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From Billy Bones <gael.ther...@gmail.com>
Subject Re: Multiple instances?
Date Wed, 10 Dec 2014 15:35:14 GMT
Hi Christopher,

Many thanks for your answer, well, I'm pretty comfortable with systemd
myself as I rely on it for my Fedora box for a long time ago, but on this
particular topic regarding tomcat, I don't really understand the purpose of
this special sentence.
As you pointed it, for me too usually caps names == env variables but as on
the tomcat-sysd script it's simply called without futher sources I'm not
quite sure for now.

Well, lets see if another *NIX Admin already had started multi-instances
tomcat on systemd distributions :D

Another way would be to completly duplicate the tomcat directory and
service unit and start both at runtime but... doesn't seems too shiny for a
new server :D

2014-12-10 16:27 GMT+01:00 Christopher Schultz <chris@christopherschultz.net
>:

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> Billy,
>
> On 12/10/14 9:57 AM, Billy Bones wrote:
> > 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.
>
> Hrm. Good luck getting help with systemd. The ASF doesn't even support
> init.d scripts, though I'm sure many *NIX admins here can help with
> init.d scripts (including myself). systemd is a bit new, to ... we'll see.
>
> > 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 machine.
> >
> > 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 have no idea. Generally, whenever I see something in ALL_CAPS that
> needs to be set to a value, it's an environment variable. With
> systemd, it could mean just about anything.
>
> > 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 ^^
>
> Ultimately, it will all boil down to CATALINA_BASE and CATALINA_HOME
> as far as Tomcat is concerned. The SERVICE_NAME is probably a
> systemd-only thing.
>
> Good luck,
> - -chris
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