From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Struggling with a caching substitute server
Date: Mon, 04 Apr 2016 23:04:12 +0200
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References: <20160404135637.GA30755@thebird.nl>
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In-Reply-To: <20160404135637.GA30755@thebird.nl> (Pjotr Prins's message of
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To: Pjotr Prins <pjotr.public12@thebird.nl>
Cc: guix-devel@gnu.org

Pjotr Prins <pjotr.public12@thebird.nl> skribis:

> I am running client and server in exactly the same checked out guix
> repository. Server:
>
>   ./pre-inst-env guix publish -u guix-publisher
>     publishing /gnu/store on 0.0.0.0, port 8080
>
> Client on the same server
>
>   ./pre-inst-env guix package -i hello --dry-run

If =E2=80=98guix publish=E2=80=99 and =E2=80=98guix package=E2=80=99 run on=
 the same machine, then
nothing will happen: =E2=80=98guix publish=E2=80=99 serves what=E2=80=99s i=
n /gnu/store, and
=E2=80=98guix package=E2=80=99 will resort to substitutes only when somethi=
ng=E2=80=99s missing
from /gnu/store, in which case =E2=80=98guix publish=E2=80=99 won=E2=80=99t=
 have it either.

> Now from a different remote machine using my substitute caching server
>
>   ./pre-inst-env guix package -i hello --substitute-urls=3D"http://guix.m=
yserver.org" --dry-run
>
> keeps on wanting to build the thing from scratch.

Did you authorize the singing key of that server?

> Query from main server:
>
> GET /nix-cache-info
> GET /xgm6wxkja6llvkz8jck95i6cmh3c93yh.narinfo
> GET /w6im8ck36hpjyh9zjmz9mr2vkppfhzid.narinfo
> GET /9wq9z5jq3g691f836lhi0633g26lfl8n.narinfo
>
> Query from remote
>
> GET /nix-cache-info
> GET /x2lhjhbxd5dqmis350gkc352v9z1pr8r.narinfo
> GET /jkxa2ga4x0gqvx6x790anpwhnm7d278w.narinfo
> GET /ic8sabq35jisj5wmi860d85i09qghq1x.narinfo
>
> which suggests the files it wants to fetch are not the same, though the s=
tarting point=20
> (the checked out guix dir) should be exactly the same. The last commit is=
 the same.

The set of narinfos queried is a function of what=E2=80=99s in the local
/gnu/store (clients only ask about things not already on disk) so it=E2=80=
=99s
normal that the requests differ.

HTH!

Ludo=E2=80=99.