2 AJP Listeer: 8102
Demo3 Shutdown: 8003
Demo3 HTTP: 8083
Demo3 AJP Listern: 8103
Restart each instance (check the catalina.out for errors)
Modify your workers.properties file to relect the new AJP listen ports
Restart Apache
-----Original Message-----
From: Dan Barron [mailto:[EMAIL PROTECTED]
Sent: Wednesday, March 30, 2005 3:48 PM
To: Tomcat Users List; Tomcat Users List
Subject: Re: Apache as front-end for several tomcat
If you are running multiple instances of Tomcat, from what I understand and from my configuration (i run two Tomcat/mod_jk2 with Apache) you would then need each of them to listen on a different port. Right now the only instance that will receive requests via the worker is the instance that is using port 8009.

At 01:33 PM 3/30/2005, Christophe Lemaire wrote:
Not sure. I have seen several config of name based virtual hosts that
listen on the same port.
On 30-mars-05, at 23:02, Didier McGillis wrote:
would it be the fact that your sending the requests through the same
port number?
From: Christophe Lemaire <[EMAIL PROTECTED]>
Reply-To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
To: tomcat-user@jakarta.apache.org
Subject: Apache as front-end for several tomcat
Date: Wed, 30 Mar 2005 22:12:27 +0200
Hello,
I would like to setup a Apache 2.0.53 as front-end for several Tomcat
5.0.19. I use JK1.2.8 as connector.
I have defined one worker per tomcat server. I use three name based
virtual hosts in the apache config.
The problem is only the first virtual host works. In the mod_jk.log, I can see that every request sent to the apache are checked with the JkMount from the first virtual host only.
Here are my config files :
-------------------- workers.properties -----------------------
worker.list=demo1,demo2,demo3,stat
worker.demo1.type=ajp13
worker.demo1.host=192.168.0.1
worker.demo1.port=8009
worker.demo2.type=ajp13
worker.demo2.host=192.168.0.2
worker.demo2.port=8009
worker.demo3.type=ajp13
worker.demo3.host=192.168.0.3
worker.demo3.port=8009
worker.stat.type=ajp13
worker.stat.host=192.168.0.3
worker.stat.port=7201
----------------- end of  workers.properties -------------------
In the httpd.conf file, I include the file mod_jk.conf (no other
virtual hosts are defined in httpd.conf):
-------------------- mod_jk.conf ----------------------- # Load
mod_jk module LoadModule jk_module modules/mod_jk.so
# Where to find workers.properties
JkWorkersFile conf/workers.properties
# Where to put jk logs
JkLogFile logs/mod_jk.log
# Set the jk log level [debug/error/info] JkLogLevel debug
# Select the log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y] "
# JkRequestLogFormat set the request format JkRequestLogFormat "%w %V
%T"
NameVirtualHost *:81
<VirtualHost *:81>
   ServerName demo1.myweb.org
   JkMount /*/tracking/* stat
   JkMount /tracking/* stat
   JkMount /web/* demo1
   JkMount /ald/* demo1
   JkMount /htmleditor/* demo1
   JkMount /* demo1
</VirtualHost>
<VirtualHost *:81>
   ServerName demo2.myweb.org
   JkMount /*/tracking/* stat
   JkMount /* demo2
</VirtualHost>
<VirtualHost *:81>
   ServerName demo3.myweb.org
   JkMount /*/tracking/* stat
   JkMount /* demo3
</VirtualHost>
----------------- end of mod_jk.conf -------------------
Extract from mod_jk.log :
URL typed in the browser : http://demo3.myweb.org:81/
[Wed Mar 30 22:15:46 2005] [12762:8192] [debug]
map_uri_to_worker::jk_uri_worker_map.c (700): Attempting to map URI
'/'
from 6 maps [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (718): Attempting to map context URI '/*/tracking/*' [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (718): Attempting to map context URI '/tracking/*' [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (718): Attempting to map context URI '/web/*' [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (718): Attempting to map context URI '/ald/*' [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (718): Attempting to map context URI '/htmleditor/*' [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (718): Attempting to map context URI '/*' [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] map_uri_to_worker::jk_uri_worker_map.c (755): Found a context match demo1 -> / [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] jk_handler::mod_jk.c (1715): Into handler jakarta-servlet worker=demo1 r->proxyreq=0 [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] wc_get_worker_for_name::jk_worker.c (92): found a worker demo1 [Wed Mar 30 22:15:46 2005] [12762:8192] [debug] init_ws_service::mod_jk.c (479): agsp=81 agsn=demo3.myweb.org hostn=demo3.myweb.org shostn=demo1.myweb.org cbsport=0 sport=0 claport=81
But I get the homepage of demo1.myweb.org...
Any idea why this happen?
Thanks in advance,
Christophe
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Re: Apache as front-end for several tomcat

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