Re: How to enable server discovery in foreign distro?

[Rodrigo Morales]

Table of Contents
_________________

1. The solution
2. Pending question


1 The solution
==============

  I managed to do it. I'll share some relevant information for those
  interested.

  [This section] in the Info manual helped me do what I was looking
  for. As specified in that part of the manual, I need to edit
  guix-daemon.service. In my system, there were 4 files with that name
  (see code block below)

  ,----
  | rdrg@desktop:~$ locate -r 'guix-daemon.service$'
  | /etc/systemd/system/multi-user.target.wants/guix-daemon.service
  | /run/systemd/units/invocation:guix-daemon.service
  | /usr/lib/systemd/system/guix-daemon.service
  | 
/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/guix-daemon.service
  `----

  The file `/run/systemd/units/invocation:guix-daemon.service' was a
  broken symbolic link (see code block below), so I knew that I
  shouldn't edit this file.

  ,----
  | rdrg@desktop:~$ file /run/systemd/units/invocation:guix-daemon.service
  | /run/systemd/units/invocation:guix-daemon.service: broken symbolic
link to 8dbd9f7458e74f979a2b8d214ed47d42
  `----

  The file
  
`/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/guix-daemon.service'
  wsa empty (see code block below), so I knew that I shouldn't edit this
  file.

  ,----
  | rdrg@desktop:~$ file
/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/guix-daemon.service
  | 
/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/guix-daemon.service:
empty
  `----

  The file
  `/etc/systemd/system/multi-user.target.wants/guix-daemon.service' was
  a symbolic link to `/usr/lib/systemd/system/guix-daemon.service' and,
  for that reason, I ended up editing
  `/usr/lib/systemd/system/guix-daemon.service'. I edited the line
  containing `ExecStart' and added the IP address of my system from
  which I wanted to retrieve the packages.

  ,----
  | rdrg@desktop:~$ cat /usr/lib/systemd/system/guix-daemon.service
  | # This is a "service unit file" for the systemd init system to launch
  | # 'guix-daemon'.  Drop it in /etc/systemd/system or similar to have
  | # 'guix-daemon' automatically started.
  |
  | [Unit]
  | Description=Build daemon for GNU Guix
  |
  | [Service]
  | ExecStart=/usr/bin/guix-daemon --build-users-group=_guixbuild
--substitute-urls='http://192.168.1.39:8080 https://ci.guix.gnu.org
https://bordeaux.guix.gnu.org'
  | Environment=LC_ALL=C.UTF-8
  | StandardOutput=syslog
  | StandardError=syslog
  |
  | # Work around a nasty systemd ‘feature’ that kills the entire process tree
  | # (including the daemon!) if any child, such as cc1plus, runs out of memory.
  | OOMPolicy=continue
  |
  | # Despite the name, this is rate-limited: a broken daemon will
eventually fail.
  | Restart=always
  |
  | # See <https://lists.gnu.org/archive/html/guix-devel/2016-04/msg00608.html>.
  | # Some package builds (for example, go@1.8.1) may require even more than
  | # 1024 tasks.
  | TasksMax=8192
  |
  | [Install]
  | WantedBy=multi-user.target
  `----

  Finally, I executed the following two commands.

  ,----
  | systemctl daemon-reload
  | systemctl restart guix-daemon.service
  `----

  When I executed `guix home', the packages were retrieved from my other
  system (see line below `substitute: updating substitutes from
  'http://192.168.1.39:8080'... 100.0%').

  ,----
  | rdrg@desktop:~$ guix home -L ~/guix-packages reconfigure
~/guix-config/home-configuration.scm
  | hint: Consider installing the `glibc-locales' package and defining
`GUIX_LOCPATH', along these lines:
  |
  |      guix install glibc-locales
  |      export GUIX_LOCPATH="$HOME/.guix-profile/lib/locale"
  |
  | See the "Application Setup" section in the manual, for more info.
  |
  | guix home: warning: cannot determine provenance for current system
  | substitute: updating substitutes from 'http://192.168.1.39:8080'... 100.0%
  | substitute: updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
  | substitute: updating substitutes from
'https://bordeaux.guix.gnu.org'... 100.0%
  | The following derivations will be built:
  |   /gnu/store/kdlm30fl3cv6r0ww2njm0d7w8cipjpyj-home.drv
  |   /gnu/store/76835anafmiz8ngx2aqwynps72m0wmgd-setup-environment.drv
  | (... some omitted lines ...)
  `----


[This section]
<https://guix.gnu.org/manual/en/html_node/Getting-Substitutes-from-Other-Servers.html>


2 Pending question
==================

  I was able to download packages from my other system without having
  to perform the following step which is mentioned in [the
  aforementioned part of the manual].

  ,----
  | guix archive --authorize < key.pub
  `----

  I wonder whether this command is relevant in this context or not. Any
  information is appreciated.


[the aforementioned part of the manual]
<https://guix.gnu.org/manual/en/html_node/Getting-Substitutes-from-Other-Servers.html>