From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: offload daemon
Date: Wed, 24 May 2017 12:10:21 +0200
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To: James Richardson <james@jamestechnotes.com>
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James Richardson <james@jamestechnotes.com> skribis:

> James Richardson writes:
>
>> Ludovic Court=C3=A8s writes:
>>
>>> Hello,
>>>
>>> James Richardson <james@jamestechnotes.com> skribis:
>>>
>>>> I am trying to setup an offload daemon.
>>>>
>>>> I have everything setup correctly (I think ;)
>>>>
>>>> $ guix offload test completes successfully.
>>>>
>>>> The offload daemon is actually guix on a foreign distro (Debian sid in
>>>> this case).
>>>>
>>>> Neither guix running on top of a Debian (sid and jessie) nor guixsd se=
em
>>>> to even call out to the offload daemon. All boxen are 64.
>>>>
>>>> My /etc/guix/machines.scm is here
>>>>
>>>> (list (build-machine
>>>>        (name "thor.lab01.jamestechnotes.com")
>>>>        (system "x86_64-linux")
>>>>        (host-key "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJf0ezYgeVFit40V=
JwaBEW1dGm2Xz+SHzVmib8IbN58y root@thor")
>>>>        (user "guix")
>>>>        (speed 1.)
>>>>        (private-key
>>>> 	(string-append (getenv "HOME")
>>>>        	       "/.ssh/identity-for-guix"))))
>>>>
>>>> Is x86_64-linux the proper system type?
>>>
>>> Yes.
>>>
>>> There are several things to consider here.  By default, guix-daemon
>>> creates a single job, so that single job will end up being built
>>> locally, unless you spawn, say, two =E2=80=9Cguix build=E2=80=9D comman=
ds in parallel
>>> (the number of jobs is per client.)
>>>
>>> Running =E2=80=9Cguix-daemon --max-jobs=3D0=E2=80=9D should force all b=
uilds to be
>>> offloaded:
>>>
>>>   https://www.gnu.org/software/guix/manual/html_node/Invoking-guix_002d=
daemon.html
>>>
>>> I *think* =E2=80=9Cguix build --max-jobs=3D0=E2=80=9D should give the s=
ame result.
>>>
>>> Alternately, if you run =E2=80=9Cguix build --max-jobs=3D2=E2=80=9D, pr=
esumably half of
>>> the builds will be offloaded.
>>>
>>> Let us know if that works for you.
>>>
>>> Ludo=E2=80=99.
>>
>> I have a permission problem somewhere, I think. If I run as root offload
>> works, otherwise it doesn't. Don't really know here to look from here.
>
> Hmm, I move the key pair to /tmp and set the perms to 644 and offloading
> works for my regular user... Not quite sure I understand why.

The =E2=80=98guix offload=E2=80=99 command is invoked by guix-daemon as roo=
t.  So when
it is invoked, (getenv "HOME") returns "/root" or similar.  Could that
be the problem?

HTH,
Ludo=E2=80=99.