Building Docker images of GuixSD

[ludo@gnu.org (Ludovic Courtès)]

Hi Chris,

Nice work on building Docker images of GuixSD!

Chris Marusich <cmmarusich@gmail.com> skribis:

> [    1.345843] FS-Cache: Loaded
> [    1.362140] 9pnet: Installing 9P2000 support
> [    1.366118] 9p: Installing v9fs 9p2000 file system support
> [    1.368730] FS-Cache: Netfs '9p' registered for caching
> configuring QEMU networking...
> loading '/gnu/store/jy509dgcsz82y13fmizv2sqaj90s1vfg-linux-vm-loader'...
> ERROR: In procedure dynamic-link:
> ERROR: In procedure dynamic-link: file: "/gnu/store/hwygv5jwd47amhp1m67iy3bkvxqjlbhm-libgcrypt-1.8.1/lib/libgcrypt", message: "file not found"

The code above is running in the initrd, which means that it’s executed
by ‘guile-static-stripped’, which does not support dlopening:

--8<---------------cut here---------------start------------->8---
$ guix environment -C --ad-hoc guile-static-stripped libgcrypt -- guile

[...]

GNU Guile 2.2.2
Copyright (C) 1995-2017 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> (file-exists? (string-append (getenv "GUIX_ENVIRONMENT") "/lib/libgcrypt.so"))
$1 = #t
scheme@(guile-user)> (dynamic-link (string-append (getenv "GUIX_ENVIRONMENT") "/lib/libgcrypt"))
ERROR: In procedure dynamic-link:
ERROR: In procedure dynamic-link: file: "/gnu/store/wplxvw0mxxy35j7019j6mkjvpgl0hs1g-profile/lib/libgcrypt", message: "file not found"

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]>
--8<---------------cut here---------------end--------------->8---

(The “file not found” message is misleading.)

So we should either make a big initrd with the dynamically-linked Guile,
but then we may need to pass “-m 512” or similar to qemu…

Or we mount the host store over 9p and exec a dynamically-linked Guile
from there.

I realize it’s a bit sketchy, but I hope it makes sense.

Thanks,
Ludo’.