Using PLCnext Yocto Sysvinit to start a dotnet service.

fblanchard · June 2020

Hello,

What is the best practice to start a C# DotNet service using SysvInit ? I would prefer using use a modern system like “systemd”, but as your Yocto configuration comes with SysvInit, and that there is not much documentation on how using this service framework to start dotnet application, I wonder if you know how to do it.

I am fully open to suggestions.

(Note that I already know how to start a dotnet console app on PLCnext and know the basic of SysvInit).

Thanks,

Frédéric

Using 2020.0.1 framework

Oliver PLCnext Team · June 2020

Hello Frederic,

I dont think that this is anything different for .NetCore binaries then for other System Init Processes.
So the best practice for init.d is to provide a update-rc compatible init script and using the start-stop-daemon to setup your binary.

Search for Sysv init.d tutorials and update-rc.

/etc/init.d/skeleton

#! /bin/sh
	### BEGIN INIT INFO
	# Provides: skeleton
	# Required-Start: $remote_fs $syslog
	# Required-Stop: $remote_fs $syslog
	# Default-Start: 2 3 4 5
	# Default-Stop: 0 1 6
	# Short-Description: Example initscript
	# Description: This file should be used to construct scripts to be
	# placed in /etc/init.d.
	### END INIT INFO

	# Author: Foo Bar <<a href="mailto:foobar@baz.org>">foobar@baz.org>;
	#
	# Please remove the "Author" lines above and replace them
	.# with your own name if you copy and modify this script. .... ...

....

Depending on your application you might also think about providing it as a Daemon App.
For easier deployment to your PLCs via the WBM...

https://github.com/PLCnext/PLCnextAppExamples/tree/public/DemoApps

fblanchard · July 2020

Thanks Oliver. I will look at theses examples soon.

fblanchard · September 2020

I finally made it work using traditional SysVinit scripting (i.e. without using the command "start-stop-daemon" like the nginx script does)

Using PLCnext Yocto Sysvinit to start a dotnet service.

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