[bug#38720] [PATCH] system: linux-container: Recommend guix container

[Efraim Flashner]

On Mon, Dec 30, 2019 at 11:05:02PM +0100, Ludovic Courtès wrote:
> Hi!
> 
> Efraim Flashner <address@hidden> skribis:
> 
> > I've been using guix containers on foreign systems to bring some Guixy
> > goodness to the unwashed sysadmins out there. When the container starts
> > up it displays a message like "Run 'sudo nsenter -a -t 65698' to get a
> > shell into it." Sometimes when I try to do that I'll get an error
> > message back about the system's nsenter not knowing about the '-a' flag.
> > I have found that using a 'guix container' command works well for me.
> 
> Oh.  I was conservative and thought that people would rather use
> “standard” tools.
> 
> > From f2cd59c9eb756e243a5a01e6cd3a6a6e58a02be6 Mon Sep 17 00:00:00 2001
> > From: Efraim Flashner <address@hidden>
> > Date: Mon, 23 Dec 2019 16:05:04 +0200
> > Subject: [PATCH] system: linux-container: Recommend guix container.
> >
> > * gnu/system/linux-container.scm (container-script)[script]: Recommend
> > using 'guix container' to get a shell inside the running container.
> 
> [...]
> 
> > -              ;; XXX: Should we recommend 'guix container exec'?  It's more
> > -              ;; verbose and doesn't bring much.
> > -              (info (G_ "Run 'sudo nsenter -a -t ~a' to get a shell into 
> > it.~%")
> > +              (info (G_ "Run 'sudo guix container exec ~a 
> > /run/current-system/profile/bin/bash --login' to get a shell into it.~%")
> >                      pid)
> 
> The comment is still correct: “guix container exec” is more verbose.
> :-)

I can update the comment :)

> Should we change it so that “guix container exec PID” without additional
> arguments runs /bin/sh by default, or something like that?

I've never really used docker, but I'm pretty sure when you enter a
docker container you also need to give it the path to a binary you want
to run.

I've thought about it a bit and now it displays this:

(ins)efraim@E5400 ~/workspace/guix$ sudo 
/gnu/store/7l5qdb0lw4bbghd17cam8pzdaz86zd3l-run-container
system container is running as PID 13663
Run 'sudo guix container exec 13663 /run/current-system/profile/bin/bash 
--login'
or run 'sudo nsenter -a -t 13663' to get a shell into it.

making '/gnu/store/8rrwm6wdyzl5i4g38va29azxki412nkr-system' the current 
system...
setting up setuid programs in '/run/setuid-programs'...
populating /etc from /gnu/store/lvxrcy913ga9g4sg549kk06krb8bbq6m-etc...

I think I like it like this with both options.

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0001-system-linux-container-Recommend-guix-container.patch
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