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From Billy Bones <gael.ther...@gmail.com>
Subject Re: Multiple instances?
Date Thu, 18 Dec 2014 14:25:10 GMT
Ok soooo, here is a small update.

I've finally found what does this SERVICE_NAME mean, indeed you have to
copy the original unit, then add the Systemd's directive
 named Environment like this:

Environment="SERVICE_NAME=<YOUROWNSERVICENAMEHERE"

then you will copy the default tomcat config file found on the
/etc/sysconfig directory.

And as you supposed it Cristophe and Daniel, you then have to copy the
whole CATALINA_{HOME/BASE} or update the previous config file to point out
to another tomcat installation.

I hope it would help someone ;-)

2014-12-11 17:58 GMT+01:00 Billy Bones <gael.therond@gmail.com>:
>
> No problems, I'll keep you updated ;-)
>
> Thanks for your answers.
>
> 2014-12-11 15:24 GMT+01:00 Daniel Mikusa <dmikusa@pivotal.io>:
>
>> On Thu, Dec 11, 2014 at 3:45 AM, Billy Bones <gael.therond@gmail.com>
>> wrote:
>>
>> > Ok, then I'll completly wright another systemd unit derivated from the
>> one
>> > provided by CentOS.
>> >
>> > Yup, that what I thought about the CATALINA_HOME and BASE, so as you
>> > suggested, I'll test to run individual units and saw how it's going on.
>> >
>> > Many thanks guys.
>> >
>>
>> When you get something working, please share your solution :)
>>
>> I'm interested to see what you work out and I'm sure others will be as
>> well.
>>
>> Dan
>>
>>
>>
>> >
>> > 2014-12-10 18:10 GMT+01:00 Daniel Mikusa <dmikusa@pivotal.io>:
>> >
>> > > On Wed, Dec 10, 2014 at 10:35 AM, Billy Bones <gael.therond@gmail.com
>> >
>> > > wrote:
>> > >
>> > > > 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
>> > > >
>> > >
>> > > Starting different instances of Tomcat is mostly just a matter of
>> setting
>> > > the CATALINA_HOME and CATALINA_BASE environment variables to the right
>> > > locations.  I'm sure systemd has a way for you to set environment
>> > > variables, so that should be sufficient to start different instances.
>> > >
>> > > For more details on CATALINA_HOME and CATALINA_BASE, check out the
>> > > RUNNING.txt file in your download or look here.
>> > >
>> > >
>> > >
>> >
>> http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/RUNNING.txt?view=markup
>> > >
>> > > I'd suggest getting everything working with multiple instance first.
>> > Once
>> > > you can start the instances from the command line then worry about
>> > starting
>> > > them with systemd.
>> > >
>> > >
>> > > >
>> > > > 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
>> > > >
>> > >
>> > > Also an option, but not as efficient.
>> > >
>> > > Dan
>> > >
>> > >
>> > > >
>> > > > 2014-12-10 16:27 GMT+01:00 Christopher Schultz <
>> > > > chris@christopherschultz.net
>> > > > >:
>> > > >
>> > > > > -----BEGIN PGP SIGNED MESSAGE-----
>> > > > > Hash: SHA256
>> > > > >
>> > > > > 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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>> > > > > -----END PGP SIGNATURE-----
>> > > > >
>> > > > >
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