From: "Ludovic Courtès" <ludo@gnu.org>
To: Felix Lechner via "Development of GNU Guix and the GNU System
distribution." <guix-devel@gnu.org>
Cc: Felix Lechner <felix.lechner@lease-up.com>
Subject: Re: Upgrading Shepherd services
Date: Fri, 17 May 2024 17:20:03 +0200 [thread overview]
Message-ID: <877cfs5uu4.fsf@gnu.org> (raw)
In-Reply-To: <87le49uymn.fsf@lease-up.com> (Felix Lechner via's message of "Thu, 16 May 2024 16:26:40 -0700")
Hi Felix,
Felix Lechner via "Development of GNU Guix and the GNU System
distribution." <guix-devel@gnu.org> skribis:
> I have a lot of custom Shepherd services. Every so often I make a
> mistake that stalls the step in 'guix deploy' that upgrades Shepherd
> services, but without any error messages.
>
> Unfortunately, I can also no longer run 'herd status', which likewise
> hangs, or 'reboot'. How may I debug such issues in my operating-system
> declaration, please?
The standard service constructors are de-constructors cannot block
shepherd entirely (at least not AFAIK). So my suggestion would be to
first look at any service you’re using that has a custom ‘start’ or
‘stop’ method doing weird things; make sure none of them can block.
Another thing: when shepherd is blocked, try “sudo strace -p1” so see
what syscall it’s waiting to complete (that’s the likely problem).
In addition, check the last lines of /var/log/messages so see what
shepherd was trying to do before blocking.
HTH!
Ludo’.
next prev parent reply other threads:[~2024-05-17 15:20 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-16 23:26 Upgrading Shepherd services Felix Lechner via Development of GNU Guix and the GNU System distribution.
2024-05-17 10:59 ` Attila Lendvai
2024-05-23 2:04 ` Felix Lechner via Development of GNU Guix and the GNU System distribution.
2024-05-23 19:25 ` Attila Lendvai
2024-05-24 4:17 ` Felix Lechner via Development of GNU Guix and the GNU System distribution.
2024-05-24 17:19 ` Attila Lendvai
2024-06-01 13:24 ` Ludovic Courtès
2024-05-17 15:20 ` Ludovic Courtès [this message]
2024-05-19 15:55 ` Felix Lechner via Development of GNU Guix and the GNU System distribution.
2024-05-25 9:02 ` Attila Lendvai
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