Re: Fedora 34 Change proposal: Remove and deprecate nscd in favour of sssd and systemd-resolved (Self-Contained Change)

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On Thu, Nov 5, 2020 at 6:39 AM Petr Menšík <pemensik@xxxxxxxxxx> wrote:
>
> No, no, NO again.
>
> nscd has no important active bugs in Fedora. I am not sure what bugs are
> mentioned, but just a few active bugs are on glibc component in Fedora.
> Therefore it seems just fine no commits are good.
>
> Just unlike systemd-resolved, which actively breaks some use cases. It
> changes resolution order of search directive in resolv.conf, breaks
> DNSSEC, breaks one label names resolution. It is famous among DNS
> community [1].

sssd also breaks other LDAP setups, It's extremely broken with larger
LDAP setups because it insists on caching *ALL* of the LDAP, barring
being able to filter to only a smaller set of the LDAP. But because so
many LDAP setups scatter group and user information in so many
distinct parts of the LDAP layout, this never works and it *ALWAYS*
times out in large, remot4e LDAP setups. It works for a few seconds at
start time, then crashes and takes out *all* sssd based services.

The sophisticated setups available by hand-editing sssd are also
*inevitably* overwritten by any use of the 'authconfig' command, which
is used by various RPM '%post' operations. sssd's configuration
options are so poor that they may as well be malicious. It is most
effective in small and unsophisticated network environments. It
suffers from the "systemd" style, sprawling universal management tool
design principles and makes many straightforward operations very
difficult if not impossible.

nscd is a lightweight and *far* more stable tool, and should be used
in preference to sssd wherever possible. An indepent LDAP and Kerberos
toolkit is *far* more stable than sssd.

> Instead, I request again, split systemd-resolved into subpackage. I want
> it removed on my system and so do more people. Also, when I disable it,
> I have to fix /etc/resolv.conf by hand. I would think NetworkManager
> restart would refresh classic /etc/resolv.conf, like in F32.

That's a separate issue. Maybe start a separate thread about that?
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