GNU bug report logs - #36855
'guix system switch-generation' does not reload Shepherd services

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From: Christopher Lemmer Webber <cwebber <at> dustycloud.org>
To: 36855 <at> debbugs.gnu.org
Cc: guix-devel <at> gnu.org
Subject: bug#36855: guix system switch-generation doesn't
Date: Wed, 07 Aug 2019 15:37:56 -0400

Could you look at bug #36878 and commit 1db6f137d... as of latest
master, is this fixed?

Robert Vollmert writes:

> Could we get some input on this bug?
>
> Maybe I’m misunderstanding something, but it seems that a core guix
> feature (atomic rollbacks) doesn’t work…
>
>> On 30. Jul 2019, at 12:00, Robert Vollmert <rob <at> vllmrt.net> wrote:
>> 
>> What I see:
>> 
>> 1. edit ~/pzprnode/pzprnode
>> 
>> rob <at> garp ~/pzprnode$ git diff
>> diff --git a/pzprnode b/pzprnode
>> index 612e6a8..d8ef0ea 100755
>> --- a/pzprnode
>> +++ b/pzprnode
>> @@ -190,5 +190,6 @@ const server = http.createServer((req, res) => {
>> });
>> 
>> server.listen(port, hostname, () => {
>> +       console.log("updated version");
>>       console.log(`Server running at http://${hostname}:${port}/`);
>> });
>> 
>> 2. sudo guix system reconfigure -L ~/garp-config ~/garp-config/config.scm
>> 3. sudo herd restart pzprnode
>> 4. less /var/log/messages
>> 
>> Jul 30 11:46:57 localhost shepherd[1]: Service pzprnode has been stopped. 
>> Jul 30 11:46:57 localhost shepherd[1]: Service pzprnode has been started. 
>> Jul 30 11:46:58 localhost pzprnode[4954]: updated version 
>> Jul 30 11:46:58 localhost pzprnode[4954]: Server running at http://127.0.0.1:3456/ 
>> 
>> 5. sudo guix system list-generations
>> 
>> Generation 151	Jul 30 2019 10:37:06
>> file name: /var/guix/profiles/system-151-link
>> canonical file name: /gnu/store/jis33accsfpa068aps0a9mrycmjzfm4m-system
>> label: GNU with Linux-Libre 5.2.1
>> bootloader: grub
>> root device: label: "guix-root"
>> kernel: /gnu/store/fp6wsvn10h1is0wkz8l2sbzjmjbzi7vr-linux-libre-5.2.1/bzImage
>> Generation 152	Jul 30 2019 11:43:13	(current)
>> file name: /var/guix/profiles/system-152-link
>> canonical file name: /gnu/store/3z3wmaj0399kihqc372y91nzcjxc1myl-system
>> label: GNU with Linux-Libre 5.2.1
>> bootloader: grub
>> root device: label: "guix-root"
>> kernel: /gnu/store/fp6wsvn10h1is0wkz8l2sbzjmjbzi7vr-linux-libre-5.2.1/bzImage
>> 
>> 6. sudo guix system switch-generation 151
>> 
>> substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
>> The following derivation will be built:
>>  /gnu/store/qvxbl3gm6406dbbkm8jigmpc8zi42lfw-grub.cfg.drv
>> building /gnu/store/qvxbl3gm6406dbbkm8jigmpc8zi42lfw-grub.cfg.drv...
>> switched from generation 152 to 151
>> 
>> 7. sudo herd restart pzprnode
>> 8. less /var/log/messages
>> 
>> Jul 30 11:48:02 localhost shepherd[1]: Service pzprnode has been stopped. 
>> Jul 30 11:48:02 localhost shepherd[1]: Service pzprnode has been started. 
>> Jul 30 11:48:03 localhost pzprnode[4994]: updated version 
>> Jul 30 11:48:03 localhost pzprnode[4994]: Server running at http://127.0.0.1:3456/ 
>> 
>> The line with “updated version” should not be there.
>> 
>> Presumably, this is due to switch-generations not calling upgrade-shepherd-services.
>> 

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