I think Chrony is the most flexible (see https://chrony.tuxfamily.org/comparison.html ).

NTPD was a very nice implementation once upon a time. Thanks to it Chrony is as good as it is, this is open source evolution :-)

Carlos

On Wed, Dec 30, 2020 at 12:08 PM Tomasz Torcz <tomek@pipebreaker.pl> wrote:
On Wed, Dec 30, 2020 at 12:04:50PM +0100, Peter Boy wrote:
> In the log of several of my Fedora servers I just found a "complaint“ about a missing time synchronization.
>
> Obviously there are 3 options:
>
> ntpd
> - not installed by default
> - documented in the installation guide
>
> chronyd
> - not installed by default (I guess, not sure)
> - not activated by default
> - documented in the installation guide

  I think chronyd IS installed by default.

>
> systemd-timesyncd
> - installed by default
> - not activated by default
> - not documented in the installation guide
>
>
> In the documentation crony ist recommended for workstations („frequently suspended…“)
>
> For systems „.. normally kept permanently on“ ntpd is recommended.

  Not anymore. We are close to removing ntpd from distribution
  https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org/thread/J5NQVMH5FKA4XHXMTZS2M3XUUXYDHDXD/

>
> What want we recommend for Fedora Server?
> Isn't it desirable for Server to enable time synchronization by default?
> Shouldn't we use systemd-timesyncd, which is installed anyway (and some sources consider ntpd to be somewhat outdated)?

  timesyncd is very simple, it's not even NTP (SNTP only), doesn't
  implement NTS and so on.

--
Tomasz Torcz                 Morality must always be based on practicality.
tomek@pipebreaker.pl                 — Baron Vladimir Harkonnen
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