On Wed, Oct 9, 2024 at 6:56 AM Pavel Březina <pbrezina@xxxxxxxxxx> wrote:
Hi Fedora,
nss-altfiles is not currently part of the default installation and can
be optionally added to nsswitch.conf via authselect's with-altfiles.
This however breaks ostree composes since it uses and requires alltfiles
to provide system users. This is handled in authselect spec file that
tinkers with the shipped profiles and hardcodes altfiles to the
configuration. [1] It works as expected.
Downside is that the authselect content we ship is different for ostree
systems and standard composes.
There is also an issue with bootc. Authselect have to be part of the
source bootc image, if it is installed later by dnf, it does not work
because there is no /run/ostree-booted during container image build
time. This, however, does not really affect Fedora 38+ since authselect
is required by pam and part of default installation. It may affect other
distributions though.
Unless there is some push back, I would like to change authselect to
require nss-altfiles and hardcode altfiles in nsswitch.conf for everyone
and finally get rid of this duality.
I'm not going to object to that (others might) but this discussion does
a bit in that...I think a closer-to-ideal solution is that glibc supports drop-ins or discovery,
something like `/usr/lib/glibc/nss.d/passwd/90-altfiles -> /usr/lib64/libnss_altfiles.so.2` or so...
Then we get nss-altfiles in the list if and only if it's installed, and regardless of the authselect profile in use, which I think is what we've wanted from the start here...
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