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bug#45302: Avahi substitute discovery keeps trying to ping unaccessible
From: |
Maxim Cournoyer |
Subject: |
bug#45302: Avahi substitute discovery keeps trying to ping unaccessible servers |
Date: |
Mon, 21 Dec 2020 22:25:03 -0500 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) |
Hello,
Pierre Neidhardt <mail@ambrevar.xyz> writes:
> I've set up my desktop and laptop to use the new substitute discovery
> feature, it's awesome!
>
> However, when I put my desktop to sleep and run a Guix command on my
> laptop that requires access to a sbustitute server, I see this:
>
> $ guix build ncdu
> substitute: guix substitute: warning: 10.0.0.5: connection failed: No route
> to host
> substitute: updating substitutes from 'http://ci.guix.gnu.org'... 100.0%
> 0.0 MB will be downloaded:
> /gnu/store/p70r4maqgh6ghl25h5a99w7sf1jidap8-ncdu-1.15.1
> substituting /gnu/store/p70r4maqgh6ghl25h5a99w7sf1jidap8-ncdu-1.15.1...
>
>
> The warning
>
> substitute: guix substitute: warning: 10.0.0.5: connection failed: No route
> to host
>
>
> pops up on every download, which adds some 2s delay each time. This
> makes the whole process much slower.
>
> For your information, Avahi does not find my desktop:
>
> $ sudo avahi-browse -al
> Password:
> + wlp2s0 IPv6 FOO___s MacBook Pro _companion-link._tcp
> local
> + wlp2s0 IPv4 FOO___s MacBook Pro _companion-link._tcp
> local
> C-c C-cGot SIGINT, quitting.
This reminds me of https://issues.guix.gnu.org/30290. Perhaps if we can
fix that one it'd make this one go away too?. I was thinking of having
a simple mean to reduce the request attempts on servers down for a long
while, such as entering dead periods (breaks): "I've tried X times, it
doesn't respond, I give up for the next Y minutes"; allowing for X and Y
to be configured via the <guix-publish-configuration> record.
Do you think this would help?
Maxim