[Koha-devel] Replace some koha-* scripts that use "daemon" with systemd unit files

[dcook at prosentient.com.au]

I've got a local package installing a systemd template unit file at
/etc/systemd/system/koha-mq-scheduler at .service. Now all it takes it
"systemctl start koha-mq-scheduler at INSTANCE.service" to start, but in
hindsight it actually makes sense to use koha-mq-scheduler script to handle
--enable, --disable, --start, --restart, and --stop.

 

So I guess keeping the koha-* scripts makes sense but swapping out "daemon"
with systemd template unit files instead. 

 

I suppose one thing to keep in mind is "adjust_paths_dev_install". I'm not
familiar with that functionality. 

 

David Cook

Systems Librarian

Prosentient Systems

72/330 Wattle St

Ultimo, NSW 2007

Australia

 

Office: 02 9212 0899

Online: 02 8005 0595

 

From: Koha-devel <koha-devel-bounces at lists.koha-community.org> On Behalf Of
dcook at prosentient.com.au
Sent: Thursday, 4 June 2020 12:31 PM
To: 'Koha Devel' <koha-devel at lists.koha-community.org>
Cc: 'Victor Grousset' <victor.grousset at biblibre.com>
Subject: [Koha-devel] Replace some koha-* scripts that use "daemon" with
systemd unit files

 

Hi all,

 

What do people think about replacing some of the koha-* script files with
systemd unit files?

 

I'm creating a service for a RabbitMQ-based task scheduler and my unit file
is 17 declarative configuration lines. Creating a koha-mq-scheduler file
looks like it'll be hundreds of lines of shell script code.

 

My unit file is actually a "template" file, which means I have 1 file in
/etc/systemd/system/koha-mq-scheduler at .service
<mailto:/etc/systemd/system/koha-mq-scheduler at .service>  and I can just
invoke "systemctl start koha-mq-scheduler at INSTANCE.service
<mailto:koha-mq-scheduler at INSTANCE.service> " to start the service. You can
use the %i placeholder in the unit file and it will be replaced with
INSTANCE, so you can set paths, environmental variables, et cetera very
easily. It's so easy and convenient.

 

I think all modern Linux OSes use systemd for their init system, so I think
it would be pretty safe to use. 

 

I'm happy to work on this one, but I guess I'd like to see if other people
have interest in this.

 

David Cook

Systems Librarian

Prosentient Systems

72/330 Wattle St

Ultimo, NSW 2007

Australia

 

Office: 02 9212 0899

Online: 02 8005 0595

 

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