bug#22039: [PATCH] 'guix system reconfigure' must start/restart/stop services

[Ludovic Courtès]

Hi Carlo,

Carlo Zancanaro <address@hidden> skribis:

> When the next release of the Shepherd is made (including commit
> 9ec5c0000e9a45441417a6ee4138cdcbf1b1f2b2) we should have the
> capability to resolve this ticket.

Woohoo!

I’d like to make sure we understand the story with ‘EINTR-safe’, but
after that I’m happy to push a release.

> Attached is my proposed patch from the Guix side. I have tested it on
> my machine by grafting the Shepherd with the appropriate patch and it
> seems to work as expected.
>
> I tested it by changing the substitute-urls in my guix-daemon
> configuration. The output of `ps aux | grep guix-daemon` after `guix
> system reconfigure` showed the substitute-urls were unchanged. After
> `herd restart guix-daemon` the updated substitute-urls appeared in `ps
> aux | grep guix-daemon`. I did not need to reboot my system.

Perfect.

> One possible improvement would be to print out the services that need
> to be restarted to be upgraded.

Yes, that’d be nice.

> From 162bd298563201ebf6eda87d46ae1b64671397da Mon Sep 17 00:00:00 2001
> From: Carlo Zancanaro <address@hidden>
> Date: Sun, 26 Aug 2018 21:54:14 +1000
> Subject: [PATCH] gnu: services: Load all services on reconfigure, not just
>  stopped ones
>
> * gnu/services/shepherd.scm (shepherd-service-upgrade): Remove checks for
> running services.

Could you adjust the manual, where it currently says “if a service is
currently running, it does not attempt to upgrade it”?

Other than that LGTM!

Ludo’.