Unfortunately, I was exaggerating, when I said “task scheduler”. What I really have right now is just a FIFO worker that handles a long-running task for a custom local tool. I want to start small and build up, rather than trying to design something that will meet every use case.
But I have contributed my thoughts to https://bugs.koha-community.org/bugzilla3//show_bug.cgi?id=22417.
And actually I would really like to collaborate with you, Tomas, on creating functionality that would make Koha Plugins first class citizens for background tasks, as I think that will actually help us focus on the message queue and task scheduling systems rather than the tasks themselves.
David Cook
Systems Librarian
Prosentient Systems
72/330 Wattle St
Ultimo, NSW 2007
Australia
Office: 02 9212 0899
Online: 02 8005 0595
From: Tomas Cohen Arazi <tomascohen@gmail.com>
Sent: Thursday, 4 June 2020 12:44 PM
To: David Cook <dcook@prosentient.com.au>
Cc: Koha Devel <koha-devel@lists.koha-community.org>; Victor Grousset <victor.grousset@biblibre.com>
Subject: Re: [Koha-devel] Replace some koha-* scripts that use "daemon" with systemd unit files
Yeah, and contribute that task schedule in the meantime
El mié., 3 de junio de 2020 23:31, <dcook@prosentient.com.au> escribió:
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@.service and I can just invoke “systemctl start koha-mq-scheduler@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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