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Date: Fri, 23 Oct 2020 12:58:03 -0400
From: Rich Felker <dalias@...c.org>
To: Jesse Hathaway <jesse@...ki-mvuki.org>
Cc: musl@...ts.openwall.com, Arjun Shankar <arjun@...hat.com>,
Florian Weimer <fweimer@...hat.com>,
Carlos O'Donell <carlos@...hat.com>
Subject: Re: Plans to remove nscd in Fedora
On Fri, Oct 23, 2020 at 09:14:01AM -0500, Jesse Hathaway wrote:
> On Fri, Oct 23, 2020 at 8:29 AM Carlos O'Donell <carlos@...hat.com> wrote:
> > My opinion is that we want something much thinner than nscd to provide
> > NSS for statically linked applications, and that such an interface
> > should not provide caching. If we really wanted we could keep the nscd
> > socket interface but implement an NSS daemon for this e.g. nssd that would
> > just run all the time and could be depended upon by static applications.
> > It would have to be well audited and very simple.
> >
> > The caching that nscd does has many legacy problems that are better solved
> > and maintained by other daemons that implement a split NSS module approach
> > (as Florian notes).
>
> Given the increasing prevalence of statically deployed programs from languages
> such as C, Go, Rust, and even Haskell. I would love to see continued
> distribution support for querying NSS from these programs. An nscd variant
> without caching seems like a good approach, but I think it would be unfortunate
> to remove nscd from distributions before an alternative approach was available.
Yes! As Laurent also noted, the real value here is maintaining the
continuity of having a common, widely-deployed protocol and interface
to perform NSS queries over. This doesn't necessitate keeping nscd
permanently but does mean it should be removed only at the same time a
replacement is deployed.
Rich
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