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From Billy Bones <>
Subject Multiple instances?
Date Wed, 10 Dec 2014 14:57:58 GMT
Hi guys,

I'm currently preparing a migration of our Operating System which handle
our current tomcat installation from an OLD Linux using init scripts to a
CentOS7 release using sytemd.

Because I don't want to disturb the way the old server handle the webapps
(not yet :-) ), I have to start 2 separated instances of tomcat on the new

Using init script to boot multiples instance is quite easy, but know I'll
use systemd and I have to adapt.

I installed my OS and Tomcat from the CentOS repos, take a look at the
tomcat.service unit and tomcat-sysd script to see how the things work.
But now I'm a little bit disappointed, I don't understand how to have
multiple instances.

I created a tomcat@jcr.service unit file on my systemd directory and read
about the steps to achieve.

The first step said that *"by default SERVICE_NAME=tomcat. and must be
defined BEFORE tomcat-sysd is called"*

Well, OK, but how am I suppose to do that? Using environnement variables?
PreStartExec directive? Environnement directive?

I really don't get it, even looking at the tomcat-sysd wrapper script which
indicate me HOW the system run multiple instance don't help me to
understand WHERE am I suppose to put that information.

I understand that I have to create a new unit file, a new
/etc/sysconfig/tomcat file named according to the systemd unit, but I don't
get it about the SERVICE_NAME.

So if someone could help me a little bit, I'll be happy ^^

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