Comments on: Multiple Tomcat instances on Ubuntu

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By: Brian Pontarelli

Brian Pontarelli — Tue, 28 Dec 2010 18:45:33 +0000

That should work fine. You just need to ensure you can install both the 5.5. and 6.0 packages at the same time. This should be possible on most Linux varieties.

By: Yiorgos Katopodis

Yiorgos Katopodis — Mon, 27 Dec 2010 22:58:25 +0000

Nice work!!!
And this makes me think!!!
What if we want to run two different versions of tomcat on the same server, say 5x and 6x.
How could we manage that in case we have two different applications that one can run only with 5x and the other only with 6x?

By: Brian Pontarelli

Brian Pontarelli — Thu, 23 Sep 2010 15:20:11 +0000

Perhaps. The main difference here is that Apache is a single process where the way I have Tomcat setup is that each instance is a separate process. This was intentional in order to prevent one webapp from crashing others.

Any solution would need the ability to control single instances in cases of failures where a single instance needs to be restarted.

By: Marcel Heemskerk

Marcel Heemskerk — Thu, 23 Sep 2010 09:36:26 +0000

Hi Brain,

I can see if i can help you with that :)… though my DEB knowledge is newby!

Some ideas:
- would be great to have the possibility to turn a manual instance into a init.d’ed instance and vice versa
- how about a t6eninstance and t6disinstance command (like a2ensite and a2dissite) which places symlinks from instances-available to a instances-enabled folder. That way, init.d/tomcat6instances can take one argument (stop/start/restart) and does that on all instances.. or takes two arguments, where 2nd is the instance name from the dir “instances-enabled”

By: Brian Pontarelli

Brian Pontarelli — Wed, 22 Sep 2010 17:04:07 +0000

Marcel,

If you want to join the project I’ve setup, it is located here:

http://code.google.com/p/debian-tomcat-scripts/

That project can create DEB packages and contains some more advanced scripts. Eventually I’d like to start publishing the DEBs into a valid APT repo. These scripts are also using Tomcat 6.0.x and can certainly use Apache 2.2 and mod_proxy_ajp.

Let me know if you want to help on that project.

By: Marcel Heemskerk

Marcel Heemskerk — Wed, 22 Sep 2010 12:49:29 +0000

Hi Brian,

Your scripts are using the older JK workers style to connect apache to tomcat. With Apache 2.2, you can also use the (easier) mod_proxy_ajp.
Is it a good suggestion if you update your scripts to this?

Marcel

By: Brian Pontarelli

Brian Pontarelli — Mon, 31 Aug 2009 14:45:45 +0000

Jack,

I’d recommend checking out the latest work I’ve done on Tomcat on Linux. I posted a DEB for running multiple instances of Tomcat 6 on Linux and it completely replaces the standard Tomcat. It also cleans up many of the messes that Debian has created with their package and is a 100% valid Tomcat installation.

Here’s the post from the Ubuntu Forums on it:

http://ubuntuforums.org/showthread.php?t=1211517

I’ll put up another blog post here about it as well.

By: Jack Collier

Jack Collier — Sun, 30 Aug 2009 12:49:16 +0000

Are these scripts accurate as written for ubuntu 8.x and tomcat5.5?

Jack