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
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.
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Shouldn't we use systemd-timesyncd, which is installed anyway (and some sources consider ntpd to be somewhat outdated)?
Peter
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/...
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 Shouldn't we use systemd-timesyncd, which is installed anyway (and some sources consider ntpd to be somewhat outdated)?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.
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/...
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 _______________________________________________ server mailing list -- server@lists.fedoraproject.org To unsubscribe send an email to server-leave@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/server@lists.fedoraproject.org
On Wed, Dec 30, 2020 at 05:57:35PM +0100, Carlos Vidal wrote:
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 :-)
+1 to chrony... if we aren't enabling it, we should be.
kevin
Fedora has chronyd.service enabled with vendor preset enabled for a long time. And Fedora Server inherits this from:
https://src.fedoraproject.org/rpms/fedora-release/blob/master/f/90-default.p...
Also, did a clean install just now to double check it and it's enabled and running.
-- Chris Murphy
Yeah, I am also in favour of chronyd.
If I remember well, *chronyd *is also used in RHCSA training, so that somehow keeps us in sync with RHEL administration and I believe that the more you can move from Fedora to RHEL and back without unnecessary obstacles, the better.
On Thu, Dec 31, 2020 at 2:51 AM Chris Murphy lists@colorremedies.com wrote:
Fedora has chronyd.service enabled with vendor preset enabled for a long time. And Fedora Server inherits this from:
https://src.fedoraproject.org/rpms/fedora-release/blob/master/f/90-default.p...
Also, did a clean install just now to double check it and it's enabled and running.
-- Chris Murphy _______________________________________________ server mailing list -- server@lists.fedoraproject.org To unsubscribe send an email to server-leave@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/server@lists.fedoraproject.org
On Thu, Dec 31, 2020 at 5:03 AM Lukas Ruzicka lruzicka@redhat.com wrote:
Yeah, I am also in favour of chronyd.
If I remember well, chronyd is also used in RHCSA training, so that somehow keeps us in sync with RHEL administration and I believe that the more you can move from Fedora to RHEL and back without unnecessary obstacles, the better.
I prefer using chronyd for all Fedora variants, it's a very nice time server daemon, so I think we should keep things as-is.
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Carlos Vidal -
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Kevin Fenzi -
Lukas Ruzicka -
Neal Gompa -
Peter Boy -
Tomasz Torcz