Re: "user with UID not found" error

[Jack Hill]

On Mon, 1 Aug 2022, Christopher Batten wrote:

> > > > > On Jul 27, 2022, at 8:44 AM, Ricardo Wurmus <rekado@elephly.net> wrote:
> > > > >
> > > > > Hi Christopher,
> > > > >
> > > > > > Turns out we are using SSSD not NCSD on our Linux systems. It seems to be 
> > > > > > working fine:
> > > > >
> > > > > You will need to run NSCD if you want Guix software to be able to talk
> > > > > to the system’s SSSD.  The reason is that SSSD works by having
> > > > > applications load a library whereas NSCD implements a network protocol.
> > > > > Software built with Guix cannot load the system libary due to ABI
> > > > > conflict, but it *can* talk to NSCD over the network.
> > > > >
> > > > > The system NSCD talks to the system SSSD, so there’s no problem there.
> > > > >
> > > > > --
> > > > > Ricardo
> > >
> > > On Wed, Jul 27, 2022 at 12:51 PM Christopher Batten <cbatten@cornell.edu> wrote:
> > >
> > > Hmmm ... this made me think that running both was not a great idea?
> > >
> > > https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system-level_authentication_guide/usingnscd-sssd
> > >
> > > But I am not an expert on any of this :) I guess the key is to just make sure 
> > > you only enable caching for hosts in /etc/nscd.conf?
> > >
> > > Best,
> > > Chris
> >
> > On Jul 28, 2022, at 9:14 PM, Chris Marusich <cmmarusich@gmail.com> wrote:
> >
> > FYI: https://lists.gnu.org/archive/html/guix-devel/2022-02/msg00263.html
>
> Thanks for everyone's help! I think I understand now: the key is if we want to 
> use guix, then we really do want to run NSCD and SSSD on these RHEL/CentOS 
> systems if at all possible.
>
> So I think we just now need to follow the instructions here?
>
> https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system-level_authentication_guide/usingnscd-sssd
>
> Or do you recommend a different way to run NSCD and SSSD at the same time on 
> RHEL/CentOS systems?
>
> Once we figure this out maybe we should add a note about this in the Guix docs 
> here:
>
> https://guix.gnu.org/manual/en/html_node/Application-Setup.html
>
> Especially if Fedora is intending to remove NSCD?
>
> Thanks!
> Chris

I think I've run into a similar issue trying to run packs as well (in my 
case on AlmaLinux 9). I produced a pack with

`guix pack -f tarball -RR -S /bin=bin screen sssd glibc`

and running screen from the pack reports:

"getpwuid() can't identify your account!"

screen might be a special-case of program, but it seems the problem exists 
in some way even when not trying to install Guix.

Best,
Jack